本研究主要探討高齡者穿著負重健走鞋，在不同負重狀態下，對於步行過程中下肢肌肉活化以及跨越障礙運動學之影響性。方法:本研究招募30名65歲以上高齡者(男性:14名; 女性:16名)，排除行動不便、矯正視力異常以及移動性問題之動作表現評估表(POMA)分數低於25分者(中、高度跌倒風險者)。實驗中參與者隨機穿著未負重與後負重50、100、150、200、250g之健走鞋，分別進行兩部分實驗: (1)行走測試以評估下肢肌電訊號(RMS)之影響，(2)跨越障礙物 (15cm) 之運動學分析，以評估負重鞋應用對於執行高絆倒風險動作時的影響。結果:無論男性、女性高齡者穿著負重健走鞋時，執行跨越障礙運動學上，隨負重(50g~250g)改變並無明顯差異性(p<.05)，而在下肢肌肉徵招效應上，雖負重改變無達顯著影響，但發現穿著負重健走鞋對於步行時下肢肌肉徵招的策略上，受試者間有很大差異性，其中日常唯有步行運動習慣之高齡者，當負重增加時肌肉徵招較為明顯。結論:對於下肢肌力正常之高齡者，如穿著300g~600g之日常用鞋 並不會有無法負荷鞋重之危險性，而若要以鞋負重(50g~250g)增加步行運動之效益，建議下肢功能正常無運動習慣或唯有步行運動習慣者，可能會有較佳使用效果。

The purpose of this study was to investigate the muscle activities of the lower extremity during walking and kinematics during obstacle crossing under wearing varied mass of weighted-shoes in older adults. Methods: Thirty older adults (14 males & 16 females) aged ≥ 65 years were included in this study. Participants were included if they had no mobility problem, abnormal corrective vision, and higher fall risk performance (POMA<25). Participants were asked to wearing weighted-shoes with unloading, 50, 100, 150, 200 and 250g added mass to finish experimental tasks. There were two parts of the experiments in this study. In the first experiment, participants were asked to walking on the treadmill with self-selected gait speed and recorded the lower extremity electromyography by EMG sensor. In the second experiment, a motion capture system was used to simultaneously record kinematics during crossing obstacle at height of 15cm. Result: No matter male or female elder adults, there was no significantly different kinematics during obstacle crossing under wearing varied weighted-shoes (0g~ 250g). In the EMG result showed that there was no significant effect on muscle recruitment by wearing different weighted-mass (0g~250g) shoes. However, it was observed that there was a great difference in muscle activation patterns on wearing varied weighted-mass shoes between participants. It was worthly noted that the elderly whose daily exercise is walking, the effect of muscle recruitment is more obvious when increasing the weighted-mass on shoes. Conclusion: For the elderly with normal lower limb strength, wearing shoes at weight between 300g~600g, there is no danger of being unable to bear the weight of the shoes. For the walking training, the elder who had normal lower limb function with no exercise habit or only daily walking habit may have more training benefit of walking exercise with wearing weighted-shoe (50~250g).

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