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Muscle fatigue and recovery

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https://www.readbyqxmd.com/read/28194519/electromechanical-delays-during-a-fatiguing-exercise-and-recovery-in-patients-with-myotonic-dystrophy-type-1
#1
Fabio Esposito, Emiliano Cè, Susanna Rampichini, Elena Monti, Eloisa Limonta, Barbara Fossati, Giovanni Meola
PURPOSE: The partitioning of the electromechanical delay by an electromyographic (EMG), mechanomyographic (MMG) and force combined approach can provide further insight into the electrochemical and mechanical processes involved with skeletal muscle contraction and relaxation. The aim of the study was to monitor by this combined approach the changes in delays' electrochemical and mechanical components throughout a fatiguing task and during recovery in patients with myotonic dystrophy type 1 (DM1), who present at the skeletal muscle level fibres rearrangement, muscle weakness and myotonia, especially in the distal muscles...
February 14, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28177718/the-physiological-response-to-cold-water-immersion-following-a-mixed-martial-arts-training-session
#2
Angus Lindsay, Sam Carr, Sean Cross, Carl Petersen, John G Lewis, Steven P Gieseg
Combative sport is one of the most physically intense forms of exercise, yet the effect of recovery interventions has been largely unexplored. We investigated the effect of cold water immersion on structural, inflammatory and physiological stress biomarkers following a mixed martial arts contest preparation training session in comparison to passive recovery. Semi-professional MMA competitors (n=15) were randomly assigned to a cold water immersion (15 min at 10°C) or passive recovery protocol (ambient air) completed immediately following a contest preparation training session...
January 17, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28177707/dietary-fish-oil-delays-hypoxic-skeletal-muscle-fatigue-and-enhances-caffeine-stimulated-contractile-recovery-in-the-rat-in-vivo-hindlimb
#3
Gregory E Peoples, Peter L McLennan
Oxygen efficiency influences skeletal muscle contractile function during physiological hypoxia. Dietary fish oil, providing docosahexaenoic acid (DHA), reduces the oxygen cost of muscle contraction. This study used autologous perfused rat hindlimb model to examine the effects of a fish oil diet on skeletal muscle fatigue during an acute hypoxic challenge. Male Wistar rats were fed a diet rich in saturated fat (SF), long chain (LC) n-6 polyunsaturated fatty acids (n-6 PUFA), or LC n-3 PUFA DHA from fish oil (FO) (8weeks)...
January 26, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28150163/fatigue-and-recovery-in-rugby-a-review
#4
REVIEW
Francisco Tavares, Tiaki Brett Smith, Matthew Driller
The physical demands and combative nature of rugby lead to notable levels of muscle damage. In professional rugby, athletes only have a limited timeframe to recover following training sessions and competition. Through the implementation of recovery strategies, sport scientists, practitioners and coaches have sought to reduce the effect of fatigue and allow athletes to recover faster. Although some studies demonstrate that recovery strategies are extensively used by rugby athletes, the research remains equivocal concerning the efficacy of recovery strategies in rugby...
February 2, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28121183/betalain-rich-concentrate-supplementation-improves-exercise-performance-and-recovery-in-competitive-triathletes
#5
RANDOMIZED CONTROLLED TRIAL
Cristhian F Montenegro, David A Kwong, Zev A Minow, Brian A Davis, Christina F Lozada, Gretchen A Casazza
We aimed to determine the effects of a betalain-rich concentrate (BRC) of beetroots, containing no sugars or nitrates, on exercise performance and recovery. Twenty-two (9 men and 13 women) triathletes (age, 38 ± 11 years) completed 2 double-blind, crossover, randomized trials (BRC and placebo) starting 7 days apart. Each trial was preceded by 6 days of supplementation with 100 mg·day(-1) of BRC or placebo. On the 7th day of supplementation, exercise trials commenced 120 min after ingestion of 50 mg BRC or placebo and consisted of 40 min of cycling (75 ± 5% maximal oxygen consumption) followed by a 10-km running time trial (TT)...
