Effects of far infrared rays emitting clothing on recovery after an intense plyometric exercise bout applied to elite soccer players: a randomized double-blind placebo-controlled trial Irineu Loturco, Cesar Cavinato Cal Abad, Fabio Yuzo Nakamura, Solange de Paula Ramos, Ronaldo Kobal, Saulo Gil, Lucas Adriano Pereira, Franz Homero Pagani Burini, Hamilton Roschel, Carlos Ugrinowitsch, Valmor Tricoli Biol Sport 2016; 33(3):277-283 ICID: 1208479
Article type: Original article
IC™ Value: 10.00
Abstract provided by Publisher
The aim was to investigate the effects of far infrared (FIR) ray emitting clothes on indirect markers of exercise-induced muscle damage and physical performance recovery after a plyometric bout applied to soccer players. Twenty-one male players (18.9±0.6 years; 70.8±5.01 kg; 178.3±0.06 cm) performed 100 drop-jumps. Six hours after the bout, athletes put on FIR clothes (FIR) (density of 225 g · m-2, 88% far infrared rays emitting polyamide 66 Emana yarn (PA66) fibre, 12% Spandex, emissivity of 0.88 and power emitted of 341 W/m2µm at 37°C in the 5-20 µm wavelength range, patent WO 2009/077834 A2) (N=10) or placebo clothes (PLA) (N=11). Mid-thigh circumferences, creatine kinase (CK), and delayed-onset muscle soreness (DOMS) were assessed before, immediately after and 24, 48, and 72 h after the bout. Squat (SJ) and countermovement jump (CMJ) heights were measured before and at 24, 48, and 72 h after, while 1RM leg press (maximum strength) was measured before and at 72 h after the plyometrics. No differences between groups were found in mid-thigh circumferences, SJ, CMJ or 1RM. CK increased significantly 24 h after the plyometrics in comparison to before (p<0.05) in both groups. PLA showed significant DOMS increases at 24, 48, and 72 h, while FIR showed significant increases at 24 and 48 h (p<0.05). DOMS effect sizes were greater in FIR (moderate at 48 h, ES=0.737 and large at 72 h, ES=0.844), suggesting that FIR clothes may reduce perceived DOMS after an intense plyometric session performed by soccer players.