ABSTRACT

　 The aim of the present study was to determine the effects of different levels of blood flow restriction during aerobic exercise on vascular function of the nonactive limb. Ten males completed 30 minutes of recumbent leg-cycling exercise at 40% of V ･O2max in 3conditions: 1）without blood flow restriction（CON trial）, 2）blood flow restriction at 40% of arterial occlusion pressure（40%trial）, and 3）blood flow restriction at 80% of arterial occlusion pressure （80%trial） . Heart rate and blood pressure were measured continuously throughout the exercise.Brachial artery flow-mediated dilation（FMD）was assessed 10, 30 and 60 minutes post exercise. Blood pressure was significantly higher during exercise in the 80%trial compared to the other conditions. There was no significant difference in post-exercise FMD between the CON and 40%trial （Pre to Post, CON: 5.4 ± 0.4% to 4.2 ± 0.5%, 40%trial: 5.6 ± 0.6% to 4.1 ± 0.3%） . However, post exercise FMD in the 80% trial was significantly reduced（5.4 ± 0.5% to 2.7 ± 0.3%） compared to the other conditions. In conclusion, aerobic exercise with blood floww restriction at 40% of arterial occlusion pressure mitigated reduction in Vascular function of the non-active limb. However, when blood flow restriction is increased to 80％ vascular function is significantly impaired.

DECENTE SPORTS SCIENCE Vol.43/The DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE