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https://www.readbyqxmd.com/read/28505224/muscle-bioenergetic-considerations-for-intrinsic-laryngeal-skeletal-muscle-physiology
#1
Mary J Sandage, Audrey G Smith
Purpose: Intrinsic laryngeal skeletal muscle bioenergetics, the means by which muscles produce fuel for muscle metabolism, is an understudied aspect of laryngeal physiology with direct implications for voice habilitation and rehabilitation. The purpose of this review is to describe bioenergetic pathways identified in limb skeletal muscle and introduce bioenergetic physiology as a necessary parameter for theoretical models of laryngeal skeletal muscle function. Method: A comprehensive review of the human intrinsic laryngeal skeletal muscle physiology literature was conducted...
May 15, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28448687/postexercise-blood-flow-restriction-does-not-enhance-muscle-hypertrophy-induced-by-multiple-set-high-load-resistance-exercise
#2
Haruhiko Madarame, Satoshi Nakada, Takahisa Ohta, Naokata Ishii
To test the applicability of postexercise blood flow restriction (PEBFR) in practical training programmes, we investigated whether PEBFR enhances muscle hypertrophy induced by multiple-set high-load resistance exercise (RE). Seven men completed an eight-week RE programme for knee extensor muscles. Employing a within-subject design, one leg was subjected to RE + PEBFR, whereas contralateral leg to RE only. On each exercise session, participants performed three sets of unilateral knee extension exercise at approximately 70% of their one-repetition maximum for RE leg first, and then performed three sets for RE + PEBFR leg...
April 27, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28377392/effects-of-testosterone-and-evoked-resistance-exercise-after-spinal-cord-injury-terex-sci-study-protocol-for-a-randomised-controlled-trial
#3
Ashraf S Gorgey, Refka E Khalil, Ranjodh Gill, Laura C O'Brien, Timothy Lavis, Teodoro Castillo, David X Cifu, Jeannie Savas, Rehan Khan, Christopher Cardozo, Edward J Lesnefsky, David R Gater, Robert A Adler
INTRODUCTION: Individuals with spinal cord injury (SCI) are at a lifelong risk of obesity and chronic metabolic disorders including insulin resistance and dyslipidemia. Within a few weeks of injury, there is a significant decline in whole body fat-free mass, particularly lower extremity skeletal muscle mass, and subsequent increase in fat mass (FM). This is accompanied by a decrease in anabolic hormones including testosterone. Testosterone replacement therapy (TRT) has been shown to increase skeletal muscle mass and improve metabolic profile...
April 4, 2017: BMJ Open
https://www.readbyqxmd.com/read/28328712/resistance-training-induced-elevations-in-muscular-strength-in-trained-men-are-maintained-after-2-weeks-of-detraining-and-not-differentially-affected-by-whey-protein-supplementation
#4
Paul S Hwang, Thomas L Andre, Sarah K McKinley-Barnard, Flor E Morales Marroquín, Joshua J Gann, Joon J Song, Darryn S Willoughby
Hwang, PS, Andre, TL, McKinley-Barnard, SK, Morales Marroquín, FE, Gann, JJ, Song, JJ, and Willoughby, DS. Resistance training-induced elevations in muscular strength in trained men are maintained after 2 weeks of detraining and not differentially affected by whey protein supplementation. J Strength Cond Res 31(4): 869-881, 2017-Resistance training (RT) with nutritional strategies incorporating whey protein intake postexercise can stimulate muscle protein synthesis and elicit hypertrophy. The early phases of training-induced anabolic responses can be attenuated with longer-term training...
April 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28314091/changes-in-muscle-architecture-of-biceps-femoris-induced-by-eccentric-strength-training-with-nordic-hamstring-exercise
#5
D Alonso-Fernandez, P Docampo-Blanco, J Martinez-Fernandez
Eccentric strength training alters muscle architecture, but it is also an important factor for the prevention of hamstring injuries. The purpose was to determine the architectural adaptations of the biceps femoris long head (BFlh) after eccentric strength training with nordic hamstring exercise (NHE), followed by a subsequent detraining period. The participants in this intervention (n=23) completed a period of 13 weeks consisting of a first week of control and prior training, followed by 8 weeks of eccentric strength training with NHE, and concluding with a 4-week period of detraining...