February 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28090140/influence-of-warm-up-duration-and-recovery-interval-prior-to-exercise-on-anaerobic-performance
#6
M Frikha, N Chaâri, N Mezghanni, N Souissi
The purpose of the study was to determine the impact of different active warm-up (AWU) durations and the rest interval separating it from exercise on anaerobic performance. Eleven male physical education students (22.6 ± 2.52 years; 179.2 ± 4.3 cm; 82.5 ± 9.7 kg; mean ± SD) participated in a cross-over randomized study, and they all underwent the Wingate test after three AWU durations: 5 min (AWU5), 15 min (AWU15) and 20 min (AWU20), with recovery (WREC) or without a recovery interval (NREC) separating the AWU and anaerobic exercise performance...
December 2016: Biology of Sport
https://www.readbyqxmd.com/read/28086894/c60-fullerene-as-promising-therapeutic-agent-for-correcting-and-preventing-skeletal-muscle-fatigue
#7
Yurij I Prylutskyy, Inna V Vereshchaka, Andriy V Maznychenko, Nataliya V Bulgakova, Olga O Gonchar, Olena A Kyzyma, Uwe Ritter, Peter Scharff, Tomasz Tomiak, Dmytro M Nozdrenko, Iryna V Mishchenko, Alexander I Kostyukov
BACKGROUND: Bioactive soluble carbon nanostructures, such as the C60 fullerene can bond with up to six electrons, thus serving by a powerful scavenger of reactive oxygen species similarly to many natural antioxidants, widely used to decrease the muscle fatigue effects. The aim of the study is to define action of the pristine C60 fullerene aqueous colloid solution (C60FAS), on the post-fatigue recovering of m. triceps surae in anaesthetized rats. RESULTS: During fatigue development, we observed decrease in the muscle effort level before C60FAS administration...
January 13, 2017: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/28060035/etiology-and-recovery-of-neuromuscular-fatigue-following-simulated-soccer-match-play
#8
Kevin Thomas, Jack Dent, Glyn Howatson, Stuart Goodall
PURPOSE: We profiled the etiology and recovery of neuromuscular fatigue post-simulated-soccer-match-play. METHODS: Fifteen semi-professional players completed a 90 min simulated soccer match. Pre-, immediately-post and at 24, 48 and 72 h participants completed a battery of neuromuscular, physical and perceptual tests. Perceived fatigue and muscle soreness were assessed via visual analogue scales. Maximum voluntary contraction (MVC) and twitch responses to electrical (femoral nerve) and magnetic (motor cortex) stimulation during isometric knee-extensor contractions and at rest were measured to assess central (voluntary activation, VA) and peripheral (quadriceps potentiated twitch force, Qtw,pot) fatigue, and responses to single and paired-magnetic stimuli were assessed to quantify corticospinal excitability and short-intracortical inhibition (SICI), respectively...
January 3, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28054262/does-photobiomodulation-therapy-is-better-than-cryotherapy-in-muscle-recovery-after-a-high-intensity-exercise-a-randomized-double-blind-placebo-controlled-clinical-trial
#9
Thiago De Marchi, Vinicius Mazzochi Schmitt, Guilherme Pinheiro Machado, Juliane Souza de Sene, Camila Dallavechia de Col, Olga Tairova, Mirian Salvador, Ernesto Cesar Pinto Leal-Junior
This study aimed to determine the effectiveness of photobiomodulation therapy (PBMT) and cryotherapy, in isolated and combined forms, as muscle recovery techniques after muscle fatigue-inducing protocol. Forty volunteers were randomly divided into five groups: a placebo group (PG); a PBMT group (PBMT); a cryotherapy group (CG); a cryotherapy-PBMT group (CPG); and a PBMT-cryotherapy group (PCG). All subjects performed four sessions at 24-h intervals, during which they submitted to isometric assessment (MVC) and blood collection in the pre-exercise period, and 5 and 60 min post-exercise, while the muscle fatigue induction protocol occurred after the pre-exercise collections...
February 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28042020/strength-training-to-enhance-early-recovery-after-hematopoietic-stem-cell-transplantation
#10
Eileen Danaher Hacker, Eileen Collins, Chang Park, Tara Peters, Pritesh Patel, Damiano Rondelli
Intensive cancer treatment followed by hematopoietic stem cell transplantation (HCT) results in moderate to severe fatigue and physical inactivity, leading to diminished functional ability. The purpose of this study was to determine the efficacy of an exercise intervention, strength training to enhance early recovery (STEER), on physical activity, fatigue, muscle strength, functional ability, and quality of life after HCT. This single-blind, randomized, clinical trial compared strength training (n = 33) to usual care plus attention control with health education (UC + AC with HE) (n = 34)...
