Low-Intensity Sprint Training With Blood Flow Restriction Improves 100-m Dash

• Published in: Journal of strength and conditioning research Vol. 31; no. 9; p. 2462
• Main Authors: Behringer, Michael, Behlau, Daniel, Montag, Johannes C K, McCourt, Molly L, Mester, Joachim
• Format: Journal Article
• Language: English
• Published: United States 01.09.2017
• Subjects: Adult; Hamstring Muscles - physiology; Hemodynamics; Human Growth Hormone - blood; Humans; Hydrocortisone - blood; Insulin-Like Growth Factor I - analysis; Leg - blood supply; Male; Muscle, Skeletal - physiology; Physical Therapy Modalities; Quadriceps Muscle - physiology; Regional Blood Flow - physiology; Running - physiology; Sports; Testosterone - blood; Young Adult
• DOI: 10.1519/JSC.0000000000001746
• ISSN: 1064-8011

Behringer, M, Behlau, D, Montag, JCK, McCourt, ML, and Mester, J. Low-intensity sprint training with blood flow restriction improves 100-m dash. J Strength Cond Res 31(9): 2462-2472, 2017-We investigated the effects of practical blood flow restriction (pBFR) of leg muscles during sprint training on the 100-m dash time in well-trained sport students. Participants performed 6 × 100-m sprints at 60-70% of their maximal 100-m sprinting speed twice a week for 6 weeks, either with (intervention group [IG]; n = 12) or without pBFR (control group [CG]; n = 12). The 100-m dash time significantly decreased more in the IG (-0.38 ± 0.24 seconds) than in the CG (-0.16 ± 0.17 seconds). The muscle thickness of the rectus femoris increased only in the IG, whereas no group-by-time interactions were found for the muscle thickness of the biceps femoris and the biceps brachii. The maximal isometric force, measured using a leg press, did not change in either group. However, the rate of force development improved in the IG. Growth hormone, testosterone, insulin-like growth factor 1, and cortisol concentrations did not significantly differ between both groups at any measurement time point (pre, 1 minute, 20 minutes, 120 minutes, and 24 hours after the 6 all-out sprints of the first training session). The muscle damage marker h-FABP increased significantly more in the CG than in the IG. The pBFR improved the 100-m dash time significantly more than low-intensity sprint interval training alone. Other noted benefits of training with pBFR were a decreased level of muscle damage, a greater increase of the rectus femoris muscle thickness, and a higher rate of force development. However, the tested hormones were unable to explain the additional beneficial effects.