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https://www.readbyqxmd.com/read/28723843/no-superior-adaptations-to-carbohydrate-periodization-in-elite-endurance-athletes
#1
Kasper Degn Gejl, Line Thams, Mette Hansen, Torben Rokkedal-Lausch, Peter Plomgaard, Lars Nybo, Filip J Larsen, Daniele A Cardinale, Kurt Jensen, Hans-Christer Holmberg, Kristian Vissing, Niels Ørtenblad
PURPOSE: The present study investigated the effects of periodic CHO restriction on endurance performance and metabolic markers in elite endurance athletes. METHODS: Twenty-six male elite endurance athletes (VO2max: 65.0 ml O2[BULLET OPERATOR]kg[BULLET OPERATOR]min) completed 4 weeks of regular endurance training, while matched and randomized into two groups training with (Low) or without (High) carbohydrate (CHO) manipulation three days a week. The CHO manipulation days consisted of a 1-hr high intensity bike session in the morning, recovery for 7 hrs while consuming isocaloric diets containing either high CHO (414±2...
July 19, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28722361/-food-dependent-exercise-induced-anaphylaxis-a-stepwise-diagnosis
#2
Julien Gaillard, Amélie Borgeat-Kaeser, Guillaume Buss, François Spertini
Food-dependent exercise-induced anaphylaxis (FDEIA) is a potentially severe food allergy. Physical exercise, NSAID, alcohol, infectious diseases and estrogens are recognized cofactors, able to reduce the amount of allergen needed to achieve a threshold for the induction of anaphylaxis. Various kinds of causative food but only a few responsible proteins have been identified. The best known is wheat ω5-gliadine. An oral food challenge remains the gold standard to prove the diagnosis. Its clinical application remains difficult and includes an allergen challenge, a cofactor challenge and a third step which integrates both of them in a single test...
April 5, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28721837/effects-of-progressive-resistance-training-combined-with-a-protein-enriched-lean-red-meat-diet-on-health-related-quality-of-life-in-elderly-women-secondary-analysis-of-a-4-month-cluster-randomised-controlled-trial
#3
Susan J Torres, Sian Robinson, Liliana Orellana, Stella L O'Connell, Carley A Grimes, Niamh L Mundell, David W Dunstan, Caryl A Nowson, Robin M Daly
Resistance training (RT) and increased dietary protein are recommended to attenuate age-related muscle loss in the elderly. This study examined the effect of a lean red meat protein-enriched diet combined with progressive resistance training (RT+Meat) on health-related quality of life (HR-QoL) in elderly women. In this 4-month cluster randomised controlled trial, 100 women aged 60-90 years (mean 73 years) from self-care retirement villages participated in RT twice a week and were allocated either 160 g/d (cooked) lean red meat consumed across 2 meals/d, 6 d/week or ≥1 serving/d (25-30 g) carbohydrates (control group, CRT)...
June 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28721834/the-interaction-between-nutrition-and-exercise-for-promoting-health-and-performance
#4
Oliver C Witard, Derek Ball
The theme of The Nutrition Society Spring Conference 2017 was on the interaction between nutrition and exercise for promoting healthy ageing, maintaining cognitive function and improving the metabolic health of the population. The importance of this theme is highlighted by the public health issues surrounding obesity, diabetes and the age-related loss of skeletal muscle mass (sarcopenia). The opening symposium provided a historical perspective of both invasive and non-invasive methodologies for measuring exercise energetics and energy balance...
July 19, 2017: Proceedings of the Nutrition Society
https://www.readbyqxmd.com/read/28721148/association-of-moderate-aerobic-exercise-and-rho-associated-kinase-2-concentration-in-subjects-with-dyslipidemia
#5
Huadong Bai, Jingchun Sun, Guiying Du, Fengjun Jiao
INTRODUCTION: Dyslipidemia is associated with increased rho-associated kinase 2 (ROCK2) concentration. Whether moderate aerobic exercise could attenuate leukocyte ROCK2 concentration is unknown. MATERIAL AND METHODS: One hundred subjects with dyslipidemia and without statin treatment were enrolled and assigned to exercise and control groups. In the exercise group, at least 30 min of moderate aerobic exercise per day 5 times weekly was recommended. In the control group, participants were recommended to undertake exercise of the same intensity as the exercise group but not mandatorily...