March 17, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28287021/evaluation-of-a-static-stretching-intervention-on-vascular-endothelial-function-and-arterial-stiffness
#6
Hiromi Shinno, Satoshi Kurose, Yutaka Yamanaka, Kyoko Higurashi, Yaeko Fukushima, Hiromi Tsutsumi, Yutaka Kimura
PURPOSE: Maintenance and enhancement of vascular endothelial function contribute to the prevention of cardiovascular disease and prolong a healthy life expectancy. Given the reversible nature of vascular endothelial function, interventions to improve this function might prevent arteriosclerosis. Accordingly, we studied the effects of a 6-month static stretching intervention on vascular endothelial function (reactive hyperaemia peripheral arterial tonometry index: RH-PAT index) and arterial stiffness (brachial-ankle pulse wave velocity: baPWV) and investigated the reversibility of these effects after a 6-month detraining period following intervention completion...
March 13, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28275174/physiological-and-clinical-relevance-of-exercise-ventilatory-efficiency-in-copd
#7
REVIEW
J Alberto Neder, Danilo C Berton, Flavio F Arbex, Maria Clara Alencar, Alcides Rocha, Priscila A Sperandio, Paolo Palange, Denis E O'Donnell
Exercise ventilation (V'E) relative to carbon dioxide output (V'CO2 ) is particularly relevant to patients limited by the respiratory system, e.g. those with chronic obstructive pulmonary disease (COPD). High V'E-V'CO2 (poor ventilatory efficiency) has been found to be a key physiological abnormality in symptomatic patients with largely preserved forced expiratory volume in 1 s (FEV1). Establishing an association between high V'E-V'CO2 and exertional dyspnoea in mild COPD provides evidence that exercise intolerance is not a mere consequence of detraining...
March 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28270443/skeletal-muscle-pgc-1%C3%AE-signaling-is-sufficient-to-drive-an-endurance-exercise-phenotype-and-to-counteract-components-of-detraining-in-mice
#8
Samuel Lee, Teresa C Leone, Lisa Rogosa, John Rumsey, Julio Ayala, Paul M Coen, Robert H Fitts, Rick B Vega, Daniel P Kelly
Peroxisome proliferator-activated receptor-γ coactivator (PGC)-1α and -1β serve as master transcriptional regulators of muscle mitochondrial functional capacity and are capable of enhancing muscle endurance when overexpressed in mice. We sought to determine whether muscle-specific transgenic overexpression of PGC-1β affects the detraining response following endurance training. First, we established and validated a mouse exercise-training-detraining protocol. Second, using multiple physiological and gene expression end points, we found that PGC-1β overexpression in skeletal muscle of sedentary mice fully recapitulated the training response...
May 1, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28269975/effects-of-detraining-on-neuromuscular-performance-in-a-selected-group-of-elite-women-pole-vaulters-a-case-study
#9
Irineu Loturco, Lucas A Pereira, Ronaldo Kobal, Henrique C Martins, Katia Kitamura, Cesar C Abad, Fabio Y Nakamura
The aim of this paper was to determine the effects of 28 days of inactivity on neuromuscular performance of elite women pole-vaulters. Four athletes undertook measurements of rate of force development (RFD), unloaded and loaded vertical jump tests, drop jumps and a 45 m sprint test before and after a transition period of planned inactivity. The RFD, the ability to accelerate over very short distances (5 m) and sprinting capacity improved after training cessation. Acceleration over longer distances (5-45 m) was impaired, while unloaded and loaded vertical jump tests suffered trivial to small changes...
April 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28244559/high-versus-low-load-resistance-training-the-effect-of-24-weeks-detraining-on-serum-brain-derived-neurotrophic-factor-bdnf-in-older-adults
#10
L Nuvagah Forti, E Van Roie, R Njemini, W Coudyzer, I Beyer, C Delecluse, I Bautmans
BACKGROUND: Previously we showed that 12 weeks of mixed-low resistance training (LOW+) significantly increased circulating BDNF in older male individuals. OBJECTIVES: To examine the impact of 24 weeks detraining on circulating BDNF. DESIGN: Randomized intervention study. SETTING: Community-dwelling older adults. PARTICIPANTS AND METHODS: Forty-seven out of 56 participants stopped training (detraining) after 12 weeks of resistance exercise (3x/week) at either HIGH-resistance (5 Males, 5 Females, 2x10-15 repetitions at 80%1RM), LOW-resistance (6 Males, 7 Females, 1x80-100 repetitions at 20%1RM), or mixed-low LOW+-resistance (6 Males, 8 Females, 1x60 repetitions at 20%1RM followed by 1x10-20 repetitions at 40%1RM), of whom 37 (aged 68±5 years) provided sufficient serum samples for BDNF analysis at baseline, 12 week and at 36 weeks (24 weeks detraining)...
