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한국운동생리학회> 운동과학> 위드 코로나 시대 8주간의 온라인 고강도 인터벌 트레이닝이 과체중 남성의 신체조성, 혈중지질, 사이토카인 및 삶의 질에 미치는 영향

KCI등재SCOUPUS

위드 코로나 시대 8주간의 온라인 고강도 인터벌 트레이닝이 과체중 남성의 신체조성, 혈중지질, 사이토카인 및 삶의 질에 미치는 영향

The Effect of 8 Weeks of Online High-Intensity Interval Training on Body Composition, Blood Lipids, Cytokines, and Quality of Life in Overweight Men during the COVID-19 Era

최동훈 ( Dong-hun Choi ) , 현아현 ( Ah-hyun Hyun )
  • : 한국운동생리학회
  • : 운동과학 31권1호
  • : 연속간행물
  • : 2022년 02월
  • : 62-71(10pages)
운동과학

DOI


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ORCID
REFERENCES

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PURPOSE: The purpose of this study is to investigate the effect of high-intensity interval training (HIIT), using real-time video application programs, on the body composition, blood lipids, cytokines, and quality of life (QOL) of over-weight men.
METHODS: The participants of this study were overweight men, aged < 45 years, who voluntarily applied to the online notices for this study. The men had a body mass index (BMI) >28. Twenty people participated in this experiment and were divided into two groups: a HIIT group (n=10) and a control group (n=10). Both groups were pre-examined to determine body composition, dual-energy X-ray absorptiometry, and QOL indices and also underwent blood tests. The HIIT group underwent high-intensity interval training for 8 weeks (twice a week and 35 minutes per day) using real-time video programs. The main exercise program for HIIT was 20 seconds high-intensity (85-90% HRmax) exercise followed by 30 seconds exercise at a 60% HRmax.
RESULTS: Comparison and analysis of the effects observed before and after the exercise revealed that the real-time online HIIT group showed reduced body fat (F=5.690, p=.028). Results of the blood tests showed that the high-density lipoprotein cholesterol (HDL; F=24.584, p=.001) was increased, while the low-density lipoprotein cholesterol (LDL; F=24.963, p=.001), triglycerides (TG; F=7.295, p=.015;), and total cholesterol (TC; F=14.934, p=.001) levels were decreased. No significant effects were observed on the insulin and c-reactive protein (CRP) levels. Finally, the QOL test results showed that the total score of the HIIT group had increased (F=190.815, p=.001).
CONCLUSIONS: Online HIIT is a useful method that aids in reducing fat levels in obese men and improving their blood lipid profile and QOL during the COVID-19 pandemic.

UCI(KEPA)

간행물정보

  • : 예체능분야  > 체육학
  • : KCI등재
  • : SCOPUS
  • : 계간
  • : 1226-1726
  • : 2384-0544
  • : 학술지
  • : 연속간행물
  • : 1996-2022
  • : 1103


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KCI등재 SCOPUS

1Letter to the Editor at Exercise Science

저자 : Song-young Park

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 2호 발행 연도 : 2022 페이지 : pp. 157-158 (2 pages)

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2The Association between Maternal Folate Status and Childhood Obesity-Systematic Review and Meta-Analysis

저자 : Junechul Kim , Bo-eun Yoon , Jinho Park , Eun Hye Kwon , Kyungun Kim , Sukho Lee

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 2호 발행 연도 : 2022 페이지 : pp. 159-167 (9 pages)

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PURPOSE: Maternal nutrition plays a crucial role in fetal growth and lifelong health outcomes. Folate is an essential methyl donor in the epigenetic programming of offspring. This review and meta-analysis was conducted to compile the evidence reported thus far to identify associations between maternal folate status and childhood obesity.
METHODS: A keyword/reference search was performed in EBSCOhost and Web of Science databases. A CMA program was used for a meta-analysis to estimate the pooled effect of maternal folate status on childhood obesity in offspring and to examine the influence of moderating variables on the overall effect.
RESULTS: Better maternal folate intake was associated with a lower risk of childhood obesity: the overall effect size (ES; Hedges' g) was 0.168 (95% CI=0.075 to 0.260, p<.001; small effects; cf., Cohen's criteria). Moderator analysis revealed that the ≥Q statistic for the age group was statistically significant (Qb=4.730, df=1. p=.030; heterogeneity of ES). In offspring < 7 years and >7 years, the ES was 0.277 (95% CI=0.151, 0.404) and 0.089 (95% CI=-0.025, 0.202), respectively. The study design was a statistically significant variable (Qb=4.310, df=1. p=.038; heterogeneity of ES). In cohort studies, ES was 0.251 (95% CI=0.135, 0.367), whereas in randomized controlled trial group, ES was 0.062 (95% CI=-0.073, 0.197).
CONCLUSIONS: Maternal folate intake significantly affects childhood obesity, and the effect of maternal folate status is stronger in children younger than 7 years.