June 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28720712/regulation-of-the-autophagy-system-during-chronic-contractile-activity-induced-muscle-adaptations
#6
Yuho Kim, David A Hood
Skeletal muscle is adaptable to exercise stimuli via the upregulation of mitochondrial biogenesis, and recent studies have suggested that autophagy also plays a role in exercise-induced muscle adaptations. However, it is still obscure how muscle regulates autophagy over the time course of training adaptations. This study examined the expression of autophagic proteins in skeletal muscle of rats exposed to chronic contractile activity (CCA; 6 h/day, 9V, 10 Hz continuous, 0.1 msec pulse duration) for 1, 3, and 7 days (n = 8/group)...
July 2017: Physiological Reports
https://www.readbyqxmd.com/read/28719865/antioxidant-effect-of-exercise-exploring-the-role-of-the-mitochondrial-complex-i-superassembly
#7
J R Huertas, S Al Fazazi, A Hidalgo-Gutierrez, L C López, R A Casuso
Mitochondrial respiratory complexes become assembled into supercomplexes (SC) under physiological conditions. One of the functional roles of these entities is the limitation of reactive oxygen species (ROS) produced by complex I (CI) of the respiratory chain. We sought to determine whether the systemic antioxidant effect of exercise is mediated by the assembly of mitochondrial CIs into SCs in rats. Male Wistar rats were exercise trained or remained sedentary for ten weeks; then, blood samples were collected, and the gastrocnemius muscle was isolated...
July 11, 2017: Redox Biology
https://www.readbyqxmd.com/read/28719765/beetroot-juice-is-more-beneficial-than-sodium-nitrate-for-attenuating-muscle-pain-after-strenuous-eccentric-bias-exercise
#8
Tom Clifford, Glyn Howatson, Daniel J West, Emma J Stevenson
The aim of this study was to compare the effects of beetroot juice (BTJ) and a nitrate only drink (sodium nitrate; SN) on indices of exercise-induced muscle damage (EIMD). Thirty recreationally active males consumed either BTJ (n=10), a nitrate matched SN drink (n=10) or an isocaloric placebo (PLA; n=10) immediately, 24 and 48 h after performing 100 drop jumps. To assess muscle damage, maximal isometric voluntary contractions (MIVC), countermovement jumps (CMJ), pressure-pain threshold (PPT), creatine kinase (CK) and high sensitivity C-reactive protein (hs-CRP) were measured pre, immediately post, 24, 48 and 72 h following the drop jumps...
July 18, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28719669/a-whey-protein-based-multi-ingredient-nutritional-supplement-stimulates-gains-in-lean-body-mass-and-strength-in-healthy-older-men-a-randomized-controlled-trial
#9
Kirsten E Bell, Tim Snijders, Michael Zulyniak, Dinesh Kumbhare, Gianni Parise, Adrian Chabowski, Stuart M Phillips
Protein and other compounds can exert anabolic effects on skeletal muscle, particularly in conjunction with exercise. The objective of this study was to evaluate the efficacy of twice daily consumption of a protein-based, multi-ingredient nutritional supplement to increase strength and lean mass independent of, and in combination with, exercise in healthy older men. Forty-nine healthy older men (age: 73 ± 1 years [mean ± SEM]; BMI: 28.5 ± 1.5 kg/m2) were randomly allocated to 20 weeks of twice daily consumption of either a nutritional supplement (SUPP; n = 25; 30 g whey protein, 2...
2017: PloS One
https://www.readbyqxmd.com/read/28718891/mk-reduces-inhaled-chlorine-triggered-ahr-and-airway-inflammation-in-the-mouse
#10
Yoichiro Hamamoto, Satoshi Ano, Benoit Allard, Michael O'Sullivan, Toby K McGovern, James G Martin
BACKGROUND AND PURPOSE: Cysteinyl leukotrienes (CysLTs) are pro-inflammatory lipid mediators that exacerbate disease state in several asthma phenotypes including asthma induced by allergen, virus and exercise. However, the role of CysLTs in irritant-induced airway disease is not well characterized. The purpose of the current study was to investigate the effect of montelukast (MK), a CysLT1R antagonist, on parameters of irritant-induced asthma (IIA) induced by inhalation of chlorine (Cl2 ) in the mouse...
July 18, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28715885/the-effects-of-exercise-and-cold-exposure-on-mitochondrial-biogenesis-in-skeletal-muscle-and-white-adipose-tissue
#11
Nana Chung, Jonghoon Park, Kiwon Lim
PURPOSE: The purpose of this study was to determine whether exercise or/and cold exposure regulate mitochondria biogenesis-related gene expression in soleus and inguinal adipose tissue of mice. METHODS: Forty ICR 5-week old male mice were divided into four groups: thermoneutrality-untrained (23 ± 1 °C in room temperature, n=10), cold-water immersion (24 ± 1 °C, n=10), exercise in neutral temperature (34 ± 1 °C, n=10), and exercise in cold temperature (24 ± 1 °C, n=10)...
