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Glycogen and fatigue

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https://www.readbyqxmd.com/read/28432118/molecular-basis-for-exercise-induced-fatigue-the-importance-of-strictly-controlled-cellular-ca-2-handling
#1
Arthur J Cheng, Nicolas Place, Håkan Westerblad
The contractile function of skeletal muscle declines during intense or prolonged physical exercise, that is, fatigue develops. Skeletal muscle fibers fatigue acutely during highly intense exercise when they have to rely on anaerobic metabolism. Early stages of fatigue involve impaired myofibrillar function, whereas decreased Ca(2+) release from the sarcoplasmic reticulum (SR) becomes more important in later stages. SR Ca(2+) release can also become reduced with more prolonged, lower intensity exercise, and it is then related to glycogen depletion...
April 21, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28413958/anti-fatigue-effects-of-active-ingredients-from-traditional-chinese-medicine-a-review
#2
Si-Si Zhou, Jian-Guo Jiang
Fatigue, a phenomenon which is believed to be caused by body exercise, can lead to the failure of predetermined exercise intensity maintenance and sport ability declination. The usage of traditional Chinese medicine (TCM) in the treatment of fatigue has long been practiced in clinical and showed significant effects. This article covers related literatures in recent years and sorts the effective ingredients from TCM for treating fatigue into a few categories including alkaloids, saponins, polysaccharides, polyphenols, polypeptide, terpene, proteins and other active ingredients...
April 14, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28413647/nigella-sativa-seed-extract-attenuates-the-fatigue-induced-by-exhaustive-swimming-in-rats
#3
Mahbubur Rahman, Dong Kwon Yang, Gi-Beum Kim, Sei-Jin Lee, Shang-Jin Kim
In previous studies, Nigella sativa (NS) has been studied due to its various physiological and pharmacological activities. However, evidence on the effects of NS on physical fatigue following exhaustive swimming remains limited. In the present study, the authors evaluated the potential beneficial effects of NS against the fatigue activity following exhaustive swimming. Rats were orally administered with NS extract (2 g/kg/day) for 21 days, and the anti-fatigue effect was assessed by exhaustive swimming exercise...
April 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28394459/ergogenic-properties-of-metformin-in-simulated-high-altitude
#4
Rebecca L Scalzo, Hunter L Paris, Scott E Binns, Janelle L Davis, Joseph W Beals, Christopher L Melby, Gary J Luckasen, Matthew S Hickey, Benjamin F Miller, Karyn L Hamilton, Christopher Bell
Metformin augments glucose/glycogen regulation and may acutely promote fatigue resistance during high-intensity exercise. In hypobaric environments, such as high altitude, the important contribution of carbohydrates to physiological function is accentuated as glucose/glycogen dependence is increased. Because hypoxia/hypobaria decreases insulin sensitivity, replenishing skeletal muscle glycogen in high altitude becomes challenging and subsequent physical performance may be compromised. We hypothesized that in conditions where glycogen repletion was critical to physical outcomes, metformin would attenuate hypoxia-mediated decrements in exercise performance...
April 10, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28335458/in-vitro-antioxidant-activity-and-in-vivo-anti-fatigue-effect-of-sea-horse-hippocampus-peptides
#5
Zebin Guo, Duanquan Lin, Juanjuan Guo, Yi Zhang, Baodong Zheng
This study investigated changes the in vitro antioxidant activity of Hippocampus polypeptides during enzymatic hydrolysis, including the effects of enzyme species, enzyme concentration, material-liquid ratio, hydrolysis time, pH, and temperature of the reaction system. Its in vivo anti-fatigue activity was also studied. Hippocampus peptide prepared by papain digestion exhibited the highest 1,1-diphenyl-2-picryl-hydrazyl free radical scavenging rate (71.89% ± 1.50%) and strong hydroxyl radical scavenging rate (75...
