Susceptibility to Exercise-Induced Muscle Damage: a Cluster Analysis with a Large Sample

Autor(es)

Damas, F. ^[1] ; Nosaka, K. ^[2] ; Libardi, C. A. ^[3] ; Chen, T. C. ^[4] ; Ugrinowitsch, C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Phys Educ & Sport, Av Prof Mello de Morais 65, BR-05508030 Sao Paulo - Brazil

^[2] Edith Cowan Univ, Sch Exercise, Biomed & Hlth Sci, Joondalup - Australia

^[3] Fed Univ Sao Carlos UFS Car, Dept Phys Educ, Sao Carlos - Brazil

^[4] Natl Taiwan Normail Univ, Dept Phys Educ, Taipei - Taiwan

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF SPORTS MEDICINE; v. 37, n. 8, p. 633-640, JUL 2016.
• Citações Web of Science: 19

Resumo

We investigated the responses of indirect markers of exercise-induced muscle damage (EIMD) among a large number of young men (N = 286) stratified in clusters based on the largest decrease in maximal voluntary contraction torque (MVC) after an unaccustomed maximal eccentric exercise bout of the elbow flexors. Changes in MVC, muscle soreness (SOR), creatine kinase (CK) activity, range of motion (ROM) and upper-arm circumference (CIR) before and for several days after exercise were compared between 3 clusters established based on MVC decrease (low, moderate, and high responders; LR, MR and HR). Participants were allocated