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European Journal of Applied Physiology

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https://www.readbyqxmd.com/read/29242994/selective-effects-of-different-fatigue-protocols-on-the-function-of-upper-body-muscles-assessed-through-the-force-velocity-relationship
#1
Amador García-Ramos, Alejandro Torrejón, Belén Feriche, Antonio J Morales-Artacho, Alejandro Pérez-Castilla, Paulino Padial, Slobodan Jaric
PURPOSE: This study explored the feasibility of the force-velocity relationship (F-V) to detect the acute effects of different fatigue protocols on the selective changes of the maximal capacities of upper body muscles to produce force, velocity, and power. METHODS: After determining the bench press one-repetition maximum (1RM), participants' F-V relationships were assessed during the bench press throw exercise on five separate sessions after performing one of the following fatiguing protocols: 60%1RM failure, 60%1RM non-failure, 80%1RM failure, 80%1RM non-failure, and no-fatigue...
December 14, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29234917/cardiovascular-and-metabolic-responses-during-indoor-climbing-and-laboratory-cycling-exercise-in-advanced-and-%C3%A3-lite-climbers
#2
Eloisa Limonta, Alfredo Brighenti, Susanna Rampichini, Emiliano Cè, Federico Schena, Fabio Esposito
PURPOSE: To validate heart rate (f H) as an effective indicator of the aerobic demands of climbing, the f H vs oxygen uptake ([Formula: see text]) relationship determined during cycling exercise and climbing on a circular climbing treadwall was compared. Possible differences in maximum aerobic characteristics between advanced and élite climbers were also assessed. METHODS: Seven advanced and six élite climbers performed a discontinuous incremental test on a cycle ergometer and a similar test on a climbing treadwall...
December 12, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29234916/do-acute-effects-of-exercise-on-vascular-function-predict-adaptation-to-training
#3
Ellen A Dawson, N Timothy Cable, Daniel J Green, Dick H J Thijssen
PURPOSE: No previous study has explored the importance of exercise-induced changes in vascular function to prolonged adaptations. Therefore, the purpose was to explore the within-subject relationship between the acute post-exercise change in brachial artery endothelial function (flow-mediated dilation, FMD) and the change in resting FMD after a 2-week exercise training in healthy volunteers. METHODS: Twenty one healthy, young men (24 ± 5 years) underwent assessment of brachial artery FMD using high-resolution ultrasound before and after 30-min of moderate-intensity cycle exercise (80% maximal heart rate)...
December 12, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29234915/the-impact-of-exertional-heat-stress-on-gastrointestinal-integrity-gastrointestinal-symptoms-systemic-endotoxin-and-cytokine-profile
#4
Rhiannon M J Snipe, Anthony Khoo, Cecilia M Kitic, Peter R Gibson, Ricardo J S Costa
PURPOSE: The study aimed to determine the effects of exertional-heat stress on gastrointestinal integrity, symptoms, systemic endotoxin and inflammatory responses; and assess the relationship between changes in body temperature and gastrointestinal perturbations. METHODS: Ten endurance runners completed 2 h running at 60% [Formula: see text]O2max in hot (HOT: 35 °C) and temperate (TEMP: 22 °C)-ambient conditions. Rectal temperature (T re) and gastrointestinal symptoms were recorded every 10 min during exercise...
December 12, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29224176/validation-of-a-method-for-estimating-energy-expenditure-during-walking-in-middle-aged-adults
#5
Nathan Caron, Teddy Caderby, Nicolas Peyrot, Chantal Verkindt, Georges Dalleau
PURPOSE: The aim of this study was to test the validity of a method using an inertial measurement unit for estimating activity-related energy expenditure (AEE) during walking in middle-aged adults. METHODS: Twenty healthy middle-aged participants completed different treadmill walking trials with an inertial measurement unit adhered to their lower back. Gas exchange was monitored with indirect calorimetry. Mechanical data were used to estimate AEE from an algorithm developed by Bouten et al...
