本研究は, ヒト骨格筋の材質特性である"硬さ"が, 『どのような手技』を『どのような強度』で『どれくらいの時間実施する』と最も筋の硬さを変化させ得るか, を明確にすることを目的とした。硬さを低減させる手技の効果を検討すべく, 網羅的な文献渉猟からいくつかの手技で有効な強度と時間を明確化し, 材質を低減させる可能性が最も高いストレッチングとマッサージに焦点をあて実験を行った。その結果, ストレッチングおよびマッサージ法によって, 健常者の安静時の筋は同程度の硬さ低減効果が得られることを明らかにした。ActiveもしくはPassiveによる手技間の差異はあるものの, 現場へ還元し得る直接的な証拠を示した。
This study aimed to clarify the optimal procedure with the greatest effect on "muscle mechanical properties," which are material characteristics of human skeletal muscles. Our study involved investigations from three perspectives : "the type of procedure, type of strength control, and duration of implementation." Based on an exhaustive search of literature, we determined stretching and massage to be the most likely interventional procedures to reduce one of the mechanical properties of the muscles (muscle stiffness). In order to examine the effect of a procedure on the reduction of stiffness, we focused on these two procedures, during the course of our experiment. The results obtained by implementing these interventional procedures revealed that the resting muscle stiffness of healthy subjects is reduced to the same extent. Although there are differences between procedures according to Active or Passive, they showed direct evidence that can be applied to several fields of sports.
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