Effect of Incremental Exercise on the of Maximum Force of Femur and Lumbar Vertebrae in SD Rats
- VernacularTitle:递增负荷运动对SD大鼠股骨和腰椎最大载荷的影响
- Author:
Yanyan DU
;
Lu ZHENG
;
Chao WANG
- Publication Type:Journal Article
- Keywords:
incremental exercise;
three-point bending test;
compressive test;
maximum force
- From:Chinese Journal of Sports Medicine
2010;(1):46-50
- CountryChina
- Language:Chinese
-
Abstract:
Objective The aim of the study is to investigate whether the progressive incremental exercise can induce the change in bone maximum force.Methods One hundred and seventy healthy SD rats,aged 3 months,were used as samples after adaptive exercise for one week,and then they were divided to a basic control group(C_0),8 control groups and 8 exercise groups according to the training duration(2W,4W,6W,8W,9W,11W,13W and 15W).Based on Bedford and our pre-study.the longest training duration of the rats was 15 weeks.The maximum force(F) of femoral bone and the 2nd lumbar vertebrae(L_2)were tested by three-point bending test and compressive test separately.Results It was shown that there was no pronounced difference in F of femoral bone between con trol groups and exercise groups.But significant differences in F of L_2 were found between the control groups and exercise groups(P<0.001).Conclusions Changes in different degree were found in the F of femoral bone and L_2 during the process of growth.The differential effects of incremental exercise on F were caused by the difference in training intensities and in the bone types.
