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European Journal of Applied Physiology

Emily Metcalf, Amanda D Hagstrom, Paul W Marshall
PURPOSE: We examined differences between trained males and females in measures of muscular fatigability and central motor output after a resistance exercise session. METHODS: Sixteen trained males (n = 8) and females (n = 8) participated in the study. Knee extensor maximal torque and rate of torque development were measured before and after the exercise session, and the twitch interpolation technique was used during the maximal efforts to derive measures of voluntary activation and muscle contractility by supramaximal stimulation of the femoral nerve using 10 and 100 Hz doublets...
October 15, 2018: European Journal of Applied Physiology
Megan A Bryanton, Martin Bilodeau
PURPOSE: The purpose of this investigation was to evaluate alterations in muscular effort and temporal characteristics of their activity during the sit-to-stand (STS) due to isolated fatiguing of the knee extensors, as indicated by declines in torque output. METHODS: Surface electromyography of the lower extremity was recorded in healthy young (n = 11) and older (n = 11) adults as they ascended from a seated position, before and after dynamic knee extension exercise...
October 13, 2018: European Journal of Applied Physiology
S Chacaroun, I Vega-Escamilla Y Gonzalez, P Flore, S Doutreleau, Samuel Verges
PURPOSE: The aim of this study was to assess the acute cardiorespiratory as well as muscle and cerebral tissue oxygenation responses to submaximal constant-load (CL) and high-intensity interval (HII) cycling exercise performed in normoxia and in hypoxia at similar intensity, reproducing whole-body endurance exercise training sessions as performed in sedentary and clinical populations. METHODS: Healthy subjects performed two CL (30 min, 75% of maximal heart rate, n = 12) and two HII (15 times 1-min high-intensity exercise-1-min passive recovery, n = 12) cycling exercise sessions in normoxia and in hypoxia [mean arterial oxygen saturation 76 ± 1% (clamped) during CL and 77 ± 5% (inspiratory oxygen fraction 0...
October 12, 2018: European Journal of Applied Physiology
Laura J Wilson, Lygeri Dimitriou, Frank A Hills, Marcela B Gondek, Emma Cockburn
PURPOSE: The use of cryotherapy as a recovery intervention is prevalent amongst athletes. Performance of high volume, heavy load resistance exercise is known to result in disturbances of muscle function, perceptual responses and blood borne parameters. Therefore, this study investigated the influence of cold water immersion (CWI), whole body cryotherapy (WBC) or a placebo (PL) intervention on markers of recovery following an acute resistance training session. METHODS: 24 resistance trained males were matched into a CWI (10 min at 10 °C), WBC (3- and 4 min at - 85 °C) or PL group before completing a lower body resistance training session...
October 11, 2018: European Journal of Applied Physiology
Clint R Bellenger, Rebecca L Thomson, Eileen Y Robertson, Kade Davison, Maximillian J Nelson, Laura Karavirta, Jonathan D Buckley
The original version of this article unfortunately contained a mistake. The presentation of Equation was incorrect.
October 11, 2018: European Journal of Applied Physiology
Maya Hioki, Nana Kanehira, Teruhiko Koike, Akira Saito, Hideyuki Takahashi, Kiyoshi Shimaoka, Hisataka Sakakibara, Yoshiharu Oshida, Hiroshi Akima
PURPOSE: Intramyocellular lipid (IMCL) is influenced by physical exercise; however, whether the habitual level of physical activity affects resting IMCL content remains unclear. The purpose of this study was to determine the relationship between physical activity levels and resting IMCL content in young and older adults. METHODS: In total, 15 nonobese young adults (21.0 ± 0.0 years) and 15 older adults (70.7 ± 3.8 years) were recruited. Time spent performing physical activities for 10 days was assessed using a three-dimensional ambulatory accelerometer, and intensity was categorized as light [< 3...
October 10, 2018: European Journal of Applied Physiology
Hiroaki Hobara, Satoru Hashizume, Yoshiyuki Kobayashi, Yuta Namiki, Ralf Müller, Johannes Funken, Wolfgang Potthast
PURPOSE: Although sprinters with unilateral (UTF) and bilateral transfemoral (BTF) amputations and functional impairments (FIs) without amputation were allocated into different classifications because of the recent revision of the International Paralympic Committee Athletics Rules and Regulations, it is unclear whether running mechanics differ among the three groups. The aim of this study was to investigate the differences in the spatiotemporal parameters of the three groups during 100-m sprint in official competitions...
