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OBJECTIVE To study the effect of physical activity on whole body fat (BF), its regional deposition and the influence of body fatness on physical performance in prepubertal children. DESIGN Cross-sectional study. SUBJECTS A total of 114 boys (9.4+/-1.5 y, Tanner I-II), randomly sampled from the population of Gran Canaria (Spain), 63 of them physically(More)
AIM/HYPOTHESIS The aim of this study was to investigate mitochondrial function, fibre-type distribution and substrate oxidation during exercise in arm and leg muscles in male postobese (PO), obese (O) and age- and body mass index (BMI)-matched control (C) subjects. The hypothesis of the study was that fat oxidation during exercise might be differentially(More)
PURPOSE To determine the effect of physical activity on bone mineral accrual during growth in prepuberal boys. METHODS Seventeen soccer players and 11 matched (physically active) control boys (Tanner 1-2, at the start of the study) were followed over a 3-yr period. Bone mineral content (BMC) and a real density (BMD) was measured by dual-energy x-ray(More)
It is widely recognized that the risk of fractures is closely related to the typical decline in bone mass during the ageing process in both women and men. Exercise has been reported as one of the best non-pharmacological ways to improve bone mass throughout life. However, not all exercise regimens have the same positive effects on bone mass, and the studies(More)
PURPOSE There is evidence to suggest a beneficial effect of physical activity on several mental disorders. METHODS The study aim was to assess the association between low physical activity during leisure time (or sedentary lifestyles) and the incidence of mental disorders in 10,381 participants, from a Spanish dynamic prospective cohort of university(More)
Not much is known about the osteogenic effects of sport activities before puberty. We tested the hypothesis that football (soccer) participation is associated with enhanced bone mineral content (BMC) and areal density (BMD) in prepubertal boys. One hundred four healthy white boys (9.3 +/- 0.2 years, Tanner stages I-II) participated in this study: 53(More)
OBJECTIVE The main purpose of this study was to determine the relationship between physical activity (PA) levels and adiposity. The secondary purpose was to assess the effect of physical fitness and living area on adiposity. RESEARCH METHODS AND PROCEDURES A cross-sectional study was carried out in a regional representative sample of 1068 children 7 to 12(More)
Mitochondrial background has been demonstrated to influence maximal oxygen uptake (VO(2max), in mLkg(-1)min(-1)), but this genetic influence can be compensated for by regular exercise. A positive correlation among electron transport chain (ETC) coupling, ATP and reactive oxygen species (ROS) production has been established, and mitochondrial variants have(More)
OBJECTIVE To analyse the effect of extracurricular physical activities on fat mass accumulation and physical fitness during growth in early pubertal males. DESIGN Longitudinal study. SUBJECTS A total of 42 male children (9.4+/-1.4 years, Tanner I-II and 12.7+/-1.5 years, Tanner III-IV, before and after the 3.3 years follow-up, respectively), randomly(More)
The effects of a training program consisting of weight lifting combined with plyometric exercises on kicking performance, myosin heavy-chain composition (vastus lateralis), physical fitness, and body composition (using dual-energy X-ray absorptiometry (DXA)) was examined in 37 male physical education students divided randomly into a training group (TG: 16(More)