The Effect of the Load of Fatigue in Lower Limbs from Stepping movements in Step Aerobics

• Main Authors: Hsiao-Mei Lin, 林曉玫
• Other Authors: Li-I Wang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/79756092681782934392

碩士 === 國立東華大學 === 體育與運動科學系 === 99 === Objective: This study compared the different levels of fatigue in lower limbs from the stepping movements in step aerobics in order to be as sports injury preventing information. Methods: The subjects are eight female students of National Dong Hwa University, Parkview Campus, who were not from the physical education department nor athletics-specialized. The data was collected with two sets of synchronized MegaSpeed speed camera (120Hz) and AMTI isometric force plate (1200Hz). Every subject was required to do fatigue tests before and after a 20 cm step aerobics. The stepping movements were repeated for 5 cycles and the data of third cycle was taken to analysis. The analysis of kinematics was collected with Kwon 3D and the data of the isometric force plate was collected with KwonGRF. This study used the repeated measures t-test, and the level of significance is α＝0.05. Results: There is a significant difference in the angle of the knee joint of the right leg at the instant of contacting the plank in the before-fatigue and the after-fatigue tests. Conclusions: In the step aerobics of 20 cm height, it was found that: 1. there is significant cushioning effect only on the right leg when stepping downwards and both left and right legs almost proceed the treading movement directly when stepping on the plank. 2. the only change of the movement before and after the fatigue tests was the decline of the angle of the knee joint of the initiating leg( the right leg). 3. there is no significant increase in the landing burden due to 20 cm step aerobics.