Joint-level energetics differentiate isoinertial from speed-power resistance training—a Bayesian analysis

PeerJ

article

Bernard X.W. Liew¹  Christopher C. Drovandi³  Samuel Clifford³  Justin W.L. Keogh⁵  Susan Morris²  Kevin Netto² 

[1] School of Sports, Exercise, Rehabilitation Sciences, University of Birmingham;School of Physiotherapy and Exercise Sciences, Curtin University of Technology;School of Mathematical Sciences, Queensland University of Technology;ARC Centre of Excellence for Mathematical and Statistical Frontiers;Faculty of Health Sciences and Medicine, Bond University;Sports Performance Research Centre New Zealand, Auckland University of Technology;Cluster for Health Improvement, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast

关键词: Vertical jump;    Kinetics;    Isoinertial;    Speed-power;    Bayesian;    Biomechanics;    Energetics;    Resistance training;   

DOI  :  10.7717/peerj.4620

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

BackgroundThere is convincing evidence for the benefits of resistance training on vertical jump improvements, but little evidence to guide optimal training prescription. The inability to detect small between modality effects may partially reflect the use of ANOVA statistics. This study represents the results of a sub-study from a larger project investigating the effects of two resistance training methods on load carriage running energetics. Bayesian statistics were used to compare the effectiveness of isoinertial resistance against speed-power training to change countermovement jump (CMJ) and squat jump (SJ) height, and joint energetics.MethodsActive adults were randomly allocated to either a six-week isoinertial (n = 16; calf raises, leg press, and lunge), or a speed-power training program (n = 14; countermovement jumps, hopping, with hip flexor training to target pre-swing running energetics). Primary outcome variables included jump height and joint power. Bayesian mixed modelling and Functional Data Analysis were used, where significance was determined by a non-zero crossing of the 95% Bayesian Credible Interval (CrI).ResultsThe gain in CMJ height after isoinertial training was 1.95 cm (95% CrI [0.85–3.04] cm) greater than the gain after speed-power training, but the gain in SJ height was similar between groups. In the CMJ, isoinertial training produced a larger increase in power absorption at the hip by a mean 0.018% (equivalent to 35 W) (95% CrI [0.007–0.03]), knee by 0.014% (equivalent to 27 W) (95% CrI [0.006–0.02]) and foot by 0.011% (equivalent to 21 W) (95% CrI [0.005–0.02]) compared to speed-power training.DiscussionShort-term isoinertial training improved CMJ height more than speed-power training. The principle adaptive difference between training modalities was at the level of hip, knee and foot power absorption.

【 授权许可】

CC BY