Muscle damage responses to resistance exercise performed with high-load versus low-load associated with partial blood flow restriction in young women. Issue 1 (2nd January 2020)

• Record Type: Journal Article
• Authors: Alvarez, Ieda Fernanda; Damas, Felipe; Biazon, Thaís Marina Pires de; Miquelini, Maiara; Doma, Kenji; Libardi, Cleiton Augusto
• Is Part Of: European journal of sport science. Volume 20:Issue 1(2020)
• Page Start: 125
• Page End: 134
• Publication Date: 2020-01-02
• Subjects: Occlusion training -- recovery -- strength -- muscle soreness -- physiology -- musculoskeletal; Sports sciences -- Periodicals; Sports Medicine -- Periodicals; Exercise -- Periodicals; Sports -- Periodicals; 612
• DOI: 10.1080/17461391.2019.1614680
• Languages: English
• ISSNs: 1746-1391

Abstract

Abstract: The aim of this study was to compare if an acute exercise session of high-load resistance training (HL-RT, e.g. 70% of 1 repetition-maximum, 1 RM) induces a higher magnitude of muscle damage compared with a RT protocol with low-loads (e.g. 20% 1 RM) associated with partial blood flow restriction (LL-BFR), and investigate the recovery in the days after the protocols. We used an unilateral crossover research design in which 10 young women (22(2) y; 162(5) cm; 66(11) kg) performed HL-RT and LL-BFR in a randomized, counterbalanced manner with a minimum interval of 2 weeks between protocols. Indirect muscle damage markers were evaluated before and once a day for 4 days into recovery. Main results showed decreases of 8–12% at 24–48 h in maximal voluntary isometric and concentric contraction torques ( P < 0.03), and changes in muscle architecture markers ( P < 0.03) for HL-RT and LL-BFR, with no differences between protocols ( P > 0.05). Moreover, delayed onset muscle soreness increased only after LL-BFR ( P < 0.001). We conclude that an acute bout of low volume HL-RT or LL-BFR to failure resulted in edema-induced muscle swelling, but do not induce major or long-lasting decrements in muscle function and the level of soreness promoted from LL-BFR was mild.