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Journal of Exercise Nutrition & Biochemistry

In-Soo Lim
PURPOSE: This study aimed to analyze the correlation between anxiety, salivary alpha amylase (sAA), and salivary cortisol (sC) changes in athletes showing a high or low level performance in an actual archery competition. METHODS: The participants were female university athletes who participated in the individual 50 m archery competition at the 21st Korean National Archery Team Trials, in July 2018. Based on their game record in the competition, 9 athletes were allocated to the high-performance group (HPG) and another 9 to the low-performance group (LPG)...
December 31, 2018: Journal of Exercise Nutrition & Biochemistry
Inhwan Lee, Jinkyung Cho, Jinkook Park, Hyunsik Kang
PURPOSE: This study examined the association of hand-grip strength (HGS) and non-alcoholic fatty liver disease (NAFLD) index in older adults. METHODS: This was a cross-sectional study involving 538 older adults with mean age of 74.3±6.4 years. Body composition parameters including height, percent body fat, body mass index (BMI), waist circumference (WC), was determined using body composition analyzer. HGS was assessed using a dynamometer, and NAFLD was diagnosed by the simple NAFLD score (SNS), hepatic steatosis index (HSI), NAFLD fibrosis score (NFS), and fibrosis 4 calculator (FIB-4)...
December 31, 2018: Journal of Exercise Nutrition & Biochemistry
Nanako Hayashi, Aya Ishibashi, Kazushige Goto
PURPOSE: We examined the effects of diet before endurance exercise on hepcidin response in young untrained females. METHODS: Ten young untrained females [age: 20.6 ± 0.8 y, height: 157.5 ± 1.0 cm, weight: 54.4 ± 1.5 kg, and maximal oxygen uptake (VO2max): 35.9 ± 1.1 mL/kg/min] were involved in two experimental conditions with a crossover design. The two conditions were separated by approximately 1 month, and each condition was performed during the follicular phase...
December 31, 2018: Journal of Exercise Nutrition & Biochemistry
Yoon-Seok Chun, Se-Kwang Ku, Jong-Kyu Kim, Sok Park, In-Ho Cho, Nam-Ju Lee
PURPOSE: This study aimed to study the protective effects and mechanism of Blue Honeysuckle (BH) extracts (Berries of Lonicera caerulea L.) on non-alcoholic fatty liver disease (NAFLD) and obesity risk factors in a high fat-diet (HFD) model. METHODS: Animals adapted to HFD were selected after 1 week of adaption period and divided into 6 groups (8 mice in each group; 40 HFD-fed mice and 8 normal fat pellet diet (NFD)-fed mice). After the end of 12 weeks of continuous oral administrations of 3 different dosages of BH extract, 400, 200 and 100 mg/kg, or metformin 250 mg/kg, dissolved in a volume of 10 mL/kg distilled water, the hepatoprotective, hypolipidemic, hypoglycemic, nephroprotective, and anti-obesity effects were analyzed...
December 31, 2018: Journal of Exercise Nutrition & Biochemistry
Hun-Young Park, Won-Sang Jung, Jisu Kim, Hyejung Hwang, Kiwon Lim
PURPOSE: Hemodynamic function is a parameter indicating oxygen delivery and utilization capacity and is an important determinant of exercise performance. The present study aimed to determine whether intermittent hypoxic training (IHT) ameliorates hemodynamic function and exercise performance in competitive swimmers. METHODS: Twenty competitive swimmers (10 men, 10 women) volunteered to participate in the study. Participants were divided into the normoxic training (NT) group and the hypoxic training (HT) group and were subjected to training in a simulated altitude of 3000 m...
December 31, 2018: Journal of Exercise Nutrition & Biochemistry
Mesfin Yimam, Shawn M Talbott, Julie A Talbott, Lidia Brownell, Qi Jia
PURPOSE: Sudden and exhaustive exercise causes muscle damage accompanied by oxidative stress and inflammation, leading to muscle fatigue and soreness. AmLexin contains a standardized blend of extracts from the heartwood of Acacia catechu and the root bark of Morus alba, and is known to possess antioxidant and anti-inflammatory properties. The aim of this study was to investigate the effects of this proprietary blend supplementation on muscular pain and redox balance in healthy runners, in comparison to a placebo...
December 31, 2018: Journal of Exercise Nutrition & Biochemistry
Majid S Koozehchian, Amin Daneshfar, Ebrahim Fallah, Hamid Agha-Alinejad, Mohammad Samadi, Mojtaba Kaviani, Maryam Kaveh B, Y Peter Jung, Mozhgan Hassanzadeh Sablouei, Najmeh Moradi, Conrad P Earnest, T Jeff Chandler, Richard B Kreider
PURPOSE: Studies of L-carnitine in healthy athletic populations have yielded equivocal results. Further scientific-based knowledge is needed to clarify the ability of L-carnitine to improve exercise capacity and expedite the recovery process by reducing oxidative stress. This study aimed to examine the 9-week effects of L-carnitine supplementation on exercise performance, anaerobic capacity, and exercise-induced oxidative stress markers in resistance-trained males. METHODS: In a double-blind, randomized, and placebo-controlled treatment, 23 men (age, 25±2y; weight, 81...