March 18, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28165424/changbai-mountain-ginseng-panax-ginseng-c-a-mey-extract-supplementation-improves-exercise-performance-and-energy-utilization-and-decreases-fatigue-associated-parameters-in-mice
#6
Guo-Dong Ma, Chun-Hui Chiu, Yi-Ju Hsu, Chien-Wen Hou, Yi-Ming Chen, Chi-Chang Huang
Changbai Mountain Ginseng (CMG, Panax ginseng C.A. Mey) is a traditional medicine commonly found in Northeast China and grows at elevations of 2000 m or higher in the Changbai Mountain Range. CMG, considered to be a "buried treasure medicine", is priced higher than other types of ginseng. However, few studies have demonstrated the effects of CMG supplementation on exercise performance, physical fatigue, and the biochemical profile. The major compound of CMG extract was characterized by electrospray ionization tandem mass spectrometry (HPLC-ESI-MS/MS)...
February 5, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28106808/anti-fatigue-effects-of-the-unique-polysaccharide-marker-of-dendrobium-officinale-on-balb-c-mice
#7
Wei Wei, Zhi-Peng Li, Tong Zhu, Hau-Yee Fung, Tin-Long Wong, Xin Wen, Dik-Lung Ma, Chung-Hang Leung, Quan-Bin Han
Dendrobium officinale extract shows potent anti-fatigue effects; however, the active substance responsible for these effects remains undetermined. A glucomannan with a huge molecular size of 730 kDa, called DOP, was identified as the unique authentication marker of this expensive herb. DOP exhibited immunomodulating effects on macrophages and lymphocytes in our previous study. Clinical reports also showed that people with fatigue syndrome have a disturbed immune system. Because DOP is the unique and dominant component of D...
January 18, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27983751/muscle-glycogen-where-did-you-come-from-where-did-you-go
#8
George G Schweitzer, Monica L Kearney, Bettina Mittendorfer
No abstract text is available yet for this article.
December 16, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27983571/anti-fatigue-effects-of-small-molecule-oligopeptides-isolated-from-panax-ginseng-c-a-meyer-in-mice
#9
Lei Bao, Xiaxia Cai, Junbo Wang, Yuan Zhang, Bin Sun, Yong Li
Panax ginseng C. A. Meyer (ginseng) is an edible and medicinal Chinese herb, which is often used in Asian countries for physical fitness. Ginseng is reported to have a wide range of biological activity and pharmaceutical properties. There were more studies on ginsenosides and polysaccharides, but fewer studies on ginseng oligopeptides (GOP), which are small molecule oligopeptides isolated from ginseng. The present study was designed to evaluate the anti-fatigue effects of GOP in mice and explore the possible underlying mechanism...
December 13, 2016: Nutrients
https://www.readbyqxmd.com/read/27983570/anti-fatigue-effect-by-peptide-fraction-from-protein-hydrolysate-of-croceine-croaker-pseudosciaena-crocea-swim-bladder-through-inhibiting-the-oxidative-reactions-including-dna-damage
#10
Yu-Qin Zhao, Li Zeng, Zui-Su Yang, Fang-Fang Huang, Guo-Fang Ding, Bin Wang
The swim bladder of the croceine croaker (Pseudosciaena crocea) was believed to have good curative effects in various diseases, including amnesia, insomnia, dizziness, anepithymia, and weakness after giving birth, in traditional Chinese medicine. However, there is no research focusing on the antioxidant and anti-fatigue peptides from croceine croaker swim bladders at present. Therefore, the purpose of this study was to investigate the bioactivities of peptide fractions from the protein hydrolysate of croceine croaker related to antioxidant and anti-fatigue effects...
December 13, 2016: Marine Drugs
https://www.readbyqxmd.com/read/27882212/resveratrol-and-exercise
#11
Saltuk Bugra Baltaci, Rasim Mogulkoc, Abdulkerim Kasim Baltaci
Although it is recommended for a healthy lifestyle, moderate exercise is known to lead to oxidative stress, inflammation and muscle injury. Hence there are efforts to develop dietary strategies to counter the oxidative stress caused by physical activity. Recently, there has been an interest in the capability of resveratrol (RES) to modulate physical performance and prevent oxidative stress. Despite the inconsistency among reports regarding the topic, it has been suggested that RES delays fatigue by hindering lipid peroxidation...
