Objectives: To research the efficacy of exercise therapy, alternate ice and hot therapy and low power laser therapy on chronic lumbar muscle strain.
试验目的：探明运动疗法、冷热交替疗法和低强度激光照射疗法对腰肌劳损的疗效。
Objectives: To research the efficacy of exercise therapy, alternate ice and hot therapy and low power laser therapy on chronic lumbar muscle strain.
试验目的：探明运动疗法、冷热交替疗法和低强度激光照射疗法对腰肌劳损的疗效。
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