June 30, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28715881/comparison-of-bone-metabolism-based-on-the-different-ages-and-competition-levels-of-junior-and-high-school-female-rhythmic-gymnasts
#12
Taewoong Oh, Tatsuki Naka
PURPOSE: This study was to clarify the effect of age and competition level by measuring bone metabolism markers and bone mineral density measurements of junior high school and high school female rhythmic gymnasts, who restrict their diets to maintain a low body weight, while routinely undertaking long hours of high-intensity exercise, comparing the gymnasts based on their elite/non-elite. METHODS: The study investigated 7 junior high school and 12 high school female rhythmic gymnasts...
June 30, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28715596/influence-of-physical-exercise-on-%C3%AE-amyloid-%C3%AE-synuclein-and-tau-accumulation-an-in-vitro-model-of-oxidative-stress-in-human-red-blood-cells
#13
C Iofrida, S Daniele, D Pietrobono, J Fusi, F Galetta, M L Trincavelli, U Bonuccelli, F Franzoni, C Martini
A common pathological feature of neurodegenerative disorders (NDs), such as Alzheimer's (AD) and Parkinson's (PD) diseases, is the abnormal accumulation and misfolding of specific proteins, primarily α-synuclein (α-syn), β-amyloid1-42 (Aβ) and tau, in brain and in peripheral tissues too. Oxidative stress has been proved to be involved in NDs at various levels and, in particular, in such protein alterations, on the contrary physical activity is emerging as a counteracting factor in NDs. In the present work, the content of Aβ, α-syn and tau in red blood cells (RBCs) derived from ten endurance athletes (ATHL) and ten sedentary volunteers (SED) were compared before and after in vitrooxidative stress treatment...
July 1, 2017: Archives Italiennes de Biologie
https://www.readbyqxmd.com/read/28713463/cardiopulmonary-performance-during-maximal-exercise-in-soccer-players-with-alterations-in-renal-function
#14
Anderson Pontes Morales, Felipe Sampaio-Jorge, Luiz Felipe da Cruz Rangel, Jackson de Souza Menezes, Tiago Costa Leite, Beatriz Gonçalves Ribeiro
The aim of this study was to evaluate the curves of cardiorespiratory variables during cardiopulmonary exercise testing (CPET) in soccer players who had acute alterations in the glomerular filtration rate (GFR) after performing the pre-season training protocol. Sixteen male professional soccer players (25 ± 3 years; 179 ± 2 cm; and 77 ± 6 kg) were evaluated for oxygen uptake (VO2), heart rate (HR) and pulse relative oxygen (relative O2 Pulse) curves with intervals corresponding to 10% of the total duration of CPET...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28713263/the-frequency-dependent-aerobic-exercise-effects-of-hypothalamic-gabaergic-expression-and-cardiovascular-functions-in-aged-rats
#15
Yan Li, Ziqi Zhao, Jiajia Cai, Boya Gu, Yuanyuan Lv, Li Zhao
A decline in cardiovascular modulation is a feature of the normal aging process and associated with cardiovascular diseases (CVDs) such as hypertension and stroke. Exercise training is known to promote cardiovascular adaptation in young animals and positive effects on motor and cognitive capabilities, as well as on brain plasticity for all ages in mice. Here, we examine the question of whether aerobic exercise interventions may impact the GABAergic neurons of the paraventricular nucleus (PVN) in aged rats which have been observed to have a decline in cardiovascular integration function...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28712726/sengers-syndrome-associated-mitochondrial-acylglycerol-kinase-is-a-subunit-of-the-human-tim22-protein-import-complex
#16
Yilin Kang, David A Stroud, Michael J Baker, David P De Souza, Ann E Frazier, Michael Liem, Dedreia Tull, Suresh Mathivanan, Malcolm J McConville, David R Thorburn, Michael T Ryan, Diana Stojanovski
Acylglycerol kinase (AGK) is a mitochondrial lipid kinase that catalyzes the phosphorylation of monoacylglycerol and diacylglycerol to lysophosphatidic acid and phosphatidic acid, respectively. Mutations in AGK cause Sengers syndrome, which is characterized by congenital cataracts, hypertrophic cardiomyopathy, skeletal myopathy, exercise intolerance, and lactic acidosis. Here we identified AGK as a subunit of the mitochondrial TIM22 protein import complex. We show that AGK functions in a kinase-independent manner to maintain the integrity of the TIM22 complex, where it facilitates the import and assembly of mitochondrial carrier proteins...
