| Summary: | 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.
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