December 31, 2018: Journal of Exercise Nutrition & Biochemistry
Hyo-Youl Moon
PURPOSE: Despite numerous studies, the mechanisms underlying the effects of exercise on brain function are not yet fully understood. Adult hippocampal neurogenesis is one of the most well-known effects of exercise on the brain, but its physiological roles during exercise are still ambiguous, mostly due to the difference in the structure and composition of each part of the hippocampus. METHODS: In this study, we analyzed exercise-induced changes in gene expression in the subgranular zone (SGZ) and granular cell layer (GCL) of the hippocampus...
December 31, 2018: Journal of Exercise Nutrition & Biochemistry
Hyun Namgoong, Chaeeun Cho, Sewon Lee
PURPOSE: Previous studies have indicated that Kv7 channels have an important role in the regulation of blood vessel reactivity, including in the coronary, renal, and cerebral arteries. The present studies examined whether Kv7 channels regulated vascular reactivity in the mouse aorta and investigated the mechanisms involved in the reactivity. METHODS: Wild-type (WT) male C57BL/6 mice, between 10 and 15 weeks old, were used in this study. The vascular function of the aorta in WT male mice was assessed by using a pin myography system (Model 620; DMT, Denmark)...
September 30, 2018: Journal of Exercise Nutrition & Biochemistry
Jinkyung Cho, Donghyun Kim, Jungmoon Jang, Jeonghyeon Kim, Hyunsik Kang
PURPOSE: To investigate the effect of treadmill running on D2R deficiency related susceptibility to high fat diet (HFD )-induced obesity and its metabolic complications. METHODS: D2R-/- and +/- mice were obtained by backcrossing D2R+/- heterozygotes on wild type (WT) littermates (C57BL/6J background) for >10 generations. Mice were randomly assigned to 1) WT mice with standard chow (SC) (WT+SC); 2) WT mice with high-fat diet (WT+HFD); 3) WT mice with high-fat diet plus exercise (WT+HFD+EX), 4) heterozygous (HET) D2R mice with SC (HET+SC); 5) heterozygous D2R mice with HFD (HET+HFD); and 6) heterozygous D2R mice with HFD plus exercise (HET+HFD+EX)...
September 30, 2018: Journal of Exercise Nutrition & Biochemistry
Yea-Hyun Leem, Hyukki Chang
PURPOSE: Chronic stress affects the neuronal architecture of hippocampal subfields including the Cornu Ammonis 1 (CA1) region, which governs long-term memory. Exercise exerts a beneficial effect on memory improvement via hippocampal AMP-activated protein kinase (AMPK) activation. However, the relationship between the two phenomena is poorly understood. This study used animal and cell culture experimental systems to investigate whether chronic stress-induced impairment of memory consolidation and maladaptation of the neuronal architecture in the hippocampal CA1 area is prevented by regular exercise through AMPK activation...
September 30, 2018: Journal of Exercise Nutrition & Biochemistry
Soeun Jeon, Kyungho Cho, Gina Ok, Sukho Lee, Hyon Park
PURPOSE: The purpose of this study was to investigate the impact of weight loss practices on nutritional status, bone health, and injury history among Korean professional jockeys. METHODS: Forty-three male jockeys completed a questionnaire to assess their weight loss practices. Of these, 10 jockeys were selected for in-depth assessment of their nutritional status, bone health, and injury history. RESULTS: The questionnaires revealed that 81...
September 30, 2018: Journal of Exercise Nutrition & Biochemistry
Seong-Eun Kwak, Ji-Hyun Lee, Didi Zhang, Wook Song
PURPOSE: Although it is known that exercise induces angiogenesis, a clear mechanism has remained elusive due to various experimental limitations. This review presents the current status of angiogenesis-related experiments and future directions of experimentation in relation to exercise, aging, and cancer. METHODS: We conducted a PubMed search of the available literature to identify reported exercise related changes of angiogenic factors obtained in vitro using C2C12 cells and endothelial cells, and in vivo using animal experiments and in clinical studies...
