간행물

운동과학 update

Official Journal of the Korea Exercise Science Academy

  • : 한국운동생리학회
  • : 예체능분야  >  체육학
  • : KCI등재
  • : SCOPUS
  • : 연속간행물
  • : 계간
  • : 1226-1726
  • : 2384-0544
  • : 한국운동과학회(~1995) → 운동과학(1996~)

수록정보
30권4호(2021) |수록논문 수 : 16
간행물 제목
31권2호(2022년 05월) 수록논문
최근 권호 논문
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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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KCI등재 SCOPUS

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

1Emerging Era of Exercise Genomics

저자 : Seung Kyum Kim

발행기관 : 한국운동생리학회 간행물 : 운동과학 30권 4호 발행 연도 : 2021 페이지 : pp. 407-411 (5 pages)

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2앞십자인대 손상 예방을 위한 근신경 훈련의 최신 경향: 문헌 고찰

저자 : 이광진 ( Kwang-jin Lee ) , 안근옥 ( Keun-ok An )

발행기관 : 한국운동생리학회 간행물 : 운동과학 30권 4호 발행 연도 : 2021 페이지 : pp. 412-418 (7 pages)

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PURPOSE: Anterior cruciate ligament (ACL) injuries are the most common in sports and have doubled in the past 20 years. This study aimed to analyze the latest trends and changes in training programs for ACL injury prevention.
METHODS: In this study, literature was searched using academic search sites, such as 'PubMed', 'Google Scholar', and 'Wiley Online Library'. The literature published between 2015 and 2021 was used.
RESULTS: Eleven papers were selected based on the literature selection criteria. Five warm-up exercise papers and six ACL injury prevention training program papers emphasized neuromuscular training.
CONCLUSIONS: The ACL injury prevention program can be applied in warm-up exercises and training programs. It consists of an exercise form that includes multidimensional components such as plyometrics, muscle strength, balance, and agility. The key to the ACL injury prevention program is to reflect multidimensional components in neuromuscular training and to obtain a significant effect, and it is recommended to participate in regular training for 12-18 sessions and at least 6 months. In addition, it is suggested to utilize the ACL injury prevention program presented in this study until an individual study for ACL injury prevention by sports type is conducted.

KCI등재SCOUPUS

3비만 노쇠와 복합 운동

저자 : 이해성 ( Hae Sung Lee ) , 김종희 ( Jong-hee Kim )

발행기관 : 한국운동생리학회 간행물 : 운동과학 30권 4호 발행 연도 : 2021 페이지 : pp. 419-431 (13 pages)

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PURPOSE: Frailty is a geriatric syndrome that impairs the health and quality of life of older adults. While unintended weight loss is known to be a primary risk factor for frailty, obesity has also been closely associated with frailty. Combined exercise is thought to be an effective way of resolving obesity and frailty, but studies demonstrating the effect of combined exercise on obese frailty are lacking. In this review, we seek to understand the relevant mechanisms by exploring prior studies on obese frailty, and provide the implications of appropriate combined exercise interventions for obese frailty.
METHODS: To collect data for this study, we used academic search systems such as Scopus, Google Scholar, PubMed, and Web of Science. The keywords used for the search were a combination of words such as 'obesity', 'frailty', 'combined or multicomponent exercise', and 'older or elderly adults'.
RESULTS: The results from the 16 selected articles confirmed that combined exercise reduces body weight, percentage of body fat, and risk of falls. Moreover, it improves muscle strength, balance, and walking function of the obese frail population.
CONCLUSIONS: As we have confirmed the positive outcomes on the combined exercise for obese frail older adults, an optimal exercise program needs to be presented. Older adults with obesity are recommended to exercise at least 2-3 times a week during the initial period. Further, they should begin with low-intensity walking, full-body exercise, balance, and flexibility exercises, then gradually increase the exercise volume. Moreover, to facilitate the positive outcomes of physical training and to encourage autonomy and enjoyment of exercise among obese frail older adults, a novel method and an individualized scientific exercise program need to be developed.