December 29, 2016: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28040567/effects-of-age-and-sex-on-fatigability-and-recovery-from-a-sustained-maximal-isometric-voluntary-contraction
#11
Rima Solianik, Lina Kreivėnaitė, Vytautas Streckis, Dalia Mickevičienė, Albertas Skurvydas
The aim was to assess the effects of sex and age on fatigability and recovery from sustained maximal voluntary contraction (MVC) of the knee extensor muscles. The central (central activation ratio (CAR) and electrical activity amplitude) and peripheral (electrically evoked torque and muscle contractile properties) factors contributing to fatigue and recovery of 24 young adults (12 males) aged 23.2±3.6years and 20 older adults (12 males) aged 70.6±4.4years were compared. The increase in central and peripheral fatigue was greater (p⩽0...
February 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28028847/muscle-excitability-during-sustained-maximal-voluntary-contractions-by-a-separate-analysis-of-the-m-wave-phases
#12
J Rodriguez-Falces, N Place
This study was designed to examine separately the changes in the first and second phases of the muscle compound action potential (M-wave) during and after a sustained 3-minutes maximal voluntary contraction (MVC). M-waves were evoked by supramaximal single shocks to the femoral nerve given at 10-seconds intervals throughout a sustained isometric 3-minutes MVC and also during six brief MVCs performed throughout a 30-minutes recovery period. The amplitude, duration, and area of the M-wave first and second phases, together with muscle conduction velocity and force, were measured...
December 28, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28018244/differences-in-muscle-oxygenation-perceived-fatigue-and-recovery-between-long-track-and-short-track-speed-skating
#13
Florentina J Hettinga, Marco J Konings, Chris E Cooper
Due to the technical nature of speed skating, that is affecting physiological mechanisms such as oxygenation and blood flow, this sport provides a unique setting allowing us to uncover novel mechanistic insights of the physiological response to exercise in elite middle-distance and endurance sports. The present study aimed to examine the influence of skating mode (short-track vs. long-track) on muscle oxygenation, perceived fatigue, and recovery in elite speed skating. Muscle oxygenation of 12 talented short-track speed skaters was continuously monitored during a long-track (LT) and a short-track (ST) skating time-trial of maximal effort using near-infrared spectroscopy (NIRS) on the m...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/28018233/carbonic-anhydrase-iii-is-expressed-in-mouse-skeletal-muscles-independent-of-fiber-type-specific-myofilament-protein-isoforms-and-plays-a-role-in-fatigue-resistance
#14
Han-Zhong Feng, J-P Jin
Carbonic anhydrase III (CAIII) is a metabolic enzyme and a regulator for intracellular pH. CAIII has been reported with high level expression in slow twitch skeletal muscles. Here we demonstrate that CAIII is expressed in multiple slow and fast twitch muscles of adult mouse independent of the expression of myosin isoforms. Expressing similar fast type of myofilament proteins, CAIII-positive tibial anterior (TA) muscle exhibits higher tolerance to fatigue than that of CAIII-negative fast twitch extensor digitorum longus (EDL) muscle in in situ contractility studies...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/28000230/mitochondrial-capacity-muscle-endurance-low-energy-in-friedreich-ataxia
#15
Hannah M Bossie, T Bradley Willingham, Robbi A Van Schoick, Patrick J O'Connor, Kevin K McCully
INTRODUCTION: We noninvasively evaluated skeletal muscle mitochondrial capacity, muscle-specific endurance, and energy/fatigue feelings in persons with Friedreich ataxia (FRDA) and able-bodied controls (AB). METHODS: Forearm mitochondrial capacity was measured in FRDA (n=16) and AB (n=10) using the rate of recovery of oxygen consumption after electrical stimulation with near-infrared spectroscopy. Mechanomyography (MMG) assessed muscle endurance after electrical stimulation for 3-minutes at 2Hz, 4Hz, and 6Hz...