2017: Journal of Frailty & Aging
https://www.readbyqxmd.com/read/28223941/enhanced-corticospinal-excitability-and-volitional-drive-in-response-to-shortening-and-lengthening-strength-training-and-changes-following-detraining
#11
Jamie Tallent, Stuart Goodall, Karl C Gibbon, Tibor Hortobágyi, Glyn Howatson
There is a limited understanding of the neurological adaptations responsible for changes in strength following shortening and lengthening resistance training and subsequent detraining. The aim of the study was to investigate differences in corticospinal and spinal responses to resistance training of the tibialis anterior muscle between shortening or lengthening muscle contractions for 4 weeks and after 2 weeks of detraining. Thirty-one untrained individuals were assigned to either shortening or lengthening isokinetic resistance training (4 weeks, 3 days/weeks) or a non-training control group...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28171810/short-versus-long-small-sided-game-training-during-ramadan-in-soccer-players
#12
Hana Baklouti, Noureddine Rejeb, Asma Aloui, Hamdi Jaafar, Achraf Ammar, Hamdi Chtourou, Olivier Girard, Nizar Souissi
OBJECTIVE: To compare the effects of two small-sided game (SSG) training formats (4 × 4 min (SSG-S) and 2 × 8 min (SSG-L)) conducted during Ramadan on Hoff and five-jump (5JT) tests' performances and session rating of perceived exertion (sRPE). DESIGN: Three group, case-control. SETTING: Field tests. PARTICIPANTS: Twenty-four male soccer players were divided into 3 groups: 2 groups undertaking 4 weeks of SSG-S (n = 8) or SSG-L (n = 8) during Ramadan and a control group (n = 8)...
March 2017: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28155720/effects-of-8-week-swimming-training-on-carotid-arterial-stiffness-and-hemodynamics-in-young-overweight-adults
#13
Wen-Xue Yuan, Hai-Bin Liu, Feng-Shan Gao, Yan-Xia Wang, Kai-Rong Qin
BACKGROUND: Exercise has been found to either reduce or increase arterial stiffness. Land-based exercise modalities have been documented as effective physical therapies to decrease arterial stiffness. However, these land-based exercise modalities may not be suitable for overweight individuals, in terms of risks of joint injury. The purpose of this study was to determine the effects of 8-week swimming training and 4-week detraining on carotid arterial stiffness and hemodynamics in young overweight adults...
December 28, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28140647/effects-of-maintaining-different-exercise-intensities-during-detraining-on-aerobic-capacity-in-thoroughbreds
#14
Kazutaka Mukai, Atsushi Hiraga, Toshiyuki Takahashi, Akira Matsui, Hajime Ohmura, Hiroko Aida, James H Jones
OBJECTIVE To determine whether racehorses undergoing regular exercise at 2 intensities or stall rest during a period of reduced training (detraining) would differentially maintain their cardiopulmonary and oxygen-transport capacities. ANIMALS 27 Thoroughbreds. PROCEDURES Horses trained on a treadmill for 18 weeks underwent a period of detraining for 12 weeks according to 1 of 3 protocols: cantering at 70% of maximal rate of oxygen consumption ([Formula: see text]o2max) for 3 min/d for 5 d/wk (canter group); walking for 1 h/d for 5 d/wk (walk group); or stall rest (stall group)...
February 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28134506/effect-of-exercise-training-and-detraining-in-autonomic-modulation-and-cardiorespiratory-fitness-in-breast-cancer-survivors
#15
Andréa D Reis, João B Silva Garcia, Renata R Diniz, Antonio C Silva-Filho, Carlos J Dias, Richard D Leite, Cristiano Mostarda
BACKGROUNDː Breast cancer is one of the leading causes of death worldwide. Heart rate variability has attracted scientific community attention in different pathologies, becoming thus an ultimate importance tool in both clinical and research setting, being a good predictor of cardiac events and mortality risk and also used in physical exercise and sports in general. The aim of the present study was to evaluate 12 weeks of exercise training and six weeks of detraining in cardiorespiratory capacity, and autonomic modulation in breast cancer patients...