December 9, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29222596/the-effects-of-local-forearm-muscle-cooling-on-motor-unit-properties
#6
Matthew M Mallette, Lara A Green, David A Gabriel, Stephen S Cheung
PURPOSE: Muscle cooling impairs maximal force. Using needle electromyography (EMG) to assess motor unit properties during muscle cooling, is limited and equivocal. Therefore, we aimed to determine the impact of local muscle cooling on motor unit firing properties using surface EMG decomposition. METHODS: Twenty participants (12 M, 8 F) completed maximal, evoked, and trapezoidal contractions during thermoneutral and cold muscle conditions. Forearm muscle temperature was manipulated using 10-min neutral (~ 32 °C) or 20-min cold (~ 3 °C) water baths...
December 8, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29218407/short-vs-long-pulses-for-testing-knee-extensor-neuromuscular-properties-does-it-matter
#7
Caroline Giroux, Boris Roduit, Javier Rodriguez-Falces, Jacques Duchateau, Nicola A Maffiuletti, Nicolas Place
PURPOSE: The present study aimed at comparing knee extensor neuromuscular properties determined with transcutaneous electrical stimulation using two pulse durations before and after a standardized fatigue protocol. METHODS: In the first sub-study, 19 healthy participants (ten women and nine men; 28 ± 5 years) took part to two separate testing sessions involving the characterization of voluntary activation (twitch interpolation technique), muscle contractility (evoked forces by single and paired stimuli), and neuromuscular propagation (M-wave amplitude from vastus lateralis and vastus medialis muscles) obtained at supramaximal intensity with a pulse duration of either 0...
December 7, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29218406/correction-to-acute-and-chronic-neuromuscular-adaptations-to-local-vibration-training
#8
Robin Souron, Thibault Besson, Guillaume Y Millet, Thomas Lapole
The author would like to correct the reference in the publication of the original article. The corrected reference is given below for your reading.
December 7, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29214464/reliability-of-a-semi-automated-algorithm-for-the-vastus-lateralis-muscle-architecture-measurement-based-on-ultrasound-images
#9
Robert Marzilger, Kirsten Legerlotz, Chrystalla Panteli, Sebastian Bohm, Adamantios Arampatzis
PURPOSE: The assessment of muscle architecture with B-mode ultrasound is an established method in muscle physiology and mechanics. There are several manual, semi-automated and automated approaches available for muscle architecture analysis from ultrasound images or videos. However, most approaches have limitations such as workload, subjectivity, drift or they are applicable to short muscle fascicles only. Addressing these issues, an algorithm was developed to analyse architectural parameters of the vastus lateralis muscle (VL)...
December 6, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29214463/recreational-football-practice-attenuates-postprandial-lipaemia-in-normal-and-overweight-individuals
#10
Darren J Paul, Jens Bangsbo, George P Nassis
INTRODUCTION: The aim of the present study was to examine the effects of playing football on postprandial lipaemia in normal and overweight individuals. METHODS: Fifteen (7 normal weight, age = 32.3 ± 6.0 years, BMI = 22.8 ± 3.4 kg/m2 and 8 overweight, age = 33.3 ± 5.5 years, BMI = 29.2 ± 3.2 kg/m2, mean ± SD) recreational football players were recruited. On the evening of day 1, participants played a 60-min 9-a-side football match (FOOT) or rested (control; CON) in a randomised counterbalanced cross-over design...
December 6, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29214462/the-use-of-the-cr-10-scale-to-allow-self-regulation-of-isometric-exercise-intensity-in-pre-hypertensive-and-hypertensive-participants
#11
Niamh M Morrin, Mark R Stone, Ian L Swaine, Keiran J Henderson
PURPOSE: Isometric exercise (IE) has been shown to lower blood pressure (BP). Using equipment with force output displays, intensity is usually regulated at 30% maximal voluntary contraction (MVC); however, the cost of programmable equipment and their requirement for maximal contractions presents limitations. A simple, cost-effective alternative deserves investigation. The purpose of this study was (1) to explore the relationship between %MVC, change in systolic BP (ΔSBP), and perceived exertion (CR-10) and (2) to assess the validity of self-regulation of intensity during isometric hand-grip exercise...