KCI등재SCOUPUS

4유방암 환자의 인지 손상에 미치는 운동 효과: 메타분석적 접근

저자 : 은홍범 ( Hong-bum Eun ) , 백성수 ( Seung-soo Baek )

발행기관 : 한국운동생리학회 간행물 : 운동과학 30권 4호 발행 연도 : 2021 페이지 : pp. 432-443 (12 pages)

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PURPOSE: Cancer-related cognitive impairment (CRCI) is exposed to cognitive impairments that interfere with their daily lives after a complete recovery. Exercise is one of the effective non-pharmacological treatments to prevent or improve cognitive function decline. This study evaluated the effects of exercise interventions on cognitive function improvement in CRCI breast cancer patients and searched the association of various aspects in which exercise affects cognitive function improvement.
METHODS: PubMed, ScienceDirect, ACS journal, and Google scholar databases from 1 January 2014 to 31 May 2021 were utilized for searching articles related to research purpose. Meta-analysis was conducted with Comprehensive Meta-Analysis 2.0 using the random-effect model.
RESULTS: A meta-analysis of seven studies showed that walking (ES=0.59, p=.000) was the most effective in improving cognitive function, and moderate-intensity (ES=0.60, p=.000) was more effective than moderate-to-high intensity (ES=0.27, p=.007) exercise in CRCI patients with breast cancer. Cognitive function improvement was observed in short-term exercise intervention for four weeks (ES=0.46, p=.038), and after that, it was found that the cognition improvement effect was maintained or improved through long-term (12 or 24 weeks) exercise. Moreover, the cognitive function of CRCI patients with breast cancer improved without supervision during exercise interventions (ES=0.39, p=.001).
CONCLUSIONS: Walking and moderate-intensity exercise can suppress cognitive impairment in CRCI patients with breast cancer. Personalized exercise prescription through short-term and long-term exercise periods can alleviate cognitive decline and improve the cognitive function of CRCI breast cancer patients. Exercise interventions without supervision also show a positive influence on cognitive function improvement.

KCI등재SCOUPUS

5Differential Gene Expression in Cell Types of the Human Skeletal Muscle: A Bioinformatics-Based Meta-Review

저자 : Kyung-wan Baek , So-jeong Kim , Ji-seok Kim , Sun-ok Kwon

발행기관 : 한국운동생리학회 간행물 : 운동과학 30권 4호 발행 연도 : 2021 페이지 : pp. 444-452 (9 pages)

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PURPOSE: This study evaluates the differences in the expression of genes frequently analyzed in the field of exercise science between the skeletal muscle tissue and various cell types that comprise the skeletal muscle tissue.
METHODS: We summarized the genes and proteins expressed in the skeletal muscle that were published in “Exercise Science” journal from 2015 to present. Thereafter, we selected 15 genes and proteins that were the most analyzed genes and proteins in the skeletal muscle. These genes and proteins were horizontally compared for expression differences in skeletal muscle components and cultured cells based on NCBI Gene Expression Omnibus DataSets.
RESULTS: The most analyzed genes (encoding analyzed proteins) in skeletal muscle tissues in “Exercise Science” were PPARGC1A, PPARD, MTOR, MAP1LC3A, MAP1LC3B, PRKAA1, AKT1, SLC2A4, MAPK1, COX4I1, MAPK14, MEF2A, MAPK8, RPS6KB1, and SOD1. Among them, PPARGC1A, AKT1, SLC2A4, MAPK1, and COX4I1 were specifically expressed in the skeletal muscle. However, expression of other genes was found to be significantly affected in other cell types of the skeletal muscle tissue.
CONCLUSIONS: Genes such as PPARGC1A, which are specifically expressed in the skeletal muscle, may be analyzed without pretreating (such as perfusion) the skeletal muscle tissue. However, expression of other genes may depend on the skeletal muscle cell type. Thus, in such instances, pretreatment, such as perfusion and isolation, should be considered.