KCI등재 SCOPUS

3Creatine Kinase and Lactate Dehydrogenase Enzymes Response to Lactate Tolerance Exercise Test

저자 : Karamatollah Rahmanian , Farhang Hooshmand , Masihollah Shakeri , Vahid Rahmanian , Fatemeh Sotoodeh Jahromi , Abdolreza Sotoodeh Jahromi

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 2호 발행 연도 : 2022 페이지 : pp. 168-172 (5 pages)

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PURPOSE: This study aimed to assess alterations in serum creatine kinase (CK) and lactate dehydrogenase (LDH) levels after performing a lactate tolerance exercise test (LTET) in elite male swimmers.
METHODS: Fourteen male adolescent swimmers participated in this study. All subjects performed LTET (8×100-meter swimming) with a 1-minute recovery interval between eight trainings. Plasma CK and LDH (markers of muscle damage) levels were measured 30 minute before and 24 hours after the test. A paired t-test was used for statistical analysis of data.
RESULTS: Plasma CK and LDH levels increased immediately after LTET as compared to the values 30 minutes prior to exercise (188.91±34.04 vs. 148.83±29.63 mg/dL, p=.029; 318.17±53.89 vs. 272.08±52.93 mg/dL, p=.010, respectively). Both CK and LDH levels displayed a decreasing trend 24 hours post-LTET; however, there was no significant difference immediately after the test.
CONCLUSIONS: Plasma CK and LDH levels increased following LTET, which is representative of muscle damage.

KCI등재 SCOPUS

4영양 건강 위험과 신체활동이 우울 증상에 미치는 영향

저자 : 권지혜 ( Jihye Gwon ) , 신지호 ( Jiho Shin ) , 강현식 ( Hyunsik Kang )

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 2호 발행 연도 : 2022 페이지 : pp. 173-180 (8 pages)

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PURPOSE: This cross-sectional study examined the combined effects of nutritional health risk and physical activity on depressive symptoms in a representative sample of older adults aged 65 years and older (4,116 men and 5,154 women) from the 2020 Korea Longitudinal Study of Aging.
METHODS: Nutritional health risk was categorized as good, moderate, and high according to the Nutrition Screening Initiative. Physical activity was assessed using a questionnaire. Depression was assessed using the Short Form of Geriatric Depression Scale (SGDS).
RESULTS: There were significant age differences (p<.001), education level (p<.001), marital status (p<.001), and SDGS (p<.001) according to nutritional health risk or physical activity status. In particular, a general linear model (GLM) showed a significant interaction (R2=.239, F(2,9849)=5.582, p<.004) between nutritional health risk and physical activity on SGDS-based depressive symptoms. The antidepressant effect of regular physical activity was observed in individuals with good or moderate nutritional health risks. However, such beneficial effects of physical activity were not observed in individuals with high nutritional health risks.
CONCLUSIONS: The current findings of this study suggest that both good nutrition and physical activity for mental health should be emphasized in older adults, with a greater focus on nutrition for those with a high nutritional health risk.

KCI등재 SCOPUS

5Effects of Inspiratory Muscle Training on Respiration and Balance in Patients with Stroke: A Pilot Randomized Controlled Trial

저자 : Kwang-bin An , Hye-joo Jeon , Woo-nam Chang

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 2호 발행 연도 : 2022 페이지 : pp. 181-187 (7 pages)

