下楼梯、走步以及跑步是日常生活中的常见动作，但对于功能衰退的老年人却容导致跌倒或受伤，且人体为了应对各种情况以避免摔倒，最先启动的运动神经保护机制是下肢刚度（Lower extremity stiffness）的调节。基于此，本研究以中国知网、万方、Google scholar、Web of science等数据库，主题为老年人、下肢刚度等关键词检索并收集相关研究成果，总结出不同动作任务中下肢刚度变化的异同点，同时研究结果表明对可控因素进行干预能够改善下肢刚度的变化从而预防老年人跌倒，但由于相关研究较少，未来仍需要深入探究运动干预对老年人下肢刚度的影响，以得到更加可靠的规律性特征和依据。
Walking down stairs, walking and running are common actions in daily life, but in elderly people with reduced functional capacity, they may lead to falls or injuries. The first motor neuroprotective mechanism that the body activates in order to cope with various situations to avoid falls is the regulation of lower extremity stiffness. Based on this, this study retrieved and collected relevant research results from databases such as China Knowledge, Wanfang, Google scholar and Web of science, with keywords such as elderly and lower extremity stiffness, and summarised the similarities and differences in the changes of lower extremity stiffness in different movement tasks. However, due to the small number of related studies, there is still a need to investigate the effects of movement interventions on the lower limb stiffness of the elderly in order to obtain more reliable regular characteristics and basis.