October 8, 2018: European Journal of Applied Physiology
Milena Samora, André L Teixeira, Jeann L Sabino-Carvalho, Lauro C Vianna
PURPOSE: To investigate the effect of isolated muscle metaboreflex activation on spontaneous cardiac baroreflex sensitivity (cBRS), and to characterize the potential sex-related differences in this interaction in young healthy subjects. METHODS: 40 volunteers (20 men and 20 women, age: 22 ± 0.4 year) were recruited. After 5-min rest period, the subjects performed 90 s of isometric handgrip exercise at 40% of maximal voluntary contraction followed by 3 min of post-exercise ischemia (PEI)...
October 6, 2018: European Journal of Applied Physiology
Henrik Bjarke Vaegter, Louise Kathrine Bjerregaard, Mia-Maja Redin, Sara Hartung Rasmussen, Thomas Graven-Nielsen
PURPOSE: Exercise decreases pain sensitivity known as exercise-induced hypoalgesia (EIH). However, the consistency of EIH after an acute exercise protocol based on subjective ratings of perceived exertion has been questioned. Objectives were to compare the effect on pressure pain thresholds (PPTs) after bicycling with work-rate at the lactate threshold compared with quiet rest, and investigate between-session reliability of EIH. METHODS: Thirty-four healthy subjects completed three sessions with 7 days in-between...
October 5, 2018: European Journal of Applied Physiology
Eleftherios Kellis
INTRODUCTION: Examination of the mechanical behavior of the hamstrings when acting as antagonists provides information about loading of this muscle group and its role for joint stability during forceful quadriceps contractions. The aim of this study was to quantify biceps femoris long head fascicle length (FL), angle of pennation (PA) and distal tendon/aponeurosis strain during maximum voluntary contraction efforts of the knee extensors using real-time ultrasound. METHODS: Fourteen participants performed passive joint movements and maximum voluntary knee extension and flexion efforts of the knee flexors at 0°, 45° and 90° of knee flexion...
October 3, 2018: European Journal of Applied Physiology
Peter A Falgiano, Trevor L Gillum, Zach J Schall, Harrison R Strag, Matthew R Kuennen
INTRODUCTION: Curcumin reduces gut barrier damage and plasma cytokine responses to exertional heat stress. However, the role of peripheral blood mononuclear cell (PBMC) in this response remains unclear. PURPOSE: This work investigated the effect of 3 days of 500 mg/day dietary curcumin supplementation on PBMC responses to exertional heat stress in non-heat acclimated humans. METHODS: Eight participants ran (65% VO2max ) for 60 min in an environmental chamber (37 °C/25% RH) two times (curcumin/placebo)...
October 1, 2018: European Journal of Applied Physiology
Astrid Zech, Stephanie Meining, Kirsten Hötting, Dominik Liebl, Klaus Mattes, Karsten Hollander
PURPOSE: Although barefoot balancing has shown to be more challenging compared to shod balancing, it is still unclear whether this may also influence the balance learning effects. The purpose of this study was to explore the impact of barefoot and shod exercising on learning of a dynamic balance task. METHODS: Sixty healthy and physically active adults (mean age 25.3 ± 3.4 years) were randomly allocated into one of three groups (barefoot, shod and controls)...
September 28, 2018: European Journal of Applied Physiology
Martin D Hoffman, Rhiannon M J Snipe, Ricardo J S Costa
PURPOSE: To examine if ad libitum drinking will adequately support hydration during exertional heat stress. METHODS: Ten endurance-trained runners ran for 2 h at 60% of maximum oxygen uptake under different conditions. Participants drank water ad libitum during separate trials at mean ambient temperatures of 22 °C, 30 °C and 35 °C. Participants also completed three trials at a mean ambient temperature of 35 °C while drinking water ad libitum in all trials, and with consumption of programmed glucose or whey protein hydrolysate solutions to maintain euhydration in two of these trials...
September 28, 2018: European Journal of Applied Physiology
Eric M Bugera, Todd A Duhamel, Jason D Peeler, Stephen M Cornish
PURPOSE: Blood flow restricted resistance exercise (BFR-RE) is an emerging hypertrophy training modality. A complete profile of its mechanisms of action has yet to be elucidated. Cytokines are universal intercellular messengers. Recent research has implicated certain cytokines (termed "myokines") in skeletal muscle hypertrophy pathways; however, little research has been conducted on the systemic myokine response to BFR-RE as potential hypertrophic biomarkers. Therefore, this project was conducted to determine any differences in the systemic myokine response between BFR-RE and control conditions...
