Effects of a soccer season on anthropometric characteristics and physical fitness in elite young soccer players.

International audienceAbstract The aim of this study was to evaluate the effect of a soccer-training season on the anthropometric and performance characteristics of elite youth soccer players. Two groups (age: 14.4 years) participated in this study: (1) 24 soccer players training 8 to 10 hours per week and (2) 26 non-athletic boys used as controls. Anthropometric measurements, aerobic (Yo-Yo Intermittent Recovery test level 1) and anaerobic (counter-movement-jump (CMJ), squat-jump (SqJ), five-jump-test (5JT)and speed (T5m, 10 m, 30 m)) performances were assessed twice during 8 months (T0: October; T1: May) of the competitive season. Data showed significant differences in height and weight at T0 between the two groups (P < 0.05), while no difference in the percentage of body fat (%BF) was observed. However, the soccer players were significantly taller and had lower %BF than age-matched controls at T1. Compared to the controls, the soccer players attained better results in the physical fitness test (P < 0.05) at T0 and T1 except in (T5m) sprinting speed. Hence, significant improvements (P < 0.05) in physical parameters were observed between T0 and T1 only in soccer players. The results demonstrate that soccer-training season was able to provide maturation free improvement in anthropometric and performance characteristics in young soccer players during the training season

Rôle de la combinaison de la restriction calorique et de l'entraînement physique individualisé dans la prise en charge de l'obésité infantile

National audienc

Running interval training and estimated plasma volume variation.

International audienceAbstract The effect of endurance interval training (IT) on haematocrit (Ht), haemoglobin (Hb) and estimated plasma volume variation (PVV) in response to maximal exercise was studied in 15 male subjects (21.1±1.1 years, control group (CG) n=6and training group (TG), n=9). Training group participated in interval training 3-times a week for 7-weeks. A maximal graded test (GXT) was performed to determine maximal aerobic power (MAP) and maximal aerobic speed (MAS) both before and after the training program. To determine Ht and Hb and lactate concentrations, blood was collected at rest, at the end of GXT and after 10- and 30-min of recovery. Maximal aerobic power and maximal aerobic speed increased significantly (p<0.05) after training only in training group. Haematocrit determined at rest was significantly lower in training group than control group after the training period (p<0.05). Interval training induced a significant increase of estimated plasma volume variation at rest for training group (p<0.05) whereas there were no changes for control group. Hence, significant relationships were observed after training between plasma volume variation determined at the end of the maximal test and maximal aerobic speed (r= 0.60, p<0.05) and maximal aerobic power (r= 0.76, p<0.05) only for training group. In conclusion, seven weeks of interval training lead to a significant increase in plasma volume that possibly contributed to the observed increase of aerobic fitness (maximal aerobic power and maximal aerobic speed)

Aptitude anaèrobie et puissance pic chez l'adolescent obèse, en surpoids et non obèse

International audienceno abstrac

Effect of an individualized physical training program on cortisol and growth hormone levels in obese children.

International audienceno abstrac

Effect of Individualized Exercise Training combined with Diet Restriction on Inflammatory Markers and IGF-1/IGFBP-3 in Obese Children

International audienc