December 6, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29214461/co-ingestion-of-protein-or-a-protein-hydrolysate-with-carbohydrate-enhances-anabolic-signaling-but-not-glycogen-resynthesis-following-recovery-from-prolonged-aerobic-exercise-in-trained-cyclists
#12
Karl E Cogan, Mark Evans, Enzo Iuliano, Audrey Melvin, Davide Susta, Karl Neff, Giuseppe De Vito, Brendan Egan
PURPOSE: The effect of carbohydrate (CHO), or CHO supplemented with either sodium caseinate protein (CHO-C) or a sodium caseinate protein hydrolysate (CHO-H) on the recovery of skeletal muscle glycogen and anabolic signaling following prolonged aerobic exercise was determined in trained male cyclists [n = 11, mean ± SEM age 28.8 ± 2.3 years; body mass (BM) 75.0 ± 2.3 kg; VO2peak 61.3 ± 1.6 ml kg-1 min-1]. METHODS: On three separate occasions, participants cycled for 2 h at ~ 70% VO2peak followed by a 4-h recovery period...
December 6, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29214460/blood-flow-restriction-late-in-recovery-after-heavy-resistance-exercise-hampers-muscle-recuperation
#13
Kestutis Bunevicius, Albinas Grunovas, Tomas Venckunas, Kristina Poderiene, Eugenijus Trinkunas, Jonas Poderys
PURPOSE: This study aimed to examine the effect of acute blood flow restriction during the late recovery phase between two resistance exercise bouts on muscular endurance and oxygenation. METHODS: Amateur male middle- and long-distance runners performed two bouts of one-leg dynamic plantar flexion exercise to failure with the load equivalent to 75% of maximum. Subjects were randomly assigned into two experimental groups with thigh occlusion pressure between bouts at either 120 or 200 mmHg with 20 min of passive rest in between, and two control groups without any blood flow restriction separated by either 5 or 20 min of rest...
December 6, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29209783/acute-effect-on-ambulatory-blood-pressure-from-aerobic-exercise-a-randomised-cross-over-study-among-female-cleaners
#14
Charlotte Lund Rasmussen, Line Nielsen, Marie Linander Henriksen, Karen Søgaard, Peter Krustrup, Andreas Holtermann, Mette Korshøj
PURPOSE: High occupational physical activity (OPA) is shown to increase the risk for elevated blood pressure, cardiovascular diseases and mortality. Conversely, aerobic exercise acutely lowers the blood pressure up to 25 h post exercise. However, it is unknown if this beneficial effect also apply for workers exposed to high levels of OPA. Cleaners constitute a relevant occupational group for this investigation because of a high prevalence of OPA and cardiovascular disease. Accordingly, the objective was to investigate the acute effects on ambulatory blood pressure from a single aerobic exercise session among female cleaners...
December 5, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29197931/effects-of-supervised-exercise-training-on-lower-limb-cutaneous-microvascular-reactivity-in-adults-with-venous-ulcers
#15
Garry A Tew, Anil Gumber, Emma McIntosh, Sue Kesterton, Brenda King, Jonathan A Michaels, Markos Klonizakis
PURPOSE: To investigate the effects of a 12-week supervised exercise programme on lower-limb cutaneous microvascular reactivity in adults with venous leg ulceration. METHODS: Thirty-eight adults with unilateral venous ulceration who were being treated with lower-limb compression therapy (58% male; mean age 65 years; median ulcer size 5 cm2) were randomly allocated to exercise or control groups. Exercise participants (n = 18) were invited to attend thrice weekly sessions of lower-limb aerobic and resistance exercise for 12 weeks...