September 30, 2018: Journal of Exercise Nutrition & Biochemistry
Ragip Pala, Fahrettin Beyaz, Mehmet Tuzcu, Besir Er, Nurhan Sahin, Vedat Cinar, Kazim Sahin
PURPOSE: The aim of the study was to determine the effects of dietary CoQ10 on serum biochemical parameters, lipid peroxidation, and HSP expression in the liver and slow-twitch muscles (soleus and gastronemius deep portion) of exercise-trained rats. METHODS: A total of 42 Wistar albino rats were divided into six groups: 1) Control, 2) Coenzyme Q10 (CoQ10), 3) Chronic Exercise (CE), 4) CE + CoQ10, 5) Acute Exercise (AE), and 6) AE + CoQ10. The rats were subjected to the running test 5 days a week for 6 weeks after which CoQ10 was administered via the diet...
September 30, 2018: Journal of Exercise Nutrition & Biochemistry
Cho In-Ho, Kang Byung-Woo, Park Yun-Jae, Lee Han-Joo, Park Sok, Lee Namju
PURPOSE: The purpose of this study was to determine whether ginseng berry extract improves blood circulation by regulating vasodilator expression in exposed to tumor necrosis factor alpha (TNF-α)-exposed endothelial cells and muscle cells. METHODS: Nitric oxide (NO) and cGMP levels in human umbilical vein endothelial cells (HUVECs) and A7r5 cells exposed to ginseng berry extract were investigated. Based on the in vitro results, healthy participants were treated with ginseng berry extract for 4 weeks and then a non-invasive vascular screening device was used to confirm the improvement of blood circulation...
September 30, 2018: Journal of Exercise Nutrition & Biochemistry
Lee Min Chul, Lee Sung Ki, Jung Suk Yool, Moon Hyung Hoon
PURPOSE: Exercise effectively enhances physiological adaptation, performance, and health-related markers in healthy individuals and diseased populations. However, the type and amount of optimal exercise remain controversial. High-intensity interval training (HIIT) took the top spot in the American College of Sports Medicine worldwide survey on fitness trends in 2018. METHODS: We review information on the effect of HIIT on physiological adaptation and the novel role on brain functions...
September 30, 2018: Journal of Exercise Nutrition & Biochemistry
Seung-Lyul Oh, Sang Hoon Yoon, Jae-Young Lim
PURPOSE: Declining muscle strength and function are hallmarks of the aging process. This study aimed to determine sex-related differences in myosin heavy chain (MHC) isoforms and muscle mass, strength, and quality with aging. METHODS: This cross-sectional study recruited 53 healthy participants (32 men, 21 women) aged 20-85 years who were divided into four groups: young men (n=17, YM, 29.23±4.51), older men (n=15, OM, 71.87±3.42), young women (n=11, YW, 29.64±4...
June 30, 2018: Journal of Exercise Nutrition & Biochemistry
Hojun Lee, Jae-Young Lim, Seung-Jun Choi
PURPOSE: Myogenic progenitors play a critical role in injury-induced myofiber regeneration. The purpose of this study was to characterize the effects of oleate and L-carnitine on the overall behavior of proliferating myogenic progenitors (myoblasts) and its link to the mitochondrial biogenic process. METHODS: C2C12 myoblasts were cultured either with no treatment, oleate, L-carnitine, or their mixture. Proliferating myoblasts were investigated under a phase-contrast microscope...
June 30, 2018: Journal of Exercise Nutrition & Biochemistry
Suji Baek, Nan Hee Choi, Kang-Pa Lee, Hyunjhung Jhun, Jisu Kim
PURPOSE: Yacon, Smallanthus sonchifolius, has anti-hypertensive, anti-inflammatory, and anti-cancer potential. However, its neuroprotective and anti-neuroinflammatory effects are unknown. Moreover, activation of microglia has been considered a mechanism in the development of Alzheimer's disease. Therefore, the aim of this study was to determine the neuroprotective effects of an ethanolic yacon leaf extract (YLE) on lipopolysaccharide (LPS)-induced neuroinflammation in vitro and in vivo...
June 30, 2018: Journal of Exercise Nutrition & Biochemistry
Nana Chung, Mi-Young Park, Jisu Kim, Hun-Young Park, Hyejung Hwang, Chi-Ho Lee, Jin-Soo Han, Jaemoo So, Jonghoon Park, Kiwon Lim
PURPOSE: The purpose of this review is to promote awareness of non-exercise activity thermogenesis (NEAT) as a new strategy to increase energy expenditure, and to manage obesity. METHODS: The content of this review is based on a literature search of PubMed and the Google Scholar search engine, using the search terms obesity, energy expenditure, non-exercise activity thermogenesis (NEAT), and sitting disease. RESULTS: Daily energy expenditure is of great interest because most obese individuals have no exercise activity-related thermogenesis (EAT); thus their physical activity-related energy expenditure (PEE) is comprised almost entirely of NEAT...
June 30, 2018: Journal of Exercise Nutrition & Biochemistry
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