Effects of warm-up on knee proprioception

• Main Authors: Sih Huei Lin, 林思慧
• Other Authors: Y. J. Chang
• Format: Others
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/76479345102239146209

碩士 === 長庚大學 === 物理治療學系 === 100 === 【Background and purposes】Proprioception is the sensation originating from the mechanoreceptors around joint, skin, and muscle. The functions of proprioception are important, since it provides the awareness of position and movements of joints in space. Many factors affect proprioception. Aging, fatigue, injury, disease, and cryotherapy deteriorate proprioception; while warm-up, training, repeated passive motion enhance it. Previous studies on active warm-up revealed its effect of improving proprioception, likely via ways including elevation of tissue temperature and repeated mechanical stimulations. Studies also revealed the suppressing effects of cryotherapy on proprioception, however, limited information is available for the effects and mechanisms of tissue temperature elevation on proprioception. This study thus aimed to verify the effects of warm-up and passive repetitive motions effectors, and underlying mechanisms of temperature factor, by comparing the effects of physical activity, heating and repeated passive motion effect of proprioception, to further understand the underlying mechanisms. 【Method】We employed a cross-sectional and repetitive measurements design. Twenty healthy subjects participated in the experiment. Treatments were randomly applied in three successive days. Proprioception was tested before and immediately following the three treatments.【Result】After the warm-up intervention, no significant effect on knee proprioception was found. After the physical activity, kinesthesia error increased on knee flexion 70°(from 2.42 ± 1.48° to 3.68 ± 1.86°). After the heating, joint position sense error increased on knee flexion 70° (from 1.15 ±1.3° to 1.56 ± 1.43°). After the passive repetitive motions, no significant effect on knee proprioception was found.【Conclusion】No significant effect of warm-up on knee proprioception was found.【Clinical Relevance】This study provides insights the understanding of how knee proprioception changes following active warm-up, short-wave, and repeated passive motions, as well as the related mechanisms.