September 22, 2018: European Journal of Applied Physiology
Irsa Talib, Kenneth Sundaraj, Chee Kiang Lam, Jawad Hussain, Md Asraf Ali
PURPOSE: Crosstalk in myographic signals is a major hindrance to the understanding of local information related to individual muscle function. This review aims to analyse the problem of crosstalk in electromyography and mechanomyography. METHODS: An initial search of the SCOPUS database using an appropriate set of keywords yielded 290 studies, and 59 potential studies were selected after all the records were screened using the eligibility criteria. This review on crosstalk revealed that signal contamination due to crosstalk remains a major challenge in the application of surface myography techniques...
September 21, 2018: European Journal of Applied Physiology
Tatsuro Amano, Anna Igarashi, Naoto Fujii, Daichi Hiramatsu, Yoshimitsu Inoue, Narihiko Kondo
PURPOSE: This study investigated the influence of β-adrenergic receptor blockade on sweating during bilateral static knee extension (KE) and lateral isometric handgrip (IH) exercises followed by post-exercise muscle ischemia (PEMI) in habitually trained individuals. METHOD: Ten habitually trained men (maximum oxygen uptake, 57.1 ± 3.4 ml kg-1  min-1 ) were mildly heated by increasing their skin temperature, and bilateral KE or lateral IH exercises at an intensity of 60% maximum voluntary contraction were subsequently performed for 1 min, followed by PEMI to stimulate muscle metaboreceptors for 2 min...
September 20, 2018: European Journal of Applied Physiology
Ibai Garcia-Tabar, Jean P Eclache, José F Aramendi, Esteban M Gorostiaga
No abstract text is available yet for this article.
September 20, 2018: European Journal of Applied Physiology
Susan A Ward
PURPOSE: This article is in response to the Letter of Garcia-Tabar et al. [Eur J Appl Physiol (in press), 2018] relating to the issue of post-test sensor calibration 'verification'. This issue is poorly addressed in contemporary patient-related position statements on cardiopulmonary exercise testing (CPET). METHODS: Post-test sensor calibration verification approaches were compared. RESULT: The potential impact on data quality of changing sensor calibration during the course of an exercise test was described...
September 20, 2018: European Journal of Applied Physiology
Dahee Jung, Yung-Bin Kim, Jeong-Beom Lee, Ahmad Munir Che Muhamed, Joo-Young Lee
PURPOSE: We investigated the effects of humidity on regional sweating secretion and active sweat gland density on the scalp during passive heating in hot environments. METHODS: Eight male subjects shaved their heads prior to expose to dry (30%RH; H30%) and humid (85%RH; H85%) conditions at an air temperature of 32 °C. Total sweat rate, local sweat rates (frontal, vertex, temporal, and occipital regions), active sweat glands on the scalp (2 frontal, 2 parietal, 2 temporal, 1 occipital, and 1 vertex), and rectal and skin temperatures were measured during leg immersion in 42 °C water for 60 min...
September 12, 2018: European Journal of Applied Physiology
David J Lim, Jae J Kim, Greg D Marsh, Glen R Belfry
PURPOSE: The purpose was to compare the singular and combined effects of 5 s breath holds (BH) and 5 s sprints, every 30 s, during continuous high-intensity exercise, on ventilation ([Formula: see text]), oxygen uptake ([Formula: see text]O2 ) and associated kinetics (τ), carbon dioxide production ([Formula: see text]CO2 ), and arterialized-capillary lactate concentration ([La- ]). METHODS: Ten men (24 ± 3 years) performed 4-6 min ergometer protocols that included a step-transition from 20 W to a power output of 50% of the difference between lactate threshold and [Formula: see text]O2 peak (Δ50%) including: (1) a continuous protocol (CONT) with free breathing, (2) an intermittent BH protocol (CONT-BH); repeated cycles of 5 s BH: 25 s free breathing, (3) a Fartlek protocol (Fartlek); repeated 5 s at peak aerobic power output: 25 s at Δ50%; (4) combining the 5 s Fartlek and CONT-BH protocol (Fartlek-BH)...
September 11, 2018: European Journal of Applied Physiology
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