title: Optimal load for the peak power and maximal strength of the upper body in Brazilian Jiu-Jitsu athletes.
abstract: We determined the optimal load for the peak power output (PPO) during the bench press throw (BPT) in Brazilian Jiu-Jitsu (BJJ) athletes and compared the PPO and maximal strength between advanced (AD) and nonadvanced (NA) athletes. Twenty-eight BJJ athletes (24.8 ± 5.7 years) performed the BPT at loads of 30, 40, 50, and 60% of their 1 repetition maximum (RM) in a randomized order (5-minute rest between BPTs). The PPO was determined by measuring the barbell displacement by an accelerometer (Myotest). The absolute (F = 7.25; p < 0.001; effect size [ES] = 0.21) and relative intensities were different (F = 7.11; p < 0.001; ES = 0.21) between the AD and NA. There was also a group and intensity interaction effect (F = 2.79; p = 0.046; ES = 0.10), but the differences were centered around the AD group, which achieved higher values using 40% (p = 0.001) and 50% of the 1RM (p < 0.001) than the PPO with 60% of 1RM. The AD athletes presented with higher 1RM than NA (p ≤ 0.05; ES = 1.0), but there was no difference (p > 0.05) in the PPO (30-60% 1RM). A polynomial adjustment indicated that the optimal load was ∼42% of 1RM for all groups and subgroups (R from 0.82 to 0.99). Our results suggest that there can be (1RM) differences between AD and NA BJJ athletes; however, there is no difference in the muscle power between the AD and NA groups. Additionally, ∼42% of 1RM seems to be the optimal load for developing maximal power using the BPT for the BJJ athletes.
authors.affiliation: 1Human Performance and Sport Research Group, Postgraduate Program in Physical Education, Federal University of Triangulo Mineiro, Uberaba, MG, Brazil; 2Department of Environmental, Biological and Health Sciences, University Center of Belo Horizonte (Uni-BH), Belo Horizonte, Brazil; and 3Martial Arts and Combat Sports Research Group, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil.
authors.forename: Bruno Victor C
authors.initials: BV
authors.lastname: da Silva
authors.forename: Mário A de Moura
authors.initials: MA
authors.lastname: Simim
authors.forename: Moacir
authors.initials: M
authors.lastname: Marocolo
authors.forename: Emerson
authors.initials: E
authors.lastname: Franchini
authors.forename: Gustavo R
authors.initials: GR
authors.lastname: da Mota
mesh_terms: D000293:Adolescent; D000328:Adult; D001938:Brazil; D006801:Humans; D008297:Male; D016139:Martial Arts / Q000145:classification / Q000502:physiology*; D053580:Muscle Strength / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology*; D055070:Resistance Training / Q000379:methods*; D060726:Torso; D034941:Upper Extremity; D014891:Weight Lifting / Q000502:physiology; D055815:Young Adult