Abstract
We measured isometric trunk extension toruque values (TV) in 29 normal subjects (22 males, 7 females) with Lumbar Extension Machine (LEM). The effects of sex differences and lumbar extension angle(LFA), and serial changes after 6 weeks' exercise of trunk extensor on trunk extension strength were investigated.
1) It was shown that the TV was more larger on male group than female one, and that the larger LFA was, larger TV was 2) TV was significantly incresed after the exercises, same as 1). However, there were many individual differences on a increasing rate of TV, and it was difficult to find a clear relationship between TV and LFA.
3)The significantly decrease on all LFAwas manifested on retesting six months later.