KCI등재SCOUPUS

6국소 부위 고온 및 저온 스트레스가 안정 시 및 운동 시 온냉감 민감도 및 중성역에 미치는 영향

저자 : 김대환 ( Dae-hwan Kim ) , 한진희 ( Jean-hee Han ) , 장민혁 ( Min-hyeok Jang ) , 김정현 ( Jung-hyun Kim )

발행기관 : 한국운동생리학회 간행물 : 운동과학 30권 4호 발행 연도 : 2021 페이지 : pp. 453-461 (9 pages)

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PURPOSE: The primary objective of this study was to investigate the effects of local cold and heat stimuli on cutaneous thermal sensitivity and inter-threshold zone at rest and during exercise.
METHODS: Cutaneous warm and cold thresholds were measured on two body regions (forehead and hand) in three types of local thermal stress environments (neutral, heat, cold) using a method of limit in sixteen young, healthy male subjects (25.44±2.28 years) at rest and during exercise.
RESULTS: The results showed that the thermal inter-threshold zone was wider on the hand than on the forehead under thermal stress conditions at rest and during exercise. The thermal inter-threshold zone on both body regions widened with exercise (p<.05). Exercise significantly blunted both the warm and cold sensitivity in the forehead (p<.05), but only cold sensitivity in the hand (p<.05). Moreover, the thermal inter-threshold zone on both the forehead and hand became significantly wider when heat or cold stress was applied to the local body region (p<.001). In the forehead, warm and cold sensitivity were significantly blunted in both heat and cold stress environments (p<.05), whereas in the hard they were significantly blunted only in the heat stress environment (p<.01).
CONCLUSIONS: In conclusion, the present study showed that the forehead is more sensitive to both warm and cold stimuli than the hand, regardless of thermal stress or exercise. Furthermore, the thermal inter-threshold zone on both the forehead and the hand widened with exercise and local thermal stimuli.

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7중년 남성의 신체활동량과 형태가 백혈구 텔로미어 길이에 미치는 영향

저자 : 신윤아 ( Yun-a Shin ) , 김창선 ( Chang-sun Kim ) , 이상현 ( Sang-hyun Lee ) , 이용우 ( Yong-woo Lee ) , 김준수 ( Jun-soo Kim ) , 박동호 ( Dong-ho Park )

발행기관 : 한국운동생리학회 간행물 : 운동과학 30권 4호 발행 연도 : 2021 페이지 : pp. 462-471 (10 pages)

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PURPOSE: Leukocyte telomere length (LTL) is a potential indicator of cellular senescence. However, its relationship with the type and volume of regular exercise is unclear. Therefore, we investigated the effects of the type and volume of long-term regular exercise on the LTL in middle-aged men (N=109, mean age=44.7±4.1 years [range: 40-56 years]).
METHODS: For all participants, the volume of physical activity (PA) was evaluated using a self-report questionnaire, and blood samples were collected simultaneously. We cross-sectionally examined the associations among the type and volume of PA, LTL, telomerase activity (TA), mitochondrial DNA copy number (mtDNA), and body composition in three groups: 1) bodybuilders (BBs) with at least 5 years of athletic experience (n=36, mean age: 42.3±3.3 years [40-51 years]), 2) cyclists (CCs) with an athletic career similar to that of the BBs (n=37, mean age: 45.4±4.4 years [range: 40-53 years]), and 3) healthy ordinary people (CON; n=36, mean age: 46.3±3.3 years [range: 40-56 years]).
RESULTS: The LTL showed a significant positive correlation with the volume of PA (r=.285, p=.003), regardless of the type of PA. Furthermore, the LTLs were longer in the BB (p=.007) and CC (p=.003) groups (who performed moderate-to-vigorous PA for 150 minutes or more per week) than in the CON group. Conversely, the TA was significantly higher in the BB group (p=.009) than in the CON group; however, it only tended to be high in the CC group (p=.115). There were no intergroup differences in both the mtDNA (p=.127) and 8-hydroxydeoxyguanosine (p=.289) levels.
CONCLUSIONS: The TA was found to increase, and thus prevent telomere loss, in middle-aged men who performed PA of moderate-to-vigorous intensity, regardless of the PA type.

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8소변배출, 유산소 운동, 음식 및 물섭취가 생체전기 저항법을 이용한 신체조성측정에 미치는 영향

저자 : 조채은 ( Chaeeun Cho ) , 이세원 ( Sewon Lee )

발행기관 : 한국운동생리학회 간행물 : 운동과학 30권 4호 발행 연도 : 2021 페이지 : pp. 472-480 (9 pages)

