Walking is a popular form of exercise and is associated with many health benefits; however, frontal-plane knee joint loading brought about by a large internal knee-abduction moment and cyclic loading could lead to cartilage degeneration over time. Therefore, knee joint mechanics during an alternative walking exercise needs to be analyzed. The purpose of this study was to examine the lower-extremity joint mechanics in the frontal and sagittal planes during incline walking. Fifteen healthy males walked on a treadmill at five gradients (0%, 5%, 10%, 15%, and 20%) at 1.34. m/s, and lower-extremity joint mechanics in the frontal and sagittal planes were quantified. The peak internal knee-abduction moment significantly decreased from the level walking condition at all gradients except 5%. Also, a negative relationship between the internal knee-abduction moment and the treadmill gradient was found to exist in 10% increments (0-10%, 5-15%, and 10-20%). The decrease in the internal knee-abduction moment during incline walking could have positive effects on knee joint health such as potentially reducing cartilage degeneration of the knee joint, reducing pain, and decreasing the rate of development of medial tibiofemoral osteoarthritis. This would be beneficial for a knee surgery patient, obese persons, and older adults who are using incline walking for rehabilitation and exercise protocols. Findings from the current study can provide guidance for the development of rehabilitation and exercise prescriptions incorporating incline walking.
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机译：步行是一种流行的运动方式，并具有许多健康益处;但是，由较大的内部膝关节外展力矩和周期性载荷引起的额面膝关节载荷可能会导致软骨随着时间的推移而退化。因此，需要分析替代步行锻炼过程中的膝关节力学。这项研究的目的是检查在倾斜行走过程中额叶和矢状面的下肢关节力学。 15名健康男性以1.34的五个梯度（0％，5％，10％，15％和20％）在跑步机上行走。 m / s，并量化额叶和矢状面的下肢关节力学。在5％的所有梯度下，峰值内膝外展力矩均比水平行走条件明显降低。另外，发现内部膝关节外展力矩与跑步机坡度之间呈负相关，且以10％的增量（0-10％，5-15％和10-20％）存在。倾斜步行过程中内部膝关节外展力矩的减少可能会对膝关节健康产生积极影响，例如潜在地减少膝关节的软骨变性，减轻疼痛并降低内侧胫股骨关节炎的发生率。这对于使用倾斜行走进行康复和锻炼方案的膝盖手术患者，肥胖者和老年人将是有益的。本研究的发现可为结合倾斜行走的康复和运动处方的开发提供指导。
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