Aims: The present study aimed to assess the ability of bioelectrical impedance vector analysis (BIVA) in discriminating fitness levels futsal players, exploring association body composition and parameters with aerobic power. Methods: Forty-eight professional players (age 23.8 ± 5.3 years) were involved a cross-sectional during their pre-season phase. Fat mass (FM) muscle determined by dual-energy X-ray absorptiometry. VO2max was obtained indirect calorimetry through graded exercise test...

Blood flow restrictive (BFR) exercise elicits a localized hypoxic environment compatible with greater metabolic stress. We intended to compare the acute changes in muscle microvascular oxygenation following low-intensity knee extension exercise, combined different levels of BFR. Thirteen active young men (age: 23.8 ± 5.4 years) were tested for unilateral (30+15+15+15 reps at 20% one repetition maximum) on 4 conditions: no-BFR (NOBFR), 40, 60 and 80% arterial occlusion pressure (AOP)....

An increasing body of evidence indicates that the phase angle (PhA) can be applied as a marker nutritional status, disease prognosis, and mortality probability. Still, it is not known whether PhA used an indicator muscular quantity strength maximal aerobic capacity in overweight/obese former highly active individuals, understudied population. This study aimed to analyze association between with skeletal muscle mass, isometric strength, through VO2max, inactive athletes.Cross-sectional...

Objectives Biceps femoris long‐head architectural assessment using ultrasonography (US) has not been previously described in detail for both acquisition (image capture) and digitization measurement) processes, the effect of US window width is unknown. This study aimed to describe reliability test‐retest minimum detectable difference US‐based biceps measurements. Methods Muscle length was determined by marking muscle‐tendon junction distances. Sonograms were acquired with a 6‐cm image cropped...

Leucine metabolites, α-hydroxyisocaproic acid (α-HICA) and β-hydroxy-β-methylbutyrate (calcium, HMB-Ca free acid, HMB-FA), have been proposed to augment resistance training-induced changes in body composition performance.We aimed conduct a double-blind randomized controlled pragmatic trial evaluate the effects of off-the-shelf leucine metabolite supplements α-HICA, HMB-FA, on muscle thickness performance.Forty men were randomly assigned receive α-HICA (n = 10, fat-free mass [FFM] 62.0 ± 7.1...

The effects of dietary protein on body composition and physical performance seemingly depend the essential amino acid profile given source, although controversy exists about whether animal sources may possess additional anabolic properties to plant-based sources.To compare a novel matrix whey supplementation composition, strength, power, endurance trained futsal players.Fifty male players were followed during 8 weeks supplementation, with 40 completing study either (N = 20) or 20). following...

Background General expectations speculated that there are differences between drop jump (DJ) and horizontal (HDJ) exercises. While these criteria may be valid, we have yet to find a report explores in competitive level athletes. Objective The study aimed compare spatiotemporal variables the vs . elite jumpers sprinters. Methods Sixteen international-level male athletes performed two DJ attempts at different fall heights 0.3, 0.4, 0.5 m (DJ30, DJ40, DJ50), after 2 h, they HDJ (HDJ30, HDJ40,...

Abstract Fatela, P, Reis, JF, Mendonca, GV, Freitas, T, Valamatos, MJ, Avela, J, and Mil-Homens, P. Acute neuromuscular adaptations in response to low-intensity blood flow restricted exercise high-intensity resistance exercise: are there any differences? J Strength Cond Res 32(4): 902–910, 2018—Numerous studies have reported similar between (LI) blood-flow (BFRE) (HI) training. Unfortunately, none of these experimental designs individualized restriction (BFR) levels each participant. Thus,...

Static stretching with rest between repetitions is often performed to acutely increase joint flexibility. Purpose: To test the effects of lack resting and minimal number required change maximal range motion (ROM), tolerated passive torque (MPT), submaximal at a given angle (PT). Methods: Five static 30-s rest-interval (RI) no-rest-interval (NRI) protocol were compared. Participants (N = 47) encouraged perform ROM without pain in all repetitions. Each repetition lasted 90 s. Maximal ROM, MPT,...