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PURPOSE: Respiratory function can be adversely affected after a cerebrovascular accident. This study aimed to determine whether inspiratory muscle training (IMT) changes the respiration and balance abilities of patients with stroke.
METHODS: Twelve patients with stroke were randomly assigned to the study (n=6) and control (n=6) groups. The study and control groups received IMT and general physical therapy, respectively for 6 weeks, five times a week for 30 min/day. Inspiratory and expiratory functions and balance were measured pre- and post-evaluation.
RESULTS: After IMT intervention, the weight distribution ratio (WDR) for balance ability measurement was significantly decreased (p<.05), and the maximum inspiratory pressure (MIP), maximum inspiratory flow rate (MIFR), maximum inspiratory capacity (MIC), peak expiratory flow (PEF), forced expiratory volume in 1 second (FEV1), and limits of stability (LOS) were significantly increased in the study group (p<.05). A comparison of the study and control groups revealed statistically significant differences in MIP (p<0.01), MIFR (p<.01), MIC (p<.05), PEF (p<.05), FEV1 (p<.05), WDR (p<.01), and LOS (p<.05).
CONCLUSIONS: This study suggests that IMT is a useful and effective exercise intervention for patients with stroke.

KCI등재 SCOPUS

6Effects of 4 Weeks of Beta-Alanine Intake on Inflammatory Cytokines after 10 km Long Distance Running Exercise

저자 : Su-yeon Jin , Hwang-woon Moon , Jun-su Kim , Ha-young Kim

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 2호 발행 연도 : 2022 페이지 : pp. 188-196 (9 pages)

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PURPOSE: This study aimed to examine the immunological effects of β-alanine intake for 4 weeks on immune function changes after long-distance exercise and the possibility of β-alanine intake as an effective exercise supplement to improve exercise performance and maintain immune function.
METHODS: Eighteen male college students were randomly assigned to two groups, one with two capsules of 250 mg β-alanine and the other with placebo without a nutritional effect. The participants took one capsule each in the morning and evening after the meals. This study was conducted in a double-blinded manner. To analyze the inflammatory cytokines expressed during exercise, a 10 km long-running exercise was performed, and blood was collected from the forearm vein a total of 4 times (at rest, immediately after exercise, 30 minutes, and 60 minutes in recovery).
RESULTS: As a result of analyzing the level of inflammatory cytokine IL-6, compared to the placebo group, the β-alanine intake group decreased significantly to 60 minutes after recovery from long-distance aerobic exercise, and both groups showed a significant difference between both periods (p<.001). However, there was no significant difference between the groups based on the measurement period before and after intake. As a result of analyzing the level of TNF-β, the expression of TNF-β in the placebo group was significantly decreased from immediately after long-distance aerobic exercise to 60 minutes after recovery, but in the β-alanine group, TNF-β expression did not occur immediately after exercise, and there was no significant difference until the recovery period; thus, there was no statistically significant difference between the two periods. In addition, there was no significant difference between the groups in terms of the measurement period before and after intake.
CONCLUSIONS: Based on the above results, β-alanine intake for 4 weeks is thought to be effective in maintaining temporarily reduced immune function after long-distance exercise by reducing the level of inflammatory cytokines in the study participants.

KCI등재 SCOPUS

7The Effects of External Vibration on Coordination Strategies of Multi-Muscles during Voluntary Isometric Torque Production

저자 : Jiseop Lee , Junkyung Song , Jaebum Park

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 2호 발행 연도 : 2022 페이지 : pp. 197-206 (10 pages)

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PURPOSE: To investigate the effect of muscle vibration on performance accuracy and multi-muscle coordination pattern during voluntary isometric knee extension torque production.
METHODS: The subjects were tested under two conditions of external vibration frequencies (90 Hz vibration (VIB)&no-vibration (NVIB)) with three levels of torque magnitudes of 20% (MVT20), 40% (MVT40), and 60% of maximal voluntary torque (MVT60). The subjects were instructed to perform a submaximal isometric ramp task and matched the produced torque with the torque template shown in the screen as accurately as possible. External vibration was applied to the rectus femoris (RF).
RESULTS: The performance error (RMSENORM) was reduced in 60% of MVT (MVT60) in both ramp and SS phases, and the iEMGAGO was significantly reduced by vibration under the same torque conditions in the SS phase. In addition, the muscle-mode (M-mode) composition was found to be different in the VIB and NVIB in the SS phase. We found that the VIB condition showed co-contraction M-modes and mixed M-modes. However, there was no significant difference in the ramp phase under all conditions.
CONCLUSIONS: The neurophysiological changes due to muscle vibration may positively affect the task characteristics and steps that require accurate torque generation and provide information for the quantitative understanding of multi-muscle coordination of vibration.

