title: Effect of resistance exercise training combined with relatively low vascular occlusion.
abstract: Previous studies have demonstrated that a low-intensity resistance exercise, combined with vascular occlusion, results in a marked increase in muscular size and strength. We investigated the optimal pressure for reduction of muscle blood flow with resistance exercise to increase the muscular strength and endurance. Twenty-one subjects were randomly divided into four groups by the different application of vascular occlusion pressure at the proximal of thigh: without any pressure (0-pressure group), with a pressure of 50mmHg (50-pressure group), with a pressure of 150mmHg (150-pressure group), and with a pressure of 250mmHg (250-pressure group). The isokinetic muscle strength at angular velocities of 60 and 180 degrees /s, total muscle work, and the cross-sectional knee extensor muscle area were assessed before and after exercise. Exercise was performed three times a week over an 8-week period at an intensity of approximately 20% of one-repetition maximum for straight leg raising and hip joint adduction and maximum force for abduction training. A significant increase in strength at 180 degrees /s was noted after exercise in all subjects who exercised under vascular occlusion. Total muscle work increased significantly in the 50- and 150-pressure groups (P<0.05, P<0.01, respectively). There was no significant increase in cross-sectional knee extensor muscle area in any groups. In conclusion, resistance exercise with relatively low vascular occlusion pressure is potentially useful to increase muscle strength and endurance without discomfort.
authors: Department of Sports Medicine, School of Health and Sports Science, Juntendo University, Japan. sumide108@mtg.biglobe.ne.jp
authors: Takahiro
authors: T
authors: Sumide
authors: Keishoku
authors: K
authors: Sakuraba
authors: Keisuke
authors: K
authors: Sawaki
authors: Hirotoshi
authors: H
authors: Ohmura
authors: Yoshifumi
authors: Y
authors: Tamura
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D006621:Hip Joint / Q000502:physiology; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology; D007700:Kinetics; D007719:Knee Joint / Q000502:physiology; D008297:Male; D053580:Muscle Strength / Q000502:physiology*; D018482:Muscle, Skeletal / Q000098:blood supply* / Q000000981:diagnostic imaging / Q000502:physiology*; D010807:Physical Endurance / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology*; D011859:Radiography; D012039:Regional Blood Flow / Q000502:physiology; D055070:Resistance Training / Q000379:methods*; D019722:Sphygmomanometers; D013848:Thigh / Q000000981:diagnostic imaging; D014111:Tourniquets; D055815:Young Adult