Individual sex-based variability to altitude training in elite badminton players.

To assess how altitude training impacts force-velocity-power (F-V-P) profiling and muscular power and anaerobic capacity in elite badminton players in reference to intra- and inter-individual sex-based variability. Following a quasi-experimental design, 14 players (6 females, 8 males) from the French national badminton singles and doubles teams performed a 3-week 'living high-training high' camp at natural altitude (2320 m). F-V-P profile and Wingate anaerobic test were assessed Pre- and Post-intervention, using ANOVA repeated measures conventional statistics, with further estimation statistics to show the magnitude of the testing condition and visualize intra- and inter-individual responses.

Impact of data averaging strategies on V̇O assessment: Mathematical modeling and reliability.

Background: No consensus exists on how to average data to optimize O assessment. Although the O value is reduced with larger averaging blocks, no mathematical procedure is available to account for the effect of the length of the averaging block on O AIMS: To determine the effect that the number of breaths or seconds included in the averaging block has on the O value and its reproducibility and to develop correction equations to standardize O values obtained with different averaging strategies.

Methods: Eighty-four subjects performed duplicate incremental tests to exhaustion (IE) in the cycle ergometer and/or treadmill using two metabolic carts (Vyntus and Vmax N29).

Relationship between skeletal muscle contractile properties and power production capacity in female Olympic rugby players.

This study aimed to determine which contractile properties measured by tensiomyography (TMG) could better differentiate athletes with high- and low-power values, as well as to analyse the relationship between contractile properties and power production capacity. The contractile properties of the vastus medialis (VM), rectus femoris (RF) and vastus lateralis (VL) of an Olympic women's Rugby Sevens team (n = 14) were analysed before a Wingate test in which their peak power output (PPO) was determined. Athletes were then divided into a high-power (HP) and a low-power (LP) group.

Exercise Preserves Lean Mass and Performance during Severe Energy Deficit: The Role of Exercise Volume and Dietary Protein Content.

The loss of fat-free mass (FFM) caused by very-low-calorie diets (VLCD) can be attenuated by exercise. The aim of this study was to determine the role played by exercise and dietary protein content in preserving the lean mass and performance of exercised and non-exercised muscles, during a short period of extreme energy deficit (~23 MJ deficit/day). Fifteen overweight men underwent three consecutive experimental phases: baseline assessment (PRE), followed by 4 days of caloric restriction and exercise (CRE) and then 3 days on a control diet combined with reduced exercise (CD).

Severe energy deficit upregulates leptin receptors, leptin signaling, and PTP1B in human skeletal muscle.

In obesity, leptin receptors (OBR) and leptin signaling in skeletal muscle are downregulated. To determine whether OBR and leptin signaling are upregulated with a severe energy deficit, 15 overweight men were assessed before the intervention (PRE), after 4 days of caloric restriction (3.2 kcal·kg body wt·day) in combination with prolonged exercise (CRE; 8 h walking + 45 min single-arm cranking/day) to induce an energy deficit of ~5,500 kcal/day, and following 3 days of control diet (isoenergetic) and reduced exercise (CD).