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한국운동영양학회> JENB (Journal of Exercise Nutrition & Biochemistry)

JENB (Journal of Exercise Nutrition & Biochemistry) update

  • : 한국운동영양학회
  • : 자연과학분야  >  가정
  • : KCI등재
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  • : 연속간행물
  • : 계간
  • : 2233-6834
  • : 2233-6842
  • : 운동영양학회지(~2011)→JENB (Journal of Exercise Nutrition & Biochemistry)(2011~)

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수록범위 : 1권1호(1997)~23권2호(2019) |수록논문 수 : 672
JENB (Journal of Exercise Nutrition & Biochemistry)
23권2호(2019년 06월) 수록논문
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1Acid sphingomyelinase inhibition alleviates muscle damage in gastrocnemius after acute strenuous exercise

저자 : Young-ik Lee , Yea-hyun Leem

발행기관 : 한국운동영양학회 간행물 : JENB (Journal of Exercise Nutrition & Biochemistry) 23권 2호 발행 연도 : 2019 페이지 : pp. 1-6 (6 pages)

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[Purpose] Strenuous exercise often induces skeletal muscle damage, which results in impaired performance. Sphingolipid metabolism contributes to various cellular processes, including apoptosis, stress response, and inflammation. However, the relationship between exercise-induced muscle damage and ceramide (a key component of sphingolipid metabolism), is rarely studied. The present study aimed to explore the regulatory role of sphingolipid metabolism in exercise- induced muscle damage.
[Methods] Mice were subjected to strenuous exercise by treadmill running with gradual increase in intensity. The blood and gastrocnemius muscles (white and red portion) were collected immediately after and 24 h post exercise. For 3 days, imipramine was intraperitoneally injected 1 h prior to treadmill running.
[Results] Interleukin 6 (IL-6) and serum creatine kinase (CK) levels were enhanced immediately after and 24 h post exercise (relative to those of resting), respectively. Acidic sphingomyelinase (A-SMase) protein expression in gastrocnemius muscles was significantly augmented by exercise, unlike, serine palmitoyltransferase-1 (SPT- 1) and neutral sphingomyelinase (N-SMase) expressions. Furthermore, imipramine (a selective A-SMase inhibitor) treatment reduced the exercise-induced CK and IL-6 elevations, along with a decrease in cleaved caspase-3 (Cas-3) of gastrocnemius muscles.
[Conclusion] We found the crucial role of A-SMase in exercise-induced muscle damage.

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2Curcumin supplementation attenuates the decrease in endothelial function following eccentric exercise

저자 : Youngju Choi , Yoko Tanabe , Nobuhiko Akazawa , Asako Zempo-miyaki , Seiji Maeda

발행기관 : 한국운동영양학회 간행물 : JENB (Journal of Exercise Nutrition & Biochemistry) 23권 2호 발행 연도 : 2019 페이지 : pp. 7-12 (6 pages)

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[Purpose] Eccentric exercise induces a decrease in vascular endothelial function. Curcumin, a major component of turmeric, has potent antioxidant and anti-inflammatory properties that are associated with vascular protective effects. The present study examined the effect of acute supplementation of curcumin on eccentric exercise-induced endothelial dysfunction in healthy young men.
[Methods] Fourteen healthy sedentary young men (range, 21-29 years) were assigned to either the curcumin (n = 6) or placebo (n = 8) group. All subjects consumed either curcumin or placebo before exercise, and eccentric exercise of the elbow flexors was performed with their nondominant arm. Before and 60 min after exercise, brachial artery flow-mediated dilation (FMD), as an indicator of endothelial function, was measured in the non-exercised arm.
[Results] Brachial artery FMD significantly decreased following eccentric exercise (p < 0.05) in the placebo group, but acute supplementation with curcumin before exercise nullified this change. The change in FMD before and after eccentric exercise between the placebo and curcumin groups was significantly different (p < 0.05).
[Conclusion] The present study found that acute curcumin supplementation could attenuate the decrease in endothelial function, as measured by FMD, following eccentric exercise in healthy young men.

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[Purpose] Functional beverages are a protective or enhancing factor influencing not only public health but also athletic performance. The purpose of this study was to highlight the new conditioning beverage of the Lactobacillus pentosus strain b240 (B240) with electrolytes or proteins, which strengthens immune functions to improve the quality of life.
[Methods] ISeveral related studies systematically reviews three main issues associated with conditioning beverages: (a) utilization and availability of the functional beverage; (b) significance of B240 in immune strengthening; and (c) availability and application of conditioning drinks in the daily life and sports field.
[Results] Intake of B240 led to greater enhancements, including blood T-helper, NK cell, IgA and IgG level in conjunction with strengthen immune func-tions. These results speculated that the practical application of B240 contained beverages on physiological health and performance.
[Conclusion] BODYMAINTÉ, this novel conditioning beverage is expected biological utility responsible for improved sports performance as a functional drink and has potential health-related implications.

