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The article reports on research conducted to examine the relationship between the critical velocity (CV) test and maximal oxygen consumption (VO2max) and develop a regression equation to predict VO2max based on the CV test in 35 female collegiate rowers. They found that the positive relationship between CV, anaerobic rowing capacity and VO2max suggests that the CV test may be a practical alternative to measuring the maximal oxygen uptake in the absence of a metabolic cart.

The aim of this study was to evaluate the combined effects of a 10-week exercise program with ingestion of caffeine and epigallocatechin-3-gallate (EGCG) on body composition, cardiovascular fitness, and strength in overweight and obese women. In a double-blind, placebo-controlled approach, overweight and obese women (n = 27) were randomly assigned to treatment groups with exercise (an active-supplementing group with exercise (EX-Act) and a placebo group with exercise (EX-PL)) or without exercise (an active-supplementing group without exercise (NEX-Act) and a placebo group without exercise (NEX-PL)). All participants consumed 1 drink per day for 10 weeks; EX-Act and EX-PL participated in a concurrent endurance and resistance training program. Changes in body composition were assessed using a 4-compartment model. Changes in muscle mass (MM) were evaluated using a DXA-derived appendicular lean-soft tissue equation. There was a significant time × treatment interaction for MM (p = 0.026) and total cholesterol (TC) (p = 0.047), and a significant time × training interaction for peak oxygen consumption (p = 0.046) and upper-body and lower-body strength (p < 0.05). Significant differences between the EX groups and NEX groups for percentage change in MM and peak oxygen consumption, and upper-body and lower-body strength, were revealed. Clinical markers for hepatic and renal function revealed no adverse effects. TC significantly decreased for the active-supplementing groups (EX-Act, NEX-Act). The current study suggests that implementing a caffeine-EGCG-containing drink prior to exercise may improve MM, fitness, and lipid profiles in overweight women. Cette étude se propose d'analyser les effets combinés d'un programme d'exercices de 10 semaines et de la consommation de caféine additionnée d'épigallocatéchine-3-gallate (EGCG) sur la composition corporelle, la condition physique cardiovasculaire et la force chez des femmes présentant un surplus de poids et des femmes obèses. Selon un devis expérimental à double insu, des femmes présentant un surpoids et des femmes obèses (n = 27) sont assignées aléatoirement dans 4 groupes : un groupe avec supplémentation et exercice (EX-Act), un groupe placebo, soit sans supplémentation, mais avec exercice (EX-PL), un groupe avec supplémentation, mais sans exercice (NEX-Act) et un autre groupe placebo, soit sans supplémentation ni exercice (NEX-PL). Toutes les participantes consomment une boisson par jour durant 10 semaines; les groupes EX-Act et EX-PL participent à un programme combiné d'endurance et de force. Les variations de composition corporelle sont évaluées en fonction d'un modèle à quatre compartiments. Les variations de la masse musculaire (MM) sont déterminées au moyen d'une équation déterminant la masse maigre des tissus mous appendiculaires obtenue par DXA. On observe une interaction significative traitement × temps en ce qui concerne la MM (p = 0,026) et la concentration totale de cholestérol (TC) (p = 0,047); on observe aussi une interaction significative traitement × temps en ce qui concerne le consommation d'oxygene de pointe (p = 0,046) et la force du haut et du bas du corps (p < 0,05). En outre, on observe des différences significatives entre les groupes EX et NEX en ce qui concerne les variations en pourcentage de la MM, du le consommation d'oxygene de pointe et de la force du haut et du bas du corps. Les marqueurs cliniques des fonctions hépatique et rénale ne révèlent aucun effet indésirable. La TC diminue significativement dans les groupes recevant des suppléments (EX-Act, NEX-Act). Cette étude indique que boire un breuvage contenant de la caféine et du EGCG avant l'exercice dans un programme d'entraînement physique contribue à l'amélioration de la masse musculaire, de la condition physique et du bilan lipidique chez des femmes présentant un surpoids et des femmes obèses. [ABSTRACT FROM AUTHOR]

The purpose of this study was to examine the reliability of the intermittent critical velocity (ICV) test and assess critical rest interval (CRI) during repeated-sprint exercise. The ICV test is used to examine the linear relationship between total distance and time-to-exhaustion during interval exercise, yielding a repeatable, moderate-intensity parameter (ICV), a high-intensity exhaustive parameter (W'), and CRI. CRI is the theoretical rest period needed to complete a series of repeated bouts of exercise without fatigue. Twenty-four healthy college-aged men (mean ± SD; age 22.7 ± 2.9 years; weight 85.8 ± 15.3 kg; VO(2max) 50.7 ± 8.8 ml/kg/min) and women (mean ± SD; age 21.4 ± 2.3 years; weight 58.9 ± 5.2 kg; VO(2max) 46.4 ± 4.4 ml/kg/min) participants completed two ICV tests (T1 and T2), using 10 s repeated sprints to exhaustion during separate sessions of treadmill running. Linear regression was used to determine ICV and W', while CRI was calculated using the relationship between the number of intervals completed and a variant of ICV. Intraclass correlation coefficients (ICCs) for ICV, W', and CRI were 0.89 (T1 4.42 ± 0.55 m/s; T2 4.34 ± 0.67 m/s), 0.80 (T1 125.6 ± 62.7 m; T2 144.6 ± 65.4 m), and 0.59 (T1 23.9 ± 2.0 s; T2 24.5 ± 2.6 s), respectively. These moderate to high ICC values indicate reliable measurements between ICV trials. Additionally, the evaluation of CRI demonstrated the attainment of a steady-state heart rate (94% of maximum) during a separate session of repeated supramaximal treadmill sprints. The ICV test during treadmill running provides reliable ICV and W' measures, as well as an estimated recovery time via CRI for men and women.