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Muscle fatigue and recovery

Walquiria Batista Andrade, Jeferson Lucas Jacinto, Douglas Kratki da Silva, Mirela Casonato Roveratti, José Maria Estoche, Douglas Benedito Oliveira, Mario Carlos Welin Balvedi, Rubens A da Silva, Andreo Fernando Aguiar
The purpose of this study was to investigate the effects of L-arginine (L-arg) supplementation on muscle recovery process after a single session of high-intensity resistance exercise (RE). 20 healthy young adult (22.8 ± 3.4 y) participants were assigned to two groups (N = 10/group): a placebo-supplement group (PLA) or a L-arginine-supplement group (ARG). The groups completed a session of high-intensity RE (0h), and three subsequent fatigue tests sessions (at 24, 48 and 72 h post-exercise) to assess the time course of muscle recovery...
March 15, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
Michael J Saunders, Nicholas D Luden, Cash R DeWitt, Melinda C Gross, Amanda Dillon Rios
The effects of protein supplementation on the ratings of energy/fatigue, muscle soreness [ascending (A) and descending (D) stairs], and serum creatine kinase levels following a marathon run were examined. Variables were compared between recreational male and female runners ingesting carbohydrate + protein (CP) during the run (CPDuring , n = 8) versus those that were consuming carbohydrate (CHODuring, n = 8). In a second study, outcomes were compared between subjects who consumed CP or CHO immediately following exercise [CPPost ( n = 4) versus CHOPost ( n = 4)]...
March 10, 2018: Nutrients
Roger Fielding, Linda Riede, James P Lugo, Aouatef Bellamine
Given its pivotal role in fatty acid oxidation and energy metabolism, l-carnitine has been investigated as ergogenic aid for enhancing exercise capacity in the healthy athletic population. Early research indicates its beneficial effects on acute physical performance, such as increased maximum oxygen consumption and higher power output. Later studies point to the positive impact of dietary supplementation with l-carnitine on the recovery process after exercise. It is demonstrated that l-carnitine alleviates muscle injury and reduces markers of cellular damage and free radical formation accompanied by attenuation of muscle soreness...
March 13, 2018: Nutrients
Amanda M Heapy, Martin D Hoffman, Heidie H Verhagen, Samuel W Thompson, Pavitra Dhamija, Fiona J Sandford, Mary C Cooper
Manual therapy (MT) and intermittent pneumatic compression (IPC) are recovery methods used by endurance athletes with little evidence supporting effectiveness. This randomized controlled trial evaluated effectiveness of four daily post-race treatments of a specific MT protocol and IPC compared with supine rest on recovery following an ultramarathon among 56 ultramarathoners. Groups were comparable across all characteristics examined, including post-race plasma creatine kinase concentration. Subject completed timed 400 m runs before the race and on days three, five, seven and 14 post- race, and also provided muscle pain and soreness ratings and fatigue scores immediately before and after treatments, and during the 14 days post- race...
March 7, 2018: Research in Sports Medicine
Yasuhiro Hijikata, Masahisa Katsuno, Keisuke Suzuki, Atsushi Hashizume, Amane Araki, Shinichiro Yamada, Tomonori Inagaki, Daisuke Ito, Akihiro Hirakawa, Fumie Kinoshita, Masahiko Gosho, Gen Sobue
BACKGROUND: Although spinal and bulbar muscular atrophy (SBMA) has been classified as a motor neuron disease, several reports have indicated the primary involvement of skeletal muscle in the pathogenesis of this devastating disease. Recent studies reported decreased intramuscular creatine levels in skeletal muscles in both patients with SBMA and transgenic mouse models of SBMA, which appears to contribute to muscle weakness. OBJECTIVE: The present study aimed to examine the efficacy and safety of oral creatine supplementation to improve motor function in patients with SBMA...
March 5, 2018: JMIR Research Protocols
Michael S Green, Tyler D Martin, Benjamin T Corona
Caffeine use is common among athletes seeking to capitalize on its potential ergogenic effects. Limited research has examined caffeine's effects when utilized following activities that resulted in exercise-induced muscle damage (EIMD). This study examined the effect of caffeine supplementation on uninjured and injured muscle. Eight male and female (N = 16) physically active individuals participated (age: 24.3 ± 4.3 y; height: 173.0 ± 7.0 cm, mass: 75.2 ± 11.5 kg; body fat: 18.2 ± 15.9 %). One leg was assessed under uninjured and injured (100 eccentric quadriceps contractions) conditions following caffeine supplementation (6 mg/kg), with the other leg assessed under both conditions following placebo supplementation...
