Baroreflex dynamics during the rest to exercise transient in acute normobaric hypoxia in humans
ConclusionThe immediate BRS decrease in H, coupled with similar rapid HR and CO responses, is compatible with a withdrawal of residual vagal activity in H associated with increased sympathetic drive. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - April 24, 2024 Category: Physiology Source Type: research

Strength and power adaptations of the upper body following 20 training sessions on an eccentric arm-crank ergometer
ConclusionsTwenty progressive training sessions on a symmetric arm-crank ergometer are effective in inducing significant aerobic and anaerobic performance and strength improvements in the upper body. This intervention is safe and feasible, and can be performed at relatively low cardiovascular intensities. Therefore, this training method offers an interesting approach from elite sports to rehabilitation. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - April 24, 2024 Category: Physiology Source Type: research

Optimization of post-activation potentiation in girls and women
ConclusionAfter both a 5 and 10  s CC, women have greater PAP compared with girls. The optimal CC duration for the knee extensors in women appears to be ~ 5-10 s, while CC durations between 5 and 30 s do not appear to affect levels of PAP in girls. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - April 23, 2024 Category: Physiology Source Type: research

Resistance training-induced changes in muscle proteolysis and extracellular matrix remodeling biomarkers in the untrained and trained states
ConclusionOur results are the first to show that RT does not attenuate the acute-induced response of proteolysis and ECM remodeling-related biomarkers. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - April 23, 2024 Category: Physiology Source Type: research

Structure and function of Achilles and patellar tendons following moderate slow resistance training in young and old men
AbstractThe aim of this study was to investigate the effect of aging and resistance training with a moderate load on the size and mechanical properties of the patellar (PT) and Achilles tendon (AT) and their associated aponeuroses; medial gastrocnemius (MG) and vastus lateralis (VL). Young (Y55; 24.8  ± 3.8 yrs,n = 11) and old men (O55; 70.0 ± 4.6 yrs,n = 13) were assigned to undergo a training program (12 weeks; 3 times/week) of moderate slow resistance training [55% of one repetition maximum (RM)] of the triceps surae and quadriceps muscles. Tendon dimensions were assessed using 1.5 T magnetic reson...
Source: European Journal of Applied Physiology - April 22, 2024 Category: Physiology Source Type: research

Lack of cardiac remodelling in elite endurance athletes: an unexpected and not so rare finding
ConclusionOur study demonstrates a relatively high prevalence of NG in endurance athletes, in addition to the expected EH. Athletes with NG perform worse in exercise-stress test and exhibit some less advantageous functional heart characteristics. However, the type of heart geometry is not associated with negative clinical findings. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - April 22, 2024 Category: Physiology Source Type: research

Targeted effect of ischemic preconditioning on the gas exchange threshold in healthy males and females
AbstractIschemic preconditioning (IPC) appears to improve exercise performance although there is uncertainty about the intensity dependence of this effect. The present study sought to clarify effects of IPC on physiological responses at and below peak oxygen uptake, including the gas exchange threshold (GET). Ten male and female participants completed five cycling ramp tests (10 W/min) to failure, with the final two tests preceded by either IPC (4  × 5 min 220 mmHg bilateral leg occlusions) or SHAM (20 mmHg), in a randomised crossover design. The rates of O2 uptake (\(\dot{V}\)O2), carbon dioxide output (\(\dot{V}\...
Source: European Journal of Applied Physiology - April 20, 2024 Category: Physiology Source Type: research

Effects of different exercise intensities or durations on salivary IgA secretion
ConclusionOur findings suggest that a reduction in s-IgA secretion is induced by exercise intensity of greater than or equal to 75%\({\dot{\text{V}}}\)O2max for 30  min or exercise duration of greater than or equal to 90 min at 55%\({\dot{\text{V}}}\)O2max in healthy untrained young men. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - April 18, 2024 Category: Physiology Source Type: research

Motor unit firing rates increase in prepubescent youth following linear periodization resistance exercise training
ConclusionsMU adaptations contribute to strength increases following RET in prepubescent youth. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - April 18, 2024 Category: Physiology Source Type: research

Association of the rate of torque development and joint angle with passive muscle stiffness
ConclusionsA greater relative RTD occurs at plantarflexed angles (i.e., the ascending limb of the force –length curve) in the triceps surae, and relative RTD is strongly related to passive MG stiffness at dorsiflexed angles (i.e., longer muscle lengths). (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - April 17, 2024 Category: Physiology Source Type: research

Can neuromuscular differences manifest by early adolescence in males between predominantly endurance and strength sports?
ConclusionThe wrestlers were stronger than triathletes and controls, potentially as a result of muscle architectural differences and a greater neural activation. Neuromuscular differences can already be detected by early adolescence in males between predominantly endurance and strength sports, which may result from selection bias and/or physical training. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - April 17, 2024 Category: Physiology Source Type: research

Stability of transonic shocks to the Euler-Poisson system with varying background charges
AbstractThis paper is devoted to studying the stability of transonic shock solutions to the Euler-Poisson system in a one-dimensional nozzle of finite length. The background charge in the Poisson equation is a piecewise constant function. The structural stability of the steady transonic shock solution is obtained by the monotonicity argument. Furthermore, this transonic shock is proved to be dynamically and exponentially stable with respect to small perturbations of the initial data. One of the crucial ingredients of the analysis is to establish the global well-posedness of a free boundary problem for a quasilinear second ...
Source: European Journal of Applied Physiology - April 16, 2024 Category: Physiology Source Type: research

On monotone traveling waves for Nicholson ’s blowflies equation with degenerate P-Laplacian diffusion
AbstractWe study the existence and stability of monotone traveling wave solutions of Nicholson ’s blowflies equation with degeneratep-Laplacian diffusion. We prove the existence and nonexistence of non-decreasing smooth traveling wave solutions by phase plane analysis methods. Moreover, we show the existence and regularity of an original solution via a compactness analysis. Finally, we prove the stability and exponential convergence rate of traveling waves by an approximated weighted energy method. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - April 16, 2024 Category: Physiology Source Type: research

A refinement of the Schwarz-Pick estimates and the Carath éodory metric in several complex variables
AbstractIn this article, we first establish an asymptotically sharp result on the higher order Fr échet derivatives for bounded holomorphic mappings\(f(x) = f(0) + \sum\limits_{s = 1}^\infty {{{{D^{sk}}f(0)({x^{sk}})} \over {(sk)!}}} :\,{B_X} \to {B_Y}\), whereBX is the unit ball ofX. We next give a sharp result on the first order Fr échet derivative for bounded holomorphic mappings\(f(x) = f(0) + \sum\limits_{s = k}^\infty {{{{D^s}f(0)({x^s})} \over {s!}}} :\,{B_X} \to {B_Y}\), whereBX is the unit ball ofX. The results that we derive include some results in several complex variables, and extend the classical result in o...
Source: European Journal of Applied Physiology - April 16, 2024 Category: Physiology Source Type: research

Weak-strong uniqueness for three dimensional incompressible active liquid crystals
AbstractThe hydrodynamics of active liquid crystal models has attracted much attention in recent years due to many applications of these models. In this paper, we study the weak-strong uniqueness for the Leray-Hopf type weak solutions to the incompressible active liquid crystals in ℝ3. Our results yield that if there exists a strong solution, then it is unique among the Leray-Hopf type weak solutions associated with the same initial data. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - April 16, 2024 Category: Physiology Source Type: research