November 2016: Biomedical Reports
https://www.readbyqxmd.com/read/27834150/intranasal-delivery-of-microspheres-loaded-with-20-r-ginsenoside-rg3-enhances-anti-fatigue-effect-in-mice
#12
Wei Zhang, Xiaoyu Wang, Min Zhang, Min Xu, Wenyan Tang, Yi Zhang, Lei Lu, Jing Gao, Shen Gao
Nasal delivery of 20 (R) -ginsenoside Rg3 (Rg3) has a short-lived anti-fatigue effect owing to rapid clearance by nasal cilia. Thus, in order to extend the residence time of Rg3 in the nasal cavity, a new drug delivery system is needed. Chitosan microspheres loaded with Rg3 were prepared using a multi-step emulsification method. They had a spherical shape with a mean diameter of 44.9±12.6 µm. The drug-loading ratio was 10.25±0.08%, and the encapsulation ratio was 30.61±1.46%. Our in vitro mucoadhesion experiment demonstrated that 70...
November 9, 2016: Current Drug Delivery
https://www.readbyqxmd.com/read/27806677/power-duration-relationship-physiology-fatigue-and-the-limits-of-human-performance
#13
Mark Burnley, Andrew M Jones
The duration that exercise can be maintained decreases as the power requirements increase. In this review, we describe the power-duration (PD) relationship across the full range of attainable power outputs in humans. We show that a remarkably small range of power outputs is sustainable (power outputs below the critical power, CP). We also show that the origin of neuromuscular fatigue differs considerably depending on the exercise intensity domain in which exercise is performed. In the moderate domain (below the lactate threshold, LT), fatigue develops slowly and is predominantly of central origin (residing in the central nervous system)...
November 3, 2016: European Journal of Sport Science
https://www.readbyqxmd.com/read/27783320/lignans-rich-extract-from-herpetospermum-caudigerum-alleviate-physical-fatigue-in-mice
#14
Shi-Ying Jin, Rui-Sheng Li, Bao-de Shen, Jin-Xia Bai, Ping-Hua Xu, Ling Dai, He Xu, Shi-Xiao Jin, Jin Han, Hai-Long Yuan
OBJECTIVE: To ascertain anti-fatigue constituents and mechanisms of Herpetospermum caudigerum. METHODS: The 80% ethanol extracts of Herpetospermum caudigerum were partitioned with chloroform, ethyl acetate and n-butanol, respectively. Male Kunming mice were divided into 13 groups with 16 mice in each group: a control group fed with water, 9 groups treated with 3 fractions of Herpetospermum caudigerum (chloroform fraction, ethyl acetate fraction and n-butanol fraction) at dose of 80, 160 and 320 mg/kg for the low-dose group, medium-dose group and high-dose group, 3 herpetrione (HPE) treated groups fed with HPE at dose of 15, 30, and 60 mg/kg for the low-dose group, medium-dose group and high-dose group...
November 2016: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/27775591/capsaicin-supplementation-reduces-physical-fatigue-and-improves-exercise-performance-in-mice
#15
Yi-Ju Hsu, Wen-Ching Huang, Chien-Chao Chiu, Yan-Lin Liu, Wan-Chun Chiu, Chun-Hui Chiu, Yen-Shuo Chiu, Chi-Chang Huang
Chili pepper is used as a food, seasoning and has been revered for its medicinal and health claims. It is very popular and is the most common spice worldwide. Capsaicin (CAP) is a major pungent and bioactive phytochemical in chili peppers. CAP has been shown to improve mitochondrial biogenesis and adenosine triphosphate (ATP) production. However, there is limited evidence around the effects of CAP on physical fatigue and exercise performance. The purpose of this study was to evaluate the potential beneficial effects of CAP on anti-fatigue and ergogenic functions following physiological challenge...
