Soccer can be classified as an impact loading sport. Because it characterized by various types of running with rapid changes in direction starts, stops, jumping and kicking, resulting in large ground reaction force (GRF) at the skeleton. The aim of this study was to determine the Effect of playing positions on bone mineral density (BMD), bone mineral content (BMC) among Egyptian professional soccer players. Methods. Data were collected on professional players from three positional Groups (defenders, midfielders, strikers) representing various Egyptian Premier League clubs during the 2011-2012 season. The committee granted ethical approval from the EgyptianFootball Association. 42 players (14 defenders, 16 midfielders, 12 strikers) from three different teams were selected in the study. All subjects were free of any disorders known to affect bone metabolism, such as bone fractures, osteoporosis, diabetes and cardiovascular disease. The participants did not report use of any anti-seizure drugs, alcohol and cortoon consumption, neither smoking cigarette. Regional BMD was measured by a bone densitometer (QDR-1000®, Hologic Inc., and Waltham, Massachusetts, USA) using dual-energy x-ray absorptiometry. The measured regions where lumbar spine (L2, L3, L4) and the femoral regions of the kicking leg, neck (NECK), trochanter (TROCH), ward`s triangle (WARDS). The region "lumbar spine" (L2-L4) is defined by the mean value of L2, L3 and L4; the coefficient of variation was < 1.5%. Results. There was a Significant Difference between Defenders group and the Midfielders group in BMD of Fem Neck for Defenders group. Significant Difference between Defenders group and Strikers group in BMD of Fem Neck for Defenders group. No Significant Difference between Midfielders group and Strikers group in BMD of Fem Neck. Significant Difference between Defenders group and Midfielders group in BMD of Troch for Defenders group.Significant Difference between Defenders group and Strikers group in BMD of Troch for Defenders group. No Significant Difference between Midfielders group and Strikers group in BMD of Troch. No Significant Difference between all groups in BMD of Wards - Tri. Significant Difference between Defenders group and Midfielders group in BMD of L2-L4 for Defenders group.Significant Difference between Defenders group and Strikers group in BMD of L2-L4 for Defenders group. No Significant Difference between Midfielders group and Strikers group in BMD of L2-L4. Significant Difference between Defenders group and Midfielders group at BMC of Fem Neck for Defenders group.Significant Difference between Defenders group and Strikers group at BMC of Fem Neck for Defenders group. No Significant Difference between Midfielders group and Strikers group at BMC of Fem Neck. Significant Difference between Defenders group and Midfielders group at BMC of Troch for Defenders group.Significant Difference between Defenders group and Strikers group at BMC of Troch for Defenders group. No Significant Difference between Midfielders group and Strikers group at BMC of Troch. Significant Difference between Defenders group and Midfielders group at BMC of Wards - Tri for Defenders group.Significant Difference between Defenders group and Strikers group at BMC of Wards - Tri for Defenders group. No Significant Difference between Midfielders group and Strikers group at BMC of Wards - Tri. Significant Difference between Defenders group and Midfielders group at BMC of L2-L4 for Defenders group.Significant Difference between Defenders group and Strikers group at BMC of L2-L4 for Defenders group. No Significant Difference between Midfielders group and Strikers group at BMC of L2-L4. No Significant Difference between Defenders group and Midfielders group in LS. Significant Difference between Defenders group and Strikers group in LS for Defenders group. No Significant Difference between Midfielders group and Strikers group in LS. No Significant Difference between Defenders group and Midfielders group in BS. Significant Difference between Defenders group and Strikers group in BS for Defenders group. No Significant Difference between Midfielders group and Strikers group in BS. Significant Difference between Defenders group and Midfielders group in KD for Defenders group.Significant Difference between Defenders group and Strikers group in KD for Defenders group.Significant Difference between Midfielders group and Strikers group in KD for Midfielders group.The high significant correlation between LS and BMD , BMC for Fem Neck (0.643**) (0.721**) .The high significant correlation between BS and BMD , BMC for L2-L4 (0.523**) (0.649**) .The high significant correlation between KD and BMD , BMC for L2-L4 (0.786**) (0.879**) Conclusions.This analysis has shown that the assessment of bone mineral density , static muscular strength and kicking distance according to field positions among soccer players has very important, and coaches Must be developed and modified their training load according to individual capacity.
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