KCI등재 SCOPUS

8신장과 체중을 이용한 상대체중지수의 타당성 고찰

저자 : 박지용 ( Ji-yong Park ) , 권태원 ( Tae-won Gwon )

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 2호 발행 연도 : 2022 페이지 : pp. 207-214 (8 pages)

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PURPOSE: This study aimed to consider the validity of relative weight indices, which are used to compare people of different heights.
METHODS: Cross-sectional analyses were conducted using the 2017-2021 “National Fitness Award” in South Korea. Males (n=77,705) aged 18-65 years and females (n=84,641) were included. Three indices [I1=kg/m, I2=kg/㎡, and I3=kg/㎥] and I4 [I4=kg/㎡], which simply reduce the standard error of I1, were analyzed. Pearson's correlation analysis was conducted to determine an index that was highly correlated with weight and was independent of height. Furthermore, an index that was highly correlated with the body fat percentage was considered. The linear relationship between height and the indices was confirmed using regression analysis. The n value of the index (kg/mn), which provides the same value for all height ranges, was derived by regression analysis between weight and height.
RESULTS: The correlation analysis between height and the indices described I2 (r=-.009, p<.05) as the most suitable for males. The I1 and I4 (r=-.049, p<.01) were appropriate for females. Weight showed a significant correlation with all indices. The association between body fat percentage and I3 showed a high correlation in both males (r=.722, p<.01) and females (r=.734, p<.01). Regression analyses represented I2 (B=-.005, p<.05) suitability for males. For females, I4 (B=.022, p<.01) was replaceable.
CONCLUSIONS: The results of this study suggest that I2 (kg/㎡) is appropriate for males. The I4 (kg/㎡) was applicable to females. The I3 (kg/㎥) showed the strongest correlation with body fat percentage in both males and females.

KCI등재 SCOPUS

9서킷 형태의 근신경 운동이 MZ세대의 근력, 순발력, 기능적 수행력에 미치는 영향

저자 : 이광진 ( Kwang-jin Lee )

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 2호 발행 연도 : 2022 페이지 : pp. 215-221 (7 pages)

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PURPOSE: This study aimed to investigate the effects of circuit-type neuromuscular training (CTNT) on strength, power, and functional performance among the MZ generation.
METHODS: Twenty-eight participants were assigned to either the circuit-type neuromuscular training group (CTNTG, n=14) or the control group (CG, n=14). CTNT was performed for 50 minutes a day, 2-3 times a week, for 6 weeks. The CG only performed activities of daily living during the study period. Baseline and post measures included isometric muscular strength (knee flexion, knee extension, back flexion, back extension), vertical jump, 30 m sprint, T-agility, and Y-balance tests.
RESULTS: The results showed that the CTNT had a positive effect on the improvement of knee flexion (p=.015), knee extension (p=.047), back extension (p=.003), vertical jump (p=.025), T-agility (p=.046), posteromedial (p=.031), posterolateral (p=.022), and composite score (p=.032).
CONCLUSIONS: These findings can be a factor that the strength, power, and functional performance of MZ generation can be sufficiently improved through the CTNT program. This suggests that CTNT is the most appropriate exercise intervention method to improve the strength, power, and functional performance of the MZ generation.

KCI등재 SCOPUS

10자가근막이완을 포함한 동적 준비운동 프로그램이 연부조직의 강직도 및 운동수행능력에 미치는 영향

저자 : 선세영 ( Se-young Seon ) , 안근옥 ( Keun-ok An ) , 이광진 ( Kwang-jin Lee )

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 2호 발행 연도 : 2022 페이지 : pp. 222-229 (8 pages)

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PURPOSE: This study aimed to investigate the effect of dynamic warm-up (DW), including DW and self-myofascial release (SMFR), on soft tissue stiffness and exercise performance.
METHODS: Eight adult men participated in this study. The procedure was conducted twice every 2 weeks. Soft tissue stiffness measurements and exercise performance were performed as a pre-post-test. DW only and DW with SMFR were performed as an exercise intervention for the two groups, respectively.
RESULTS: In the group conducted solely by DW, the stiffness of the gastrocnemius and rectus femoris muscles increased (p<.05), and in the DW group including SMFR, the stiffness of the rectus femoris muscle (p<.01) and biceps femoris muscle increased (p<.05). The Achilles and patellar tendon showed no significant changes in either group. A significant increase was observed in both the DW group and the DW group containing SMFR in the 30 m sprint (p<.01). The vertical jump (VJ) showed no significant change in both groups.
CONCLUSIONS: Therefore, DW, including DW with SMFR, increased muscle stiffness, specifically through a 30-m sprint. In a follow-up study, it is considered necessary to investigate the effect of the VJ through the development of a DW program that changes the stiffness of tendons.

