태권도 고단자 여성의 골밀도와 체력특성

Bone Density and Fitness among High BlackBelt Women in TeaKwonDo

The effect of fighting sport, TeaKwonDo, on bone density is unclear. To determine the TKD-induced influences on local bone density and physical fitness, we evaluated on long-term trained TKD players in 8 women(Carrier mean 7 year) and compared the results with those in 9 sedentary women. Bone densities were measured at lumbar level and proximal femur by DEXA method (Lunar DPX). Bone densities to the neck and greater trochanter in the TKD group were 3.1% and 2.5% higher then those in the normal group. there were no significant difference between two groups. in case of lumber level TKD group was also shown by 6.5% comparing to the normal group. However no significant difference was appeared between two groups, on the other hand, flexibility(sit and reach) and power (standing long jump) among fitness factors were higher in the TKD group, and were significantly recognized at four site in the TKD group were appeared in negative relationship(P＜.O1, over V=.74). There was negative relationship (P＜.O1) between sargent jump and femur neck site in the normal group. In conclusion, we think that bone density at specific site can be increased only when balanced diet and mechanical impact supply enough to cumulate bone mineral content during stimulating local bone site over the minimum effective strain. Because TKD player failed to control frequently their weight, their nutrient rather then mechanical strain may be always deficit to accumulate bone mineral content.