This study investigated the acute effect of a low-volume static and dynamic stretching on maximal isometric peak force (MIPF), time to (TMIF), rate production (RFP) average amplitude surface EMG (AvgEMG) main agonist muscles acting bench press maximum exercise. Thirty subjects were randomly divided into three groups: stretch (SG: 22.8 ± 5.6 years, 176.6 3.5 cm, 74.4 5.9 kg), (DG: 21.4 3.9 178.4 7.2 71.7 8.2 kg) control group (CG: 20.4 3.6 179.8 5.8 9.8 kg). SG performed two 30-s repetitions...

Muscle coordination in human movement has been assessed through muscle synergy analysis. In sports science, this procedure mainly applied to the comparison between highly trained and unexperienced participants. However, lack of knowledge regarding strength training exercises led us study differences neural strategies perform power clean weightlifters untrained individuals. Synergies were extracted from electromyograms 16 muscles ten participants seven weightlifters. To evaluate differences,...

Abstract Hamstring strain injuries (HSI) are the most common injury in male professional football and potentially a primary risk factor to re‐injury. Although isokinetic strength ratios have often been used identify imbalances that can augment of players, rate torque development hamstring quadriceps ratio (RTD H/Q) has rarely considered previous reports. Furthermore, little consideration given selective lengths (30° knee flexion) its influence on production. The aim this study was...

Ultrasound imaging allows the evaluation of musculoskeletal morphology and function. elastography can also offer semi-quantitative and/or quantitative assessment tissue stiffness providing relevant information about adaptations skeletal muscle mechanical properties. In this study we aimed to explore feasibility ultrasound in assessing effect strength training on vastus lateralis stiffness. Twenty-eight young male adults were separated a control (n = 9) strength-training 20) groups. The group...

This study aimed to compare muscle strength and power indicators according bioimpedance spectroscopy’s phase angle (PhA) values, in resistance-trained (RT) men, while exploring associations between PhA performance. Forty-four men aged 18−45 years, engaged RT, were allocated tertiles. Lean soft tissue (LST) fat mass (%FM) assessed using dual-energy x-ray absorptiometry; dynamic 1 repetition maximum (1RM) of bench press (BP) back squat (BS) Wingate test (WT) countermovement jump (CMJ). For WT...

Previous research addressed the spatiotemporal variables of drop jump (DJ) versus horizontal (HDJ). This study compared kinetic DJ HDJ in elite jumpers and sprinters. In a single session, sixteen sprinters performed two attempts with three different fall heights (0.30 m, 0.40 0.50 m), after 2 h, from same m). Kinetic variables: eccentric ground reaction forces (GRFE) concentric forces; impulse (PE) (PC); peak power phase; rate force decrease (RFDe) were measured using research-grade plate....

β-hydroxy-β-methylbutyrate (calcium: HMB-Ca and free acid: HMB-FA) α-hydroxyisocaproic acid (α-HICA) are leucine metabolites that have been proposed to improve body composition strength when combined with resistance exercise training (RET). In this double-blind randomized controlled pragmatic trial, we evaluated the effects of off-the-shelf supplements: α-HICA, HMB-FA HMB-Ca, on RET-induced changes in performance. Forty men were blocked receive α-HICA (n = 10, fat-free mass [FFM] 62.0 ± 7.1...

Previous studies have used isokinetic dynamometry to assess joint torques and angles during passive extension of the knee, often without reporting upon methodological errors reliability outcomes. In addition, techniques measure knee torque-angle extent which may be affected by position subjects is also unclear. Therefore, we conducted an analysis intra- inter-session two methods assessing extension: (A) a 2D kinematic coupled custom-made device that enabled direct measurement resistance...

We aimed to assess the effects of off-the-shelf leucine metabolite supplements on phase angle (PhA), bioimpedance vector analysis (BIVA) patterns and strength during an 8-week resistance training protocol. Fifty-three male participants were allocated into 4 groups: α-hydroxyisocaproic acid (n = 12, age 30.9 ± 9.3 years), β-hydroxy-β-methylbutyrate free 31.0 calcium 15, 32.1 5.2 years) or placebo 14, 28.9 6.6 years). Bioimpedance parameters 1-repetition maximum (1RM) for back squat bench...