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KCI등재SCOUPUS

1휴먼헬스디지털테크놀로지 시대에서 운동과학의 역할

저자 : 이호성 ( Ho-seong Lee )

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 1호 발행 연도 : 2022 페이지 : pp. 1-3 (3 pages)

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2운동과학에서 Beta-Hydroxy-Beta-Methyl Butyrate 보충의 효과와 적용

저자 : 최은주 ( Eun-ju Choi )

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 1호 발행 연도 : 2022 페이지 : pp. 4-10 (7 pages)

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PURPOSE: The effect of hydroxymethylbutyrate (HMB) supplementation on leucine is a major area of interest in exercise science. The present review aimed to investigate the various effects of HMB supplementation and provide guidelines for its practical use.
METHODS: This review collected and analyzed previous studies on HMB supplementation from online databases including PubMed, Web of Science, and Wiley Online Library.
RESULTS: Although studies suggest different results, this review found that HMB supplementation before or after exercise could have positive effects on body composition (muscle mass), exercise performance (strength and power, endurance), and recovery after muscle damage (creatine kinase and lactate dehydrogenase). In particular, HMB supplementation had a significant effect on resistance exercise, and in general, a daily dose of 3 g is recommended. However, the effects of combined HMB and creatine supplementation remain unclear.
CONCLUSIONS: HMB can be a useful and effective supplement for athletes with various purposes and for ordinary people who regularly exercise. Further research should investigate several limitations of HMB supplementation, as suggested in previous studies.

KCI등재SCOUPUS

3Does Taekwondo Poomsae Training Impact on Body Composition, Physical Fitness, and Blood Composition in Children and Adolescents? A Systematic Review

저자 : Ye Lei , Hyung-pil Jun

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 1호 발행 연도 : 2022 페이지 : pp. 11-25 (15 pages)

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PURPOSE: Numerous studies claim that Taekwondo can effectively help obese children improve their physical fitness. In addition, Taekwondo might help prevent lifestyle diseases and metabolic syndrome caused by obesity. However, studies and reviews on the effectiveness of Taekwondo Poomsae are very few compared to those on Taekwondo Kyorugi. Based on previous reviews, this study aims to clarify the effect of Taekwondo Poomsae training on improving body composition, physical fitness, and blood composition of children and adolescents of different groups. Furthermore, the applicability of Taekwondo Poomsae training is to be determined.
METHODS: Two-hundred and two studies were searched via Korea electronic databases RISS, KISS, and DBPIA from March 1 to 3, 2021, and 22 of these were included in this review.
RESULTS: Our review confirms that Taekwondo Poomsae is effective in improving the physical condition of developing children and adolescents. However, we cannot assert that this sport is also an effective exercise therapy for special youth groups, such as those who are overweight, obese, or have a metabolic growth or development syndrome.
CONCLUSIONS: We suggest that sports implementers, Taekwando experts, coaches, and other sport professionals provide more Taekwondo Poomsae training programs suitable for physical and physiotherapeutic exercises for different ages and groups.

KCI등재SCOUPUS

4Effects of Resistance Training and/or Protein Supplementation on Usual Gait Speed in Postmenopausal Women: A Systematic Review and Meta-Analysis

저자 : Jae Ho Park , Junghwan Oh , Sok Park

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 1호 발행 연도 : 2022 페이지 : pp. 26-41 (16 pages)