January 30, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28120855/the-beneficial-effects-of-aerobic-and-concurrent-training-on-metabolic-profile-and-body-composition-after-detraining-a-1-year-follow-up-in-postmenopausal-women
#16
F E Rossi, T A Diniz, L M Neves, A C S Fortaleza, J Gerosa-Neto, D S Inoue, C Buonani, J M Cholewa, F S Lira, I F Freitas
BACKGROUND/OBJECTIVES: Aerobic and concurrent training (CT, aerobic and strength training) improves body composition and metabolic profile; however, it is not known whether these positive outcomes acquired after aerobic or CT are maintained long term (⩾6 months) after program interruption in postmenopausal women. This study investigated the changes in total and appendicular body composition, bone mineral density and metabolic profile following 16 weeks of aerobic or CT, and through 6 months and 1 year of detraining in postmenopausal women...
January 25, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28116787/effects-of-detraining-on-anthropometry-aerobic-capacity-and-functional-ability-in-adults-with-down-syndrome
#17
P H Boer
BACKGROUND: Structured exercise has shown to improve parameters of functional fitness in adults with Down syndrome (DS). However, few, if any, continue to exercise after exercise intervention studies. Consequently, the purpose of this study was to determine the effects of detraining on anthropometry, aerobic capacity and functional ability of adults with DS. METHODS: In a previous study, forty-two participants either performed 12 weeks of interval training, continuous aerobic training or no training (CON)...
January 24, 2017: Journal of Applied Research in Intellectual Disabilities: JARID
https://www.readbyqxmd.com/read/28095854/the-effects-of-detraining-and-training-on-adipose-tissue-lipid-droplet-in-obese-mice-after-chronic-high-fat-diet
#18
Ju Yong Bae, Jinhee Woo, Hee Tae Roh, Yul Hyo Lee, Kangeun Ko, Sunghwun Kang, Ki Ok Shin
BACKGROUND: It is well known that exercise promotes lipolysis by stimulating the lipid droplet (LD) signaling pathway. However, few studies have been conducted to examine the effect of detraining with high fat diet (HFD) and training effects after long-term HFD. Here, we investigated the effect of detraining and training on adipose tissue LD pathway in diet-induced obese mice after continuous HFD. METHODS: Seventy male C57BL/6 mice were randomly assigned into a Normal diet + Sedentary group (ND, n = 10) or a High-fat diet + Sedentary group (HF, n = 50); in the HF group, obesity was induced by a 45% fat chow for six weeks...
January 17, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28092795/moderate-aerobic-exercise-training-for-improving-reproductive-function-in-infertile-patients-a-randomized-controlled-trial
#19
Behzad Hajizadeh Maleki, Bakhtyar Tartibian
This study investigated for the first time the changes in seminal markers of inflammation, oxidative stress status, semen parameters, sperm DNA integrity as well as pregnancy rate following 24weeks of moderate aerobic exercise in infertile patients. A total of 1026 sedentary men (aged 25-40years) attending the infertility clinic with history of more than one year of infertility, were screened and 419 were randomized to either exercise (EX, n=210) or non-exercise (NON-EX, n=209) groups. Exercise training favorably attenuated seminal markers of both inflammation (IL-1β, IL-6, IL-8, and TNF-α) and oxidative stress (ROS, MDA, 8-Isoprostane) as well as enhanced antioxidant defense system (SOD, catalase and TAC) (P<0...
January 13, 2017: Cytokine
https://www.readbyqxmd.com/read/28071733/an-automated-method-for-large-scale-monitoring-of-seed-dispersal-by-ants
#20
Audrey Bologna, Etienne Toffin, Claire Detrain, Alexandre Campo
Myrmecochory is the process of seed dispersal by ants; however, it is highly challenging to study, mainly because of the small size of both partners and the comparatively large range of dispersal. The mutualistic interaction between ants and seeds involves the former retrieving diaspores, consuming their elaiosome (a nutrient-rich appendage), and the rejection of seeds from the nest. Here, we introduce a semi-automated method based on stitching high resolution images together, allowing the study of myrmecochory in a controlled environment over time...
January 10, 2017: Scientific Reports
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