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4Comparison of association between physical activity and resting metabolic rate in young and middleaged Korean adults

저자 : Hyejung Hwang , Won-sang Jung , Jisu Kim , Hun-young Park , Kiwon Lim

발행기관 : 한국운동영양학회 간행물 : JENB (Journal of Exercise Nutrition & Biochemistry) 23권 2호 발행 연도 : 2019 페이지 : pp. 16-21 (6 pages)

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[Purpose] The purpose of this study was to comparatively investigate the correlation among body composition, resting metabolic rate (RMR), and physical activity (PA) between young and middle-aged Korean adults.
[Methods] A total of 53 [male n=23, female n=30] subjects were included in this study, among whom 34 subjects were healthy young adults [male n=18, female n=16] and 19 were middle-aged adults [male n=5, female n=14]. The body composition and RMR of all the participants were measured after overnight fasting (≥8 h). The Korean version of the WHO Global Physical Activity Questionnaire (GPAQ) was used to assess physical activity.
[Results] Body composition was not significantly different between young adults and middle-aged adults. Whole-body bone mineral density and bone mineral contents (BMC) were significantly lower in middle-aged adults than in young adults. Total blood cholesterol (TC) and blood glucose levels were significantly higher in middle-aged adults (TC; 195.21 ± 43.34, glucose; 103.57 ± 12.61 mg/dL) than in young adults. RMR was significantly lower in middle-aged adults (1619.57 ± 290.28 kcal/day) than in young adults (1894.37 ± 405.00 kcal/day). In middle-aged adults physical activity (PA). PA (METs, min, EE) was inversely correlated with fat mass (FM, kg, and %) and blood triglyceride (TG) level in young adults. In middle-aged adults, PA showed a significant positive correlation with lean body mass (LBM), FM (%), and RMR. Furthermore, PA EE showed significant interrelatedness with BMC among middle-aged adults.
[Conclusion] These results demonstrated that high PA levels enable LBM and RMR maintenance in middle- aged adults. Furthermore, in young adults, more PA is required to induce change in body composition.

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5Comparison of excess post-exercise oxygen consumption of different exercises in normal weight obesity women

저자 : Won-sang Jung , Hyejung Hwang , Jisu Kim , Hun-young Park , Kiwon Lim

발행기관 : 한국운동영양학회 간행물 : JENB (Journal of Exercise Nutrition & Biochemistry) 23권 2호 발행 연도 : 2019 페이지 : pp. 22-27 (6 pages)

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[Purpose] The purpose of this study was to compare the excess post-exercise oxygen consumption (EPOC) between different types of exercises in women with normal weight obesity (NWO).
[Methods] Nine university students with NWO having body mass index < 25 kg/m2 and body fat percentage >30% participated in the study. First, continuous exercise (CEx) on an ergometer for 30 minutes at 60% of maximal oxygen consumption (VO2max) and interval exercise (IEx) at 80% VO2max for 2 minutes were performed. This was followed by exercise performed at 40% VO2max for 1 minute and at 80% VO2max for 3 minutes, performed 6 times repeatedly for a total of 26 minutes. The accumulation of short duration exercise (AEx) was performed for 3-bouts of 10 minutes each at 60% VO2max.
[Results] The major findings were as follows: energy consumption during the exercises showed no significant difference between CEx, IEx, and AEx; EPOC was higher in IEx and AEx as compared to CEx for all dependent variables (e.g. total oxygen consumption, total calorie, summation of heart rate, and EPOC duration); and the lipid profile showed no significant difference.
[Conclusions] Our study confirmed that when homogenizing the energy expenditure for various exercises in NWO individuals, EPOC was higher in IEx and AEx than in CEx. Therefore, IEx and AEx can be considered as effective exercise methods for increasing energy expenditure in NWO females.

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6Potential role of exercise-induced glucose-6-phosphate isomerase in skeletal muscle function

저자 : Seong Eun Kwak , Hyung Eun Shin , Di Di Zhang , Jihyun Lee , Kyung Jin Yoon , Jun Hyun Bae , Hyo Youl Moon , Wook Song

발행기관 : 한국운동영양학회 간행물 : JENB (Journal of Exercise Nutrition & Biochemistry) 23권 2호 발행 연도 : 2019 페이지 : pp. 28-33 (6 pages)