December 21, 2016: Muscle & Nerve
https://www.readbyqxmd.com/read/27981782/neuromuscular-changes-and-the-rapid-adaptation-following-a-bout-of-damaging-eccentric-exercise
#16
S Goodall, K Thomas, M Barwood, K Keane, J T Gonzalez, A St Clair Gibson, G Howatson
INTRODUCTION: An initial bout of eccentric exercise is known to protect against muscle damage following a repeated bout of the same exercise; however, the neuromuscular adaptations owing to this phenomenon are unknown. AIM: To determine whether neuromuscular disturbances are modulated following a repeated bout of eccentric exercise. METHODS: Following eccentric exercise performed with the elbow flexors, we measured maximal voluntary force, resting twitch force, muscle soreness, creatine kinase (CK) and voluntary activation (VA) using motor point and motor cortex stimulation at baseline, immediately post-exercise and at 1, 2, 3, 4 and 7 days post-exercise on two occasions, separated by 3 weeks...
December 16, 2016: Acta Physiologica
https://www.readbyqxmd.com/read/27973384/effects-of-fatiguing-constant-versus-alternating-intensity-intermittent-isometric-muscle-actions-on-maximal-torque-and-neuromuscular-responses
#17
C M Smith, T J Housh, E C Hill, K C Cochrane, N Dm Jenkins, R J Schmidt, G O Johnson
OBJECTIVE: To determine the effects of constant versus alternating applications of torque during fatiguing, intermittent isometric muscle actions of the leg extensors on maximal voluntary isometric contraction (MVIC) torque and neuromuscular responses. METHODS: Sixteen subjects performed two protocols, each consisting of 50 intermittent isometric muscle actions of the leg extensors with equal average load at a constant 60% MVIC or alternating 40 then 80% (40/80%) MVIC with a work-to-rest ratio of 6-s on and 2-s off...
December 14, 2016: Journal of Musculoskeletal & Neuronal Interactions
https://www.readbyqxmd.com/read/27973383/effect-of-sex-on-torque-recovery-emg-and-mmg-responses-to-fatigue
#18
E C Hill, T J Housh, C M Smith, K C Cochrane, N Dm Jenkins, J T Cramer, R J Schmidt, G O Johnson
OBJECTIVE: The purpose of the present investigation was to examine the effect of sex on maximal voluntary isometric contraction (MVIC) torque and the EMG and MMG responses as a result of fatiguing, intermittent, submaximal (65% of MVIC), isometric elbow flexion muscle contractions. METHODS: Eighteen men and women performed MVIC trials before (pretest), after (posttest), and 5-min after (5-min recovery) performing 50 intermittent, submaximal isometric muscle contractions...
December 14, 2016: Journal of Musculoskeletal & Neuronal Interactions
https://www.readbyqxmd.com/read/27939350/quantifying-the-history-dependency-of-muscle-recovery-from-a-fatiguing-intermittent-task
#19
Ehsan Rashedi, Maury A Nussbaum
Muscle fatigue and recovery are complex processes influencing muscle force generation capacity. While fatigue reduces this capacity, recovery acts to restore the unfatigued muscle state. Many factors can potentially affect muscle recovery, and among these may be a task dependency of recovery following an exercise. However, little has been reported regarding the history dependency of recovery after fatiguing contractions. We examined the dependency of muscle recovery subsequent to four different histories of fatiguing muscle contractions, imposed using two cycle times (30 and 60s) during low to moderate levels (15% and 25% of maximum voluntary contraction (MVC)) of intermittent static exertions involving index finger abduction...
January 25, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/27932676/recovery-of-central-and-peripheral-neuromuscular-fatigue-after-exercise
#20
Timothy John Carroll, Janet L Taylor, Simon C Gandevia
Sustained physical exercise leads to a reduced capacity to produce voluntary force that typically outlasts the exercise bout. This "fatigue" can be due both to impaired muscle function, termed "peripheral fatigue", and a reduction in the capacity of the central nervous system to activate muscles, termed "central fatigue". In this mini-review we consider the factors that determine the recovery of voluntary force generating capacity after various types of exercise. After brief, high-intensity exercise there is typically a rapid restitution of force that is due to recovery of central fatigue (typically within 2min) and aspects of peripheral fatigue associated with excitation-contraction coupling and re-perfusion of muscles (typically within 3-5 min)...
December 8, 2016: Journal of Applied Physiology
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