February 22, 2018: Journal of Strength and Conditioning Research
Abdullah F Alghannam, Javier T Gonzalez, James A Betts
The importance of post-exercise recovery nutrition has been well described in recent years, leading to its incorporation as an integral part of training regimes in both athletes and active individuals. Muscle glycogen depletion during an initial prolonged exercise bout is a main factor in the onset of fatigue and so the replenishment of glycogen stores may be important for recovery of functional capacity. Nevertheless, nutritional considerations for optimal short-term (3-6 h) recovery remain incompletely elucidated, particularly surrounding the precise amount of specific types of nutrients required...
February 23, 2018: Nutrients
Matthew J Brooks, Ameena Hajira, Junaith S Mohamed, Stephen E Alway
Reloading of atrophied muscles after hindlimb suspension unloading (HSU) can induce injury and prolong recovery. Low-impact exercise, such as voluntary wheel running, has been identified as a non-damaging rehabilitation therapy in rodents, but its effects on muscle function, morphology, and satellite cell activity after HSU are unclear. This study tested the hypothesis that low impact wheel running would increase satellite cell proliferation and improve recovery of muscle structure and function after HSU in mice...
February 22, 2018: Journal of Applied Physiology
Roshni Kulkarni, Andra H James, Miranda Norton, Amy Shapiro
BACKGROUND: A high-purity, plasma-derived factor X concentrate (pdFX) is approved to treat hereditary factor X deficiency, an autosomal recessive disorder. OBJECTIVE: Post hoc assessment of pdFX pharmacokinetics, safety, and efficacy in women and girls with hereditary factor X deficiency. PATIENTS/METHODS: Subjects aged ≥12 years with moderate/severe factor X deficiency (plasma factor X activity <5 IU/dL) received on-demand or preventive pdFX (25 IU/kg) for ≤2 years...
February 20, 2018: Journal of Thrombosis and Haemostasis: JTH
Sybille Buchwald-Werner, Ioanna Naka, Manfred Wilhelm, Elivra Schütz, Christiane Schoen, Claudia Reule
Background: Exhaustive exercise causes muscle damage accompanied by oxidative stress and inflammation leading to muscle fatigue and muscle soreness. Lemon verbena leaves, commonly used as tea and refreshing beverage, demonstrated antioxidant and anti-inflammatory properties. The aim of this study was to investigate the effects of a proprietary lemon verbena extract (Recoverben®) on muscle strength and recovery after exhaustive exercise in comparison to a placebo product. Methods: The study was performed as a randomized, placebo-controlled, double-blind study with parallel design...
2018: Journal of the International Society of Sports Nutrition
Ann Blair Kennedy, Nirav Patil, Jennifer L Trilk
Objectives: Massage therapy (MT) enhances recovery by reducing pain and fatigue in able-bodied endurance athletes. In athletes with disabilities, no studies have examined similar MT outcomes, yet participation in sport has increased by >1000 athletes from 1996 to 2016 Olympic games. We examined the effect of MT on pain, sleep, stress, function and performance goals on the bike, as well as quality of life off the bike, in elite paracycling athletes. Methods: This is a quasi-experimental, convergent, parallel, mixed-methods design study of one team, with nine paracycling participants, in years 2015 and 2016...
2018: BMJ Open Sport & Exercise Medicine
Jennifer L Livingston, Nicholas M Tavoukjian
The purpose of this study was to investigate the Little League pitching regulations by measuring the change in lower extremity force production after a pitching performance and the subsequent days of rest required for youth baseball pitchers to recover. Bilateral manual muscle testing of the gluteus maximus, hamstrings, gluteus medius, triceps surae, and quadriceps was conducted using a handheld dynamometer. Fifteen healthy, youth baseball pitchers (9.80 ± 1.08 years) threw a submaximal number of pitches and were tested prior to, immediately after, and for the next four consecutive days...
January 29, 2018: Journal of Strength and Conditioning Research
Kaio F Vitzel, Marco A Fortes, Gabriel Nasri Marzuca-Nassr, Maria V M Scervino, Carlos H Pinheiro, Leonardo R Silveira, Rui Curi
Skeletal muscle electrical stimulation is commonly used for clinical purposes, assisting recovery, preservation, or even improvement of muscle mass and function in healthy and pathological conditions. Additionally, it is a useful research tool for evaluation of skeletal muscle contractile function. It may be applied in vitro, using cell culture or isolated fibers/muscles, and in vivo, using human subjects or animal models (neuromuscular electrical stimulation - NMES). This chapter focuses on the electrical stimulation of the sciatic nerve as a research method for evaluation of the contractile properties of murine hind limb muscles...