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PURPOSE: The present review aimed to verify the meta-effects of resistance training (RT) or protein supplementation (PS) on usual gait speed (UGS) in postmenopausal women and the additive effect of RT and PS on UGS.
METHODS: A systematic literature search of PubMed/Medline and Web of Science (core collection) was performed from inception to December 31, 2021. Electronic search methods were used to identify 18 relevant randomized controlled trials. Meta-analyses of standardized mean difference (SMD) calculated using Hedges' g between RT and/or PS groups versus control groups were conducted using a random-effects model. The meta-effects are presented in a forest plot with a 95% confidence interval (CI).
RESULTS: The meta-analysis showed that RT significantly improved UGS (SMD, 0.40; 95% CI, 0.12-0.68; p=.006), while PS did not improve UGS (SMD, -0.17; 95% CI, -0.80 to 0.46; p=.601). A subgroup analysis indicated that there were significant increases in UGS after both 'RT-only intervention (SMD, 0.30; 95% CI, 0.01 to 0.59; p=.046)' and 'RT combined with balance training (BT) (SMD, 0.65; 95% CI, 0.17-1.13; p=.008)', while there was no significant increase in UGS after 'RT combined with power training (PT) (SMD, -0.08; 95% CI, -0.62 to 0.45; p=.765)'. There was no additive effect on UGS after RT combined with PS (SMD, -0.06; 95% CI, -0.36 to 0.24; p=.699).
CONCLUSIONS: This study revealed that RT significantly improved UGS in postmenopausal women, and adding BT to RT further improved UGS. In addition, there was no significant improvement in UGS after PS in postmenopausal women, and no additive effect on UGS after RT combined with PS.

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5유방암 환자의 범이론적 모델 단계에 따른 신체활동량과 운동 제약

저자 : 박하늬 ( Ha Nui Park ) , 연수진 ( Su Jin Yeon ) , 민지희 ( Ji Hee Min ) , 이정민 ( Jeong Min Lee ) , 정안숙 ( Ansuk Jeong ) , 김지예 ( Jee Ye Kim ) , 박형석 ( Hyung Seok Park ) , 김승일 ( Seung Il Kim ) , 전용관 ( Justin Y. Jeon )

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 1호 발행 연도 : 2022 페이지 : pp. 42-52 (11 pages)

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PURPOSE: The purpose of this study is to investigate the physical activity (PA) and exercise barriers of stages 0-3 breast cancer survivors according to the Transtheoretical Model (TTM).
METHODS: This cross-sectional study that included data from a total of 295 breast cancer survivors (Age: 52.2±8.2 years, BMI: 23.5±3.3 kg/㎡), at Shinchon Severance Hospital, Seoul, Korea. The levels of PA and exercise barriers according to TTM were investigated using questionnaires.
RESULTS: PA participation increased in the TTM stage. The proportion of participants categorized according to TTM stage differed according to the time since cancer diagnosis: a higher proportion of participants were in pre-contemplation/contemplation within one year after diagnosis, while a higher proportion of participants were in maintenance after three three years since diagnosis. The five most prevalent exercise barriers were fatigue, low level of physical fitness, poor health, lack of interest, and tendency to be physically inactive. Fatigue is the most prevalent exercise barrier regardless of TTM stage, while most exercise barriers tend to reduce as participants are in the preparation/action and maintenance stages.
CONCLUSIONS: In this study, we confirmed that the participants in the maintenance stage were the most active, while the proportion of participants in the TTM stage varied according to time since diagnosis. Since PA and exercise barriers vary according to the TTM stage, the TTM stage may increase PA participation in breast cancer patients.

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6양측 및 편측 신장성 운동이 근손상 및 근생리학적 지표에 미치는 영향

저자 : 박종연 ( Jong-yeon Park ) , 이호성 ( Ho-seong Lee )

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 1호 발행 연도 : 2022 페이지 : pp. 53-61 (9 pages)

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PURPOSE: This study aimed to determine the effects of bilateral and unilateral eccentric exercises on muscle damage and muscular physiological indices in healthy men.
METHODS: Using a randomized crossover design, nine adult males without musculoskeletal disorders were divided into a bilateral eccentric exercise group (BEG, n=9) and a unilateral eccentric exercise group (UEG, n=9). Bilateral and unilateral eccentric exercises involved five sets of six repetitions of the rhythm metronome speed eccentric contraction 3 seconds at 110% one repetition maximum (1RM) using bilateral of BEG and the dominant and non-dominant of UEG separated by four weeks, respectively. Muscle damage (flexed and extended ROM, CIR, and VAS) and muscular physiological indices (muscle activity, muscle fatigue, and muscle tone) were measured before, immediately after (0 hour), 24, 48, 72, and 96 hours following bilateral and unilateral eccentric exercises.
RESULTS: The flexed ROM, CIR, VAS, muscle activity, and muscle tone were significantly increased after both bilateral and unilateral eccentric exercises (p<.05, respectively). Extended ROM and muscle activity significantly decreased after both bilateral and unilateral eccentric exercises (p<.05, respectively). However, there was no significant interaction between side (S) and time and side (T×S).
CONCLUSIONS: These results showed that there was no difference in muscle damage and physiological indices after measuring and setting the 1RM muscle strength separated by bilateral and unilateral eccentric exercises.

