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 absorptiometry. The maximal positive mechanical impulse (CJipos) and height jumped (Hj) during countermovement vertical jumps were assessed with a plate force. Additionally, 30-m running speed test (T30), 300-m run test (AC), and 20-m shuttle run test (MAP) were performed. RESULTS: The soccer players attained better results in MAP and AC than the controls (P < 0.05). At the end of the follow-up, the controls increased their percentage of body fat in 11 units (P < 0.05) whereas it remained unchanged in the soccer players. Lean body mass increased with growth but more in the soccer players than in the controls (P < 0.05). The soccer players exhibited greater BMC in the legs and greater BMD in all bone-loaded regions at the end of the study (P < 0.05). During these 3 yr, the soccer players gained twice as much femoral neck and intertrochanteric BMC than the control group (P < 0.05) and increased their femoral neck BMD by 10% and their mean hip BMD by a third more than the control group (both P < 0.05). Multiple regression analysis showed that the improvement in T30 and CJipos has predictive value for the enhancement of bone mass in growing boys. CONCLUSION: Long-term soccer participation, starting at a prepubertal age, results in greater improvement of physical fitness, greater acquisition of bone mass and a lower accumulation of body fat.
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 absorptiometry. The maximal positive mechanical impulse (CJipos) and height jumped (Hj) during countermovement vertical jumps were assessed with a plate force. Additionally, 30-m running speed test (T30), 300-m run test (AC), and 20-m shuttle run test (MAP) were performed. RESULTS: The soccer players attained better results in MAP and AC than the controls (P < 0.05). At the end of the follow-up, the controls increased their percentage of body fat in 11 units (P < 0.05) whereas it remained unchanged in the soccer players. Lean body mass increased with growth but more in the soccer players than in the controls (P < 0.05). The soccer players exhibited greater BMC in the legs and greater BMD in all bone-loaded regions at the end of the study (P < 0.05). During these 3 yr, the soccer players gained twice as much femoral neck and intertrochanteric BMC than the control group (P < 0.05) and increased their femoral neck BMD by 10% and their mean hip BMD by a third more than the control group (both P < 0.05). Multiple regression analysis showed that the improvement in T30 and CJipos has predictive value for the enhancement of bone mass in growing boys. CONCLUSION: Long-term soccer participation, starting at a prepubertal age, results in greater improvement of physical fitness, greater acquisition of bone mass and a lower accumulation of body fat.
Authors: Joaquin Sanchis-Moysi; Cecilia Dorado; Hugo Olmedillas; Jose A Serrano-Sanchez; Jose A L Calbet Journal: Eur J Appl Physiol Date: 2010-04-17 Impact factor: 3.078
Authors: Diego Moliner-Urdiales; Francisco B Ortega; Germán Vicente-Rodriguez; Juan P Rey-Lopez; Luis Gracia-Marco; Kurt Widhalm; Michael Sjöström; Luis A Moreno; Manuel J Castillo; Jonatan R Ruiz Journal: Eur J Appl Physiol Date: 2010-04-07 Impact factor: 3.078
Authors: Germán Vicente-Rodríguez; Alejandro Urzanqui; Maria Isabel Mesana; Francisco B Ortega; Jonatan R Ruiz; Juan Ezquerra; José A Casajús; Gloria Blay; Vicente A Blay; Marcela Gonzalez-Gross; Luis A Moreno Journal: J Bone Miner Metab Date: 2008-05-11 Impact factor: 2.626
Authors: L Gracia-Marco; G Vicente-Rodríguez; J A Casajús; D Molnar; M J Castillo; L A Moreno Journal: Eur J Appl Physiol Date: 2011-03-11 Impact factor: 3.078