October 20, 2016: Nutrients
https://www.readbyqxmd.com/read/27766021/dehydroepiandrosterone-supplementation-combined-with-whole-body-vibration-training-affects-testosterone-level-and-body-composition-in-mice
#16
Wen-Chyuan Chen, Yi-Ming Chen, Chi-Chang Huang, Yen-Dun Tzeng
Dehydroepiandrosterone (DHEA), the most abundant sex steroid, is primarily secreted by the adrenal gland and a precursor hormone used by athletes for performance enhancement. Whole-body vibration (WBV) is a well-known light-resistance exercise by automatic adaptations to rapid and repeated oscillations from a vibrating platform, which is also a simple and convenient exercise for older adults. However, the potential effects of DHEA supplementation combined with WBV training on to body composition, exercise performance, and hormone regulation are currently unclear...
2016: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/27713820/fibromyalgia-syndrome-metabolic-and-autophagic-processes-in-intermittent-cold-stress-mice
#17
Lisa Oezel, Hanna Then, Anna L Jung, Samir Jabari, Gabriel A Bonaterra, Thaddeus T Wissniowski, Susanne F Önel, Matthias Ocker, Kati Thieme, Ralf Kinscherf, Pietro Di Fazio
Fibromyalgia is characterized by widespread musculoskeletal pain, fatigue, and depression. The aim was to analyze potential mitochondrial dysfunction or autophagy in mice after exposure to intermittent cold stress (ICS). Muscle and liver specimens were obtained from 36 mice. Lactate dehydrogenase (LDH) activity was measured. Microtubule-associated protein light chain 3 (MAP1LC3B) and glycogen content were determined histologically; muscle ultrastructure by electron microscopy. Mitochondrial- and autophagy-related markers were analyzed by RT-qPCR and Western blotting...
October 2016: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/27679573/orm-promotes-skeletal-muscle-glycogen-accumulation-via-ccr5-activated-ampk-pathway-in-mice
#18
Zhen Qin, Jing-Jing Wan, Yang Sun, Peng-Yuan Wang, Ding-Feng Su, Hong Lei, Xia Liu
We found previously that acute phase protein orosomucoid reacts to fatigue and activates C-C chemokine receptor type 5 to increase muscle glycogen storage and enhance muscle endurance (Lei et al., 2016). To explore the underlying molecular mechanisms, we investigated the role of AMP-activated protein kinase, a critical fuel sensor in skeletal muscle, in C-C chemokine receptor type 5-mediated orosomucoid action. It was found orosomucoid increased skeletal muscle AMP-activated protein kinase activation in a time- and dose- dependent manner, which was largely prevented by pharmacological blocking or knockout of C-C chemokine receptor type 5...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27636512/anti-fatigue-effect-by-active-dipeptides-of-fermented-porcine-placenta-through-inhibiting-the-inflammatory-and-oxidative-reactions
#19
Sun-Young Nam, Hyung-Min Kim, Hyun-Ja Jeong
BACKGROUND: Recently, we reported an anti-fatigue effect of fermented porcine placenta (FPP). Glycine-leucine (GL) and leucine-glycine (LG) dipeptides are main peptides of FPP. However, the therapeutic effects and underlying mechanisms of GL and LG dipeptides on fatigue are still unclear. METHODS: Herein, we examined the anti-fatigue properties of GL and LG dipeptides using RAW264.7 macrophages and forced swimming test (FST) animal model. RESULTS: Our data revealed that lipopolysaccharide (LPS)-induced interleukin (IL)-1β, tumor necrosis factor-α, and IL-6 productions were markedly inhibited by GL or LG in RAW264...
December 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27601853/antifatigue-effects-of-ethanol-extracts-and-polysaccharides-isolated-from-abelmoschus-esculentus
#20
Yu-Xian Li, Zhong-Han Yang, Yin Lin, Wei Han, Shan-Shan Jia, Ke Yuan
BACKGROUND: The aim of this study is to determine the antifatigue active fraction from Abelmoschus esculentus. The in vivo antifatigue effects of ethanol extracts and polysaccharides from A. esculentus fruit have been determined. The polysaccharides of A. esculentus were determined as the best effective fractions of antifatigue effects. MATERIALS AND METHODS: About 360 Kunming male mice were randomly divided into nine subgroups: normal control subgroup, model subgroup, positive subgroup and the ethanol extracts of A...
July 2016: Pharmacognosy Magazine
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