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7위드 코로나 시대 8주간의 온라인 고강도 인터벌 트레이닝이 과체중 남성의 신체조성, 혈중지질, 사이토카인 및 삶의 질에 미치는 영향

저자 : 최동훈 ( Dong-hun Choi ) , 현아현 ( Ah-hyun Hyun )

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 1호 발행 연도 : 2022 페이지 : pp. 62-71 (10 pages)

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PURPOSE: The purpose of this study is to investigate the effect of high-intensity interval training (HIIT), using real-time video application programs, on the body composition, blood lipids, cytokines, and quality of life (QOL) of over-weight men.
METHODS: The participants of this study were overweight men, aged < 45 years, who voluntarily applied to the online notices for this study. The men had a body mass index (BMI) >28. Twenty people participated in this experiment and were divided into two groups: a HIIT group (n=10) and a control group (n=10). Both groups were pre-examined to determine body composition, dual-energy X-ray absorptiometry, and QOL indices and also underwent blood tests. The HIIT group underwent high-intensity interval training for 8 weeks (twice a week and 35 minutes per day) using real-time video programs. The main exercise program for HIIT was 20 seconds high-intensity (85-90% HRmax) exercise followed by 30 seconds exercise at a 60% HRmax.
RESULTS: Comparison and analysis of the effects observed before and after the exercise revealed that the real-time online HIIT group showed reduced body fat (F=5.690, p=.028). Results of the blood tests showed that the high-density lipoprotein cholesterol (HDL; F=24.584, p=.001) was increased, while the low-density lipoprotein cholesterol (LDL; F=24.963, p=.001), triglycerides (TG; F=7.295, p=.015;), and total cholesterol (TC; F=14.934, p=.001) levels were decreased. No significant effects were observed on the insulin and c-reactive protein (CRP) levels. Finally, the QOL test results showed that the total score of the HIIT group had increased (F=190.815, p=.001).
CONCLUSIONS: Online HIIT is a useful method that aids in reducing fat levels in obese men and improving their blood lipid profile and QOL during the COVID-19 pandemic.

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8Changes in Heart Rate, Muscle Temperature, Blood Lactate Concentration, Blood Pressure, and Fatigue Perception Following Jogging and Running: An Observational Study

저자 : Junhyeong Lim , Hyeongjun Park , Seunghee Lee , Jihong Park

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 1호 발행 연도 : 2022 페이지 : pp. 72-79 (8 pages)

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PURPOSE: To report the magnitude of changes in heart rate, muscle temperature, blood lactate concentration, blood pressure, and fatigue perception after treadmill jogging and running.
METHODS: Eleven healthy male adults (174±7 cm, 72±10 kg) visited the laboratory twice. After a 10-minute rest each visit, subjects performed a treadmill jog (maintaining a speed of 9 km/h at a 1% incline) or a treadmill run (initially 5 km/h at a 1% incline, belt speed, and incline increased by 1 km/h and 0.5% every minute; average speed of 9 km/h). Heart rate and muscle (gastrocnemius) temperature were recorded before, during, and after the treadmill jog/run. Blood lactate concentration, blood pressure, and fatigue perception were assessed before and after. The effect of the condition over time was analysed using parametric or nonparametric tests (p≤.05) with Cohen's d effect sizes.
RESULTS: There was a condition effect over time in heart rate (F1,30=22.16, p<.0001), blood lactate concentration (χ2=34.88, df=3, p<.0001), systolic blood pressure (F1,30=4.18, p=.05), and fatigue perception (F1,30=10.24, p=.003). Specifically, subjects who ran showed a higher heart rate (187 vs. 158 bpm, p<.0001, d=2.11), blood lactate concentration (11.4 vs. 3.8 mmol/L, p<.0001, d=3.39), systolic blood pressure (164 vs. 147 mmHg, p=.006, d=1.34), and fatigue perception (2.7 vs. 5.0 cm, p=.0005, d=1.46) than those who jogged. There was a time effect (F1,30=94.84, p<.0001) on muscle temperature, with a 1.5°C increase in muscle temperature after jogging/running (p<.0001, d=1.88).
CONCLUSIONS: While treadmill jogging and running induced a similar temperature increase in the gastrocnemius, running resulted in higher heart rate, blood lactate concentration, systolic blood pressure, and fatigue perception. These results can be used as a basis for planning warm-up protocols.