July 11, 2017: Molecular Cell
https://www.readbyqxmd.com/read/28712264/treadmill-exercise-ameliorates-the-regulation-of-energy-metabolism-in-skeletal-muscle-of-nse-ps2mtransgenic-mice-with-alzheimer-s-disease
#17
Jang-Soo Yook, Joon-Yong Cho
PURPOSE: Alzheimer's disease (AD) is classified as a progressive neurological disorder, which not only causes cognitive impairment but also abnormal weight loss, with a reduction of muscle mass related to the accumulation of amyloid-β (Aβ) in skeletal muscle. Thus, we investigated the effect of treadmill exercise on Aβ deposition, and p-AMPK, p-ACC, BDNF, and GLUT4 protein levels the regulation of muscle energy metabolism using an AD mouse. METHODS: At 13 months of age, NSE/PS2m mice (Tg) and control mice (non-Tg) were assigned to non-exercise control (Con) and exercise groups (Exe)...
March 31, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28712031/human-skeletal-muscle-type-1-fibre-distribution-and-response-of-stress-sensing-proteins-along-the-titin-molecule-after-submaximal-exhaustive-exercise
#18
Satu O A Koskinen, Heikki Kyröläinen, Riina Flink, Harri P Selänne, Sheila S Gagnon, Juha P Ahtiainen, Bradley C Nindl, Maarit Lehti
Early responses of stress-sensing proteins, muscle LIM protein (MLP), ankyrin repeat proteins (Ankrd1/CARP and Ankrd2/Arpp) and muscle-specific RING finger proteins (MuRF1 and MuRF2), along the titin molecule were investigated in the present experiment after submaximal exhaustive exercise. Ten healthy men performed continuous drop jumping unilaterally on a sledge apparatus with a submaximal height until complete exhaustion. Five stress-sensing proteins were analysed by mRNA measurements from biopsies obtained immediately and 3 h after the exercise from exercised vastus lateralis muscle while control biopsies were obtained from non-exercised legs before the exercise...
July 15, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28711659/exercise-initiated-after-the-onset-of-insulin-resistance-improves-trabecular-microarchitecture-and-cortical-bone-biomechanics-of-the-tibia-in-hyperphagic-otsuka-long-evans-tokushima-fatty-rats
#19
Laura C Ortinau, Melissa A Linden, Rebecca K Dirkes, R Scott Rector, Pamela S Hinton
The present study extends our previous findings that exercise, which prevents the onset of insulin resistance and type 2 diabetes (T2D), also prevents the detrimental effects of T2D on whole-bone and tissue-level strength. Our objective was to determine whether exercise improves bone's structural and material properties if insulin resistance is already present in the Otsuka Long-Evans Tokushima Fatty (OLETF) rat. The OLETF rat is hyperphagic due to a loss-of-function mutation in cholecystokinin-1 receptor (CCK-1 receptor), which leads to progressive obesity, insulin resistance and T2D after the majority of skeletal growth is complete...
July 12, 2017: Bone
https://www.readbyqxmd.com/read/28710665/physical-exercise-reduces-pyruvate-carboxylase-pcb-and-contributes-to-hyperglycemia-reduction-in-obese-mice
#20
Vitor Rosetto Muñoz, Rafael Calais Gaspar, Barbara Moreira Crisol, Guilherme Pedron Formigari, Marcella Ramos Sant'Ana, José Diego Botezelli, Rodrigo Stellzer Gaspar, Adelino S R da Silva, Dennys Esper Cintra, Leandro Pereira de Moura, Eduardo Rochete Ropelle, José Rodrigo Pauli
The present study evaluated the effects of exercise training on pyruvate carboxylase protein (PCB) levels in hepatic tissue and glucose homeostasis control in obese mice. Swiss mice were distributed into three groups: control mice (CTL), fed a standard rodent chow; diet-induced obesity (DIO), fed an obesity-inducing diet; and a third group, which also received an obesity-inducing diet, but was subjected to an exercise training protocol (DIO + EXE). Protocol training was carried out for 1 h/d, 5 d/wk, for 8 weeks, performed at an intensity of 60% of exhaustion velocity...
July 14, 2017: Journal of Physiological Sciences: JPS
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