The Effects of Load-bearing on Muscle Activity of the Lower Extremity during Walking

• Main Authors: Chiang,Kun-Ho, 江坤和
• Other Authors: Chen, Ti-Yu
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/f248b9

碩士 === 國立彰化師範大學 === 運動學系 === 107 === The main purpose of this study is to explore the difference in muscular activations of walking with holding different weights in both hands. The study enrolled 15 volunteer healthy young adults（age：22.2 ± 1.8 years old, height：172.7 ± 4.8 cm, weight：73.0 ± 5.6 kg）in this study. Each participant was assigned to walk with holding external load of 5, 10, 15, and 20 kg with a random order and then compare to walk with hands on chest without external load. Both 8 Kistler force platform(9260AA6，1500 Hz) and 4 EMG sensors of Noraxon DTS (Noraxon DTS EMG，1500 Hz) were used to collect dynamics and muscular activations (gluteus maximus muscle, vastus medialis, gastrocnemius muscle, soleus muscle) simultaneously. The results were analyzed by repeated measures one way analysis of variance and Tukey’s post-hoc (α = .05). The results showed that none of different external load changes the stance phase, swing phase and the working time of each step in walking. Moreover, the gait cycle time is longer than no load with 20 kg external load. The vastus medialis and gastrocnemius muscle do not increase the workload of each walk with the external loads. The soleus muscle increases the workload during stance phase due to the excessive external load. Also, the gluteus maximus muscle’s stance phase and the overall workload increases due to the excessive external load. It is shown that soleus and gluteus maximus muscle reinforcement should be included in the training programs for related occupations which require weight-bearing walking.