Effects of CrossFit Training on Physical Fitness, Blood Lipids, and Bone Metabolism Index of Prepubescent Girls

Abstract

PURPOSE The purpose of this study was to investigate the effects of crossFit training on physical fitness, blood lipids and bone metabolism index of prepubescent girls. METHODS Eighteen elementary school girls were assigned to either crossFit training group (CTG: n=9, Height: 148.08±5.80 cm, Weight: 58.26±3.29 kg, Age: 11.44±0.73 year) or control group (CON: n=9, Height: 147.49±5.41 cm, Weight: 56.83±3.72 kg, Age: 11.22±0.83 year). crossFit training program consisted of workout of the day (WOD) with 3-4 items for 10 weeks (3 day per week). RESULTS The results were as follows: 1) The hand grip, back strength, sit-up, sargent jump, eyes-closed one-leg standing and trunk flexion were increased significantly in the CTG. 2) The TC, TG, LDL-C were decreased significantly, and the HDL-C was increased significantly in the CTG. 3) The osteocalcin was increased significantly in the CTG, but there were no significant difference in the alkaline phosphatase and calcitonin. CONCLUSIONS CrossFit training was effective for physical fitness and blood lipids but there was no significant difference in bone metabolism index. Long-term exercise may be effective for positive changes in bone metabolism index and further study on crossFit training consisting of different exercise intensity, period, and frequency should be performed on prepubescent girls.

Keywords

• crossfit training
• physical fitness
• blood lipids
• bone metabolism index
• prepubescent girls