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[Purpose] Recent studies have shown that glucose- 6-phosphate isomerase (GPI)―which is a glycolysis interconversion enzyme―reduces oxidative stress. However, these studies are limited to tumors such as fibrosarcoma, and there are no studies that have examined the effects of exercise on GPI expression in mice skeletal muscle. Furthermore, GPI acts in an autocrine manner thorough its receptor, autocrine motility factor receptor (AMFR); therefore, we investigated expression level changes of secreted GPI from skeletal muscle in in vitro study to examine the potential role of GPI on skeletal muscle.
[Methods] First, we performed an in vitro study, to identify the condition that upregulates GPI levels in skeletal muscle cells; we treated C2C12 muscle cells with an exercise-mimicking chemical, AICAR. AICAR treatment upregulated GPI expression level in C2C12 cell and its secretomes. To confirm the direct effect of GPI on skeletal muscle cells, we treated C2C12 cells with GPI recombinant protein.
[Results] We found that GPI improved the viability of C2C12 cells. In the in vivo study, the exercise-treated mice group showed upregulated GPI expression in skeletal muscle. Based on the in vitro study results, we speculated that expression level of GPI in skeletal muscle might be associated with muscle function. We analyzed the association between GPI expression level and the grip strength of the all mice group. The mice group's grip strengths were upregulated after 2 weeks of treadmill exercise, and GPI expression level positively correlated with the grip strength.
[Conclusion] These results suggested that the exercise- induced GPI expression in skeletal muscle might have a positive effect on skeletal muscle function.

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7Effects of whey protein supplementation prior to, and following, resistance exercise on body composition and training responses: A randomized doubleblind placebo-controlled study

저자 : Yeram Park , Hun-young Park , Jisu Kim , Hyejung Hwang , Yanghoon Jung , Richard Kreider , Kiwon Lim

발행기관 : 한국운동영양학회 간행물 : JENB (Journal of Exercise Nutrition & Biochemistry) 23권 2호 발행 연도 : 2019 페이지 : pp. 34-44 (11 pages)

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[Purpose] The composition of protein supplements, the consumption timing immedi-ately before and after resistance exercise training (RET), and the quantity of protein supplementation may be important factors for the im-provement of muscle mass and function. Although these factors should be considered comprehensively for effective improvement of muscular function in protein supplementation, relatively few studies have focused on this area. Therefore, this study was designed to investigate whether a protein blend supplement before and after resistance exercise for 12 weeks would be effective in increasing muscular function.
[Methods] In total, 18 participants were randomly assigned to a placebo (PLA) or protein blend supplement (PRO) group. All subjects followed the same training routine 3 times per week for 12 weeks, taking placebo or protein supplements immediately before and after each exercise session. The protein supplement consisted of 40 g of blend protein, including hydrolyzed whey protein. The RET consisted of lower body (barbell squat, dead lift, seated leg extension, and lying leg curl) and upper body (bench press, barbell rowing, preacher bench biceps curl, and dumbbell shoulder press) exercises. A repetition was defined as three sets of 10-12 times with 80% of one repetition maximum (1RM).
[Results] Although the PRO group had a lower protein intake in terms of total food intake than the PLA group, the mean changes in muscle circumference, strength, and exercise volume increased, especially at week 12, compared to the PLA group.
[Conclusion] These results suggest that the composition and timing of protein intake are more important than the total amount.

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8Effect of interval exercise versus continuous exercise on excess postexercise oxygen consumption during energy-homogenized exercise on a cycle ergometer

저자 : Won-sang Jung , Hyejung Hwang , Jisu Kim , Hun-young Park , Kiwon Lim

발행기관 : 한국운동영양학회 간행물 : JENB (Journal of Exercise Nutrition & Biochemistry) 23권 2호 발행 연도 : 2019 페이지 : pp. 45-50 (6 pages)

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[Purpose] The purpose of this study was to confirm that the difference in excess post-exercise oxygen consumption (EPOC) during exercise of the spending the same calories between the continuous and interval exercise.
[Methods] Thirty-four healthy college students who did not regularly exercise volunteered to participate in our study. Continuous exercise was performed on an ergometer for 30 min at 60% of maximal oxygen consumption (VO2 max). Interval exercise was performed on a cycle ergometer at 80% VO2 max for 2 min initially, followed by 40% VO2 max for 1 min, and 80% VO2 max for 3 min. This was repeated six times for a total of 26 min.
[Results] The major findings were as follows: (1) energy consumption during exercise was not significantly different between continuous exercise and interval exercise groups; (2) EPOC was higher in interval exercise than in continuous exercise for all dependent variables (i.e., total oxygen consumption, total calories, summation of heart rate); and (3) there were no significant differences in the lipid profile between continuous and interval groups.
[Conclusions] Our study confirmed that after equalizing energy expenditure for continuous and interval exercise on a cycle ergometer in subjects in their twenties, interval exercise results in higher EPOC than continuous exercise. These data suggest that interval exercise may be more effective than continuous exercise in reducing body fat, for a given amount of energy expenditure.

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