Relationship between Back and Leg Isokinetic Strength with Maximum Acceptable Weight of Lift in Thai Males; Psychophysical Method

Abstract

The aim of this study was to determine the relationship between isokinetic strength of back and leg muscle with maximum acceptable weight of lift (MAWOL) and comparison between strength of back stronger than leg (BSTL) group and leg stronger than back (LSTB) group in thirty-fve healthy Thai males age range between 18-30 years. Method : Isokinetic strength of back and leg muscle were determined by BIODEX® isokinetic dynamometer. MAWOL were determined by Psychophysical method. Results : There was correlation between isokinetic back and leg strength (r = 0.486, p < 0.05) but no correlation between isokinetic back or leg muscle strength and MAWOL (p > 0.05). Conclusion : Individuals with high back strength tended to have high strength of leg muscle. Individual with high back and leg strength do not necessarily lift heavy load when the maximum load was determined by psychophysical method. Others factors may affect maximum acceptable weight than back and leg strength