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9여성 노인의 낙상과 비낙상의 보행변인 비교 및 평지와 장애물 보행 중 보행속도에 따른 낙상여부의 비교위험도

저자 : 강현주 ( Hyun-joo Kang ) , 이병근 ( Byung-kun Lee )

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 1호 발행 연도 : 2022 페이지 : pp. 80-87 (8 pages)

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PURPOSE: The purpose of this study was to compare the gait variables and the relative risk of falling between elderly Korean women that fall and do not fall based on the walking speed during flat walking and in the presence of obstacles.
METHODS: The study included 148 women, aged 65 years or older (22 fallers, aged 75.05±5.38 years; 126 non-fallers, aged 71.80±5.14 years). The gait variables were measured in a space of 9 m×1 m, and obstacle walking was measured while crossing obstacles measuring, 5 cm and 30 cm. A t-test, correlation analysis, and logistic regression analysis were performed to compare the gait variables to determine if there was a fall and to analyze the relationship and the risk ratio of a fall at a walking speed.
RESULTS: Out of 148 participants, 22 participants (14.9%), fell while walking. During flat ground walking, right step length (p<.01) left step length (p<.05), and stride lengths (p<.01) were smaller in the faller group, while the stance phase (p<.01) and double-support time ratio (p<.05) were smaller in the non-faller group. In obstacle walking, slower walking speeds were observed for the 5-cm obstacles (p<.01) and 30-cm obstacles (p<.05) in the faller group. For the low-speed and medium-high speed groups, the odds ratio of the fall experience was 2.844 (1.125-7.191) (p<.05) for flat gait, 3.585 (1.354-9.491) (p<.05) for the 5 cm obstacle, and 4.877 (1.731- 13.742) (p<.01) for the 30 cm obstacle. As the height of the obstacle increased, the fall odds ratio increased.
CONCLUSIONS: In the faller group, the step and stride lengths were smaller during flat walking, and the walking speed of the obstacles was low. The low-speed group had a high falling experience odds ratio, and as the height of the obstacle increased, the falling experience odds ratio increased.

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10웨이트 트레이닝 전 자가근막이완 기법이 기능적 움직임과 지연성 근육통에 미치는 효과

저자 : 이미래 ( Mi-rae Lee ) , 김종희 ( Jong-hee Kim )

발행기관 : 한국운동생리학회 간행물 : 운동과학 31권 1호 발행 연도 : 2022 페이지 : pp. 88-97 (10 pages)

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PURPOSE: This study aimed to examine the effect of the self-myofascial release technique conducted before weight training on functional movement and delayed onset muscle soreness (DOMS).
METHODS: The study subjects were divided into three groups: a control group (CON, n=8), an active stretching group (DS, n=8), and a self-myofascial release group (SMR, n=8). All three groups performed the same leg press exercise program for 30 minutes, twice a week for eight weeks. Active stretching and self-myofascial release techniques were conducted before exercise for 30 minutes. Body composition, 1RM, and functional movement screen (FMS) were tested before the 1st-week exercise and after the 4th- and 8th-week exercise training. The DOMS levels were assessed immediately after exercise and at 24, 48, and 72 hours post-exercise using the visual analog scale (VAS).
RESULTS: Body weight and body fat percentage showed a significant decrease (p<0.01), and muscle mass and 1RM increased with the exercise period (p<0.01). The FMS score differed between the groups (p<0.05), periods (p<0.01), and groups×periods (p<0.01). The FMS score was significantly higher in the SMR than in the CON group at the 4th- and 8th-week exercise. The exercise-induced VAS level peaked at 48 hours post-exercise in all groups and significantly decreased at 72 hours post-exercise in the SMR group.
CONCLUSIONS: These results indicate that self-myofascial release positively affects functional movements and effectively alleviates exercise-induced pain levels. Therefore, self-myofascial release techniques could be used as an effective warm-up strategy to improve physical function and relieve exercise-induced injury and muscle pain.

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