December 2, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29196847/body-position-influences-arterial-occlusion-pressure-implications-for-the-standardization-of-pressure-during-blood-flow-restricted-exercise
#16
Peter Sieljacks, Louise Knudsen, Mathias Wernbom, Kristian Vissing
PURPOSE: Arterial occlusion pressure (AOP) measured in a supine position is often used to set cuff pressures for blood flow restricted exercise (BFRE). However, supine AOP may not reflect seated or standing AOP, thus potentially influencing the degree of occlusion. The primary aim of the study was to investigate the effect of body position on AOP. A secondary aim was to investigate predictors of AOP using wide and narrow cuffs. METHODS: Twenty-four subjects underwent measurements of thigh circumference, skinfold and blood pressure, followed by assessments of thigh AOP in supine and seated positions with a wide and a narrow cuff, respectively, using Doppler ultrasound...
December 1, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29196846/the-availability-of-water-associated-with-glycogen-during-dehydration-a-reservoir-or-raindrop
#17
Roderick F G J King, Ben Jones, John P O'Hara
PURPOSE: This study evaluated whether glycogen-associated water is a protected entity not subject to normal osmotic homeostasis. An investigation into practical and theoretical aspects of the functionality of this water as a determinant of osmolality, dehydration, and glycogen concentration was undertaken. METHODS: In vitro experiments were conducted to determine the intrinsic osmolality of glycogen-potassium phosphate mixtures as would be found intra-cellularly at glycogen concentrations of 2% for muscle and 5 and 10% for liver...
December 1, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29196845/pole-lengths-influence-o2-cost-during-double-poling-in-highly-trained-cross-country-skiers
#18
Camilla Høivik Carlsen, Bjarne Rud, Håvard Myklebust, Thomas Losnegard
PURPOSE: In elite cross-country skiing, double poling is used in different terrain. This study compared O2-cost and kinematics during double poling with four different pole lengths [self-selected (SS), SS - 5 cm, SS + 5 cm, SS + 10 cm] at Low versus Moderate incline. METHODS: Thirteen highly trained male cross-country skiers (mean ± SD 23 ± 3 years; 182 ± 4 cm; 77 ± 6 kg) completed eight submaximal trials with roller skis on a treadmill at two conditions: "Low incline" (1...
December 1, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29192355/venous-occlusion-plethysmography-vs-doppler-ultrasound-in-the-assessment-of-leg-blood-flow-kinetics-during-different-intensities-of-calf-exercise
#19
Elaine Murphy, Joel Rocha, Norita Gildea, Simon Green, Mikel Egaña
PURPOSE: It has recently been shown that venous occlusion plethysmography (VOP) can successfully assess the rate of increase in leg blood flow (LBF) (LBF kinetics) responses during calf exercise, but there is lack of data supporting its validity. METHODS: Using Doppler ultrasound (DU) as a criterion standard technique, we tested the hypothesis that VOP would provide similar estimates of LBF kinetics responses as DU during calf plantar-flexion exercise at a range of different intensities...
November 30, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29188450/ankle-muscle-activity-modulation-during-single-leg-stance-differs-between-children-young-adults-and-seniors
#20
Eduard Kurz, Oliver Faude, Ralf Roth, Lukas Zahner, Lars Donath
PURPOSE: Incomplete maturation and aging-induced declines of the neuromuscular system affect postural control both in children and older adults and lead to high fall rates. Age-specific comparisons of the modulation of ankle muscle activation and behavioral center of pressure (COP) indices during upright stance have been rarely conducted. The objective of the present study was to quantify aging effects on a neuromuscular level. Thus, surface electromyography (SEMG) modulation and co-activity of ankle muscles during single-leg standing was compared in healthy children, young adults and seniors...
November 29, 2017: European Journal of Applied Physiology
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