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[Purpose] The purpose of this manuscript was to investigate the effect of high and low speed blood flow restriction versus non-blood flow restriction isokinetic exercise on isometric muscle strength, muscle fatigue, and muscle contraction displacement. [Methods] The subjects were consisted of ten males without non-specific muscular skeletal disease. They were classified into four training groups: 1 high speed(300°/s) without blood flow restriction, 2 high speed(300°/s) under blood flow restriction, 3 low speed(90°/s) without blood flow restriction, 4 low speed(90°/s) under blood flow restriction. Before and after the intervention, all of the subjects underwent measurements of isometric quadriceps strength, muscle fatigue, and muscle contraction displacement. [Results] In regard to isometric quadriceps strength before & after intervention, there was no significant difference between groups. For the lactic acid measurement before & after intervention, there was a signigicant difference between groups(p<.05). Also, there was a significant difference between groups(p<.05) in muscle contraction displacement in terms of Dm but there was no significant difference between groups in terms of Tc [Conclusions] Isokinetic exercise with blood flow restriction had effects on lactic acid and muscle contraction displacement.

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The effects of isokinetic exercise with acute blood flow restriction on isometric quadriceps strength, muscle fatigue, and muscle contraction displacement