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KMID : 0359420050230030263
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Korean Journal of Sports Medicine
2005 Volume.23 No. 3 p.263 ~ p.269
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The Effects of Cryotherapy on Recovery Processes in Damaged Skeletal Muscle
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Lee Ho-Seong
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Abstract
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The purpose of this study was to examine effects of cryotherapy on recovery processes in damaged skeletal muscle. Female wistar rats (N=20, 180-200g) were randomly assigned to cryotherapy group (cryo-G, 5℃) and non-cryotherapy group (non-cryo-G). Muscle damage was induced by intramuscular(both gastrocnemius muscle)injection of bupivacaine (0.6ml). Immediately after muscle damage, the gastrocnemius muscle was either treated continuously with a icing system 2000 (5℃) for 20minutes 2 times at 20 minutes intervals and received non-cryotherapy treatment. damage and regeneration myofiber cross section, damage and regeneration cross section were measured from dyed preparation after 6 hours, 5, 7, and 14 days. Blood cells number (erthrocyte and neutrophil), interstitial ratio, and collagen fiber were respectively measured after from dyed preparation after 6 hours and 14 days. Erthrocyte, neutrophil, and interstitial ratio were significantly lower at cryo-G compared to at non-cryo-G. At cryo-G, damage myofiber cross section and damage cross section were lower than that at non-cryo-G, but regeneration myofiber cross section and regeneration cross section were not significantly different at time course between groups. The collagen fiber ratio was not significantly different between groups. The results of this study may suggest that damaged tissue cryotherapy has no changes in muscle regeneration, but positive effects on inhibiting damage exacerbation in the acute phase.
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KEYWORD
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Cryotherapy, Recovery processes, Skeletal muscle damage
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