2018: Methods in Molecular Biology
Okba Selmi, Bruno Gonçalves, Ibrahim Ouergui, Jaime Sampaio, Anissa Bouassida
This study aimed to assess the effects of the total quality of recovery and well-being indices (self-ratings of sleep during the preceding night, stress, fatigue and delayed onset muscle soreness) on rating of perceived exertion (RPE) and physical enjoyment (PE) during small-sided games. A total of 20 professional soccer players (25 ± 0.8 years) completed four 5-a-side game sessions of 25-min duration each (4 × 4 min work with 3-min passive recovery in-between). All variables were collected before each game session with the exception of RPE and Physical Activity Enjoyment Scale that were collected after...
January 28, 2018: Research in Sports Medicine
Paul T Morgan, Joanna L Bowtell, Anni Vanhatalo, Andrew M Jones, Stephen J Bailey
AIM: Acetaminophen is a commonly used medicine for pain relief and emerging evidence suggests that it may improve endurance exercise performance. This study investigated some of the physiological mechanisms by which acute acetaminophen ingestion might blunt muscle fatigue development. METHODS: Thirteen active males completed 60 × 3 s maximum voluntary contractions (MVC) of the knee extensors with each contraction separated by a 2 s passive recovery period...
January 13, 2018: European Journal of Applied Physiology
Kamonwan Tangvoraphonkchai, Andrew Davenport
Hemodialysis patients (HD) commonly report fatigue. Muscle wasting (sarcopenia) and extracellular water (ECW) excess have been reported to be associated with fatigue in other conditions. We wished to determine whether muscle loss and ECW excess were associated with fatigue in HD patients. Patients completed the Multidimensional Fatigue Inventory (MFI), Beck Depression Inventory-II (BDI-II), Patient Health Questionnaires (PHQ-9) and recorded their post-dialysis recovery time. Sessional dialysis data were recorded along with pre- and post-dialysis multi-frequency bioimpedance assessments (MFBIA)...
January 10, 2018: Therapeutic Apheresis and Dialysis
Ester Hanya, Abram Katz
AIM: Elevated glycogen content in muscle delays fatigue during exercise. We examined if increasing muscle temperature during recovery from exercise affects glycogen synthesis and muscle performance during a subsequent bout of exercise. METHODS: Isolated mouse extensor digitorum longus muscles were stimulated electrically to perform repeated tetanic contractions until force decreased to 40% of initial at 25°C. Thereafter muscles recovered for 120 min at 25°C (control), 120 min at 35°C, or 60 min at 35°C followed by 60 min at 25°C...
January 3, 2018: Acta Physiologica
Alexandra F Yacyshyn, Jane Nettleton, Chris J McNeil
PURPOSE: It is uncertain if sex influences central fatigue as the reduction in voluntary activation (VA) was not different between the sexes for elbow flexors (EFs) but greater in males compared to females for knee extensors. This disparity could result from the facilitatory and inhibitory effects of group III/IV muscle afferent effects on flexor vs. extensor motoneurons, respectively. The purpose of this study was to examine central fatigue and motoneuron responsiveness of EFs and elbow extensors (EEs) in males and females...
December 28, 2017: Medicine and Science in Sports and Exercise
Brendan R Scott, Katie M Slattery, Dean V Sculley, Ben J Dascombe
This study aimed to determine whether performing resistance exercise in hypoxia affects markers of physical performance, perceptual responses, and neuromuscular function. Fourteen male subjects (age: 24.6 ± 2.7 yr; height: 179.7 ± 5.9 cm; body mass: 84.6 ± 11.6 kg) with >2 years resistance training experience performed moderate-load resistance exercise in two conditions; normoxia (FIO2 = 0.21) and hypoxia (FIO2 = 0.16). Resistance exercise comprised 3 sets of 10 repetitions of back squats and deadlifts at 60% of 1RM, with 60s inter-set rest...
December 11, 2017: Journal of Strength and Conditioning Research
Joe Roth, Taylor Szczygiel, Mary Moore, Paul O'Connor, Jeffrey Edwards, Naveen Sharma, Ryan Pettit-Mee, Micah Zuhl
The purpose of this study was to determine if biological markers of muscle damage and inflammation coincide with subjective measures of muscle fatigue and sleep quality among Division I collegiate wrestlers. The goal was to provide practitioners with noninvasive techniques to evaluate a wrestlers inflammatory state. METHODS: Subjects from the Central Michigan University Division I collegiate wrestling team (n=6) were analyzed on six separate occasions throughout the course of the competitive season and post season...
December 11, 2017: Journal of Strength and Conditioning Research
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