ラットの組織及び下肢骨格筋重量に対する脱トレーニングの影響

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The effect of long term de-training on the each tissue and skeletal muscle weight was investigated in thefemale Fischer344 rats. The animals were divided into four groups: 23-week-old control (23C), 23-week-oldtrained (23T) , 77-week-old control (77C) and 77-week-old de-trained (77DT). Animals in group 23T and 77DTwere trained with treadmill running （～77%VO2max, 60 min/day and 5 days/wk) for 10 weeks. The de-trainingperiod was 53 weeks.The results showed that the relative heart weight in group 23T was significantly higher than group 23C, 77Cand 77DT. The relative fat pad (inguinal and retroperitoneal) weight in group 23T was significantly lower thangroup 23C. There was no significant difference in the relative liver weight among all groups. The relative hindlimb muscle weight, except lateral gastrocnemius, in group 77-week-old was significantly lower than group 23-week-old. However, The relative lateral gastrocnemius muscle weight in group 77-week-old was significantlyhigher than group 23-week-old. The relative hind limb muscle weight, except extensor digitorum longus andsoleus in group 23T, was significantly higher than group 23C. There was no significant difference between group77C and 77DT in hind limb muscle weight.These results indicate that training effects was lost for a long-term de-training period on each tissue andskeletal muscle weight in rats.
久留米大学健康・スポーツ科学センターの論文