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PURPOSE: Body composition is strongly associated with cardiometabolic risk factors, and accurate measurement of body composition is vital for the management of chronic diseases. In this study, we assessed whether major factors such as urination, aerobic exercise, food, and water consumption had significant effects on body composition by segmental bioelectrical impedance analysis (BIA).
METHODS: To achieve the goal of this study, research was conducted on 32 healthy young males (n=18) and females (n=14). All participants underwent body composition analysis in four different conditions (both pre- and post-urination, moderate-intensity aerobic exercise for 30 minutes, immediately after food and water consumption, 30, 60, and 120 minutes after each treatment), and segmental BIA was performed using Inbody720.
RESULTS: We found that after urination, body weight, skeletal muscle mass, and basal metabolic rate (BMR) significantly decreased. However, water intake significantly increased body weight, body fat mass, and body fat percentage. Furthermore, an acute 30-minutes aerobic exercise significantly decreased body weight, fat mass, and fat percentage, and increased skeletal muscle mass and BMR. In addition, impedance decreased immediately and increased 120 minutes after the acute aerobic exercise. Finally, food ingestion significantly increased the body weight, skeletal muscle mass, and BMR.
CONCLUSIONS: Our study suggests that variables such as urination, exercise, food consumption, and water intake should be considered to accurately assess body composition.

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9폐 기능 및 운동수행력 증진을 위한 비 확장기의 효용성

저자 : 김동규 ( Dong-kyu Kim ) , 김맹규 ( Maeng-kyu Kim )

발행기관 : 한국운동생리학회 간행물 : 운동과학 30권 4호 발행 연도 : 2021 페이지 : pp. 481-490 (10 pages)

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PURPOSE: This study aimed to examine changes in pulmonary function induced by an internal nasal dilator (IND) and to determine whether an IND enhances exercise performance.
METHODS: Young, healthy men (n=13) were randomly assigned either an IND or control (CON) session to perform a pulmonary function test (PFT). All participants then completed treadmill exercise tests that consisted of maximal and submaximal running with or without an IND.
RESULTS: Some variables of PFTs were increased in men that used INDs compared to those in the CON group (p<.05, respectively). There was a significant difference between sessions in energy cost during the running test (65% VO2max) (p<.05). In the IND group, respiratory muscle fatigue during exercise was lower, and relaxation of respiratory muscles after exercise was faster, as compared with the CON group (p<.05).
CONCLUSIONS: IND may contribute to improvements in pulmonary function. Furthermore, INDs may reduce energy costs and respiratory muscle fatigue during submaximal exercise by maintaining nasal breathing and facilitating respiratory muscle relaxation after maximal exercise tests.

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10Acute Effects of Foam Rolling Exercises on Arterial Stiffness, Flexibility and Autonomic Nervous System Function in Young and Middle-Aged Women

저자 : Cheonok Lee , Sewon Lee

발행기관 : 한국운동생리학회 간행물 : 운동과학 30권 4호 발행 연도 : 2021 페이지 : pp. 491-500 (10 pages)

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PURPOSE: Arterial stiffness is an independent risk factor for cardiovascular disease and inversely associated with flexibility. Self-myofascial release (SMR) using a foam roller is a popular intervention to improve flexibility, restore the muscles, fascia, tendons, and ligaments, and regain soft-tissue extensibility. This study aimed to investigate whether a single bout of SMR has a beneficial effect on arterial stiffness and the function of the autonomic nervous system and the relationships among these variables in young and middle-aged women by age.
METHODS: Ten healthy young (23.20±0.59 years) and 10 middle-aged women (44.50±0.91 years) completed an instructed SMR using a foam roller. Brachial-ankle pulse wave velocity (baPWV), augmentation index (AIx), trunk flexibility, shoulder flexibility, heart rate variability, including standard deviation of normal R-R intervals (SDNN), and the root mean square of the standard deviation of the time between heartbeats (RMSSD) were measured before and after one 30-minutes bout of SMR.
RESULTS: After one bout of SMR, trunk and shoulder flexibility increased in both groups of women, while AIx decreased significantly (from 6.9±2.9 to -1.9±4.6%, p=.0072, young women group; from 22.1±3.4 to 14.7±1.7%, p=.0049, middle-aged women group). However, the baPWV, RMSSD, and SDNN did not change. In the analysis of correlations between all measured variables, changes in AIx showed negative correlations with flexibility and SDNN.
CONCLUSIONS: This study suggests that one bout of SMR using a foam roller positively affected arterial stiffness in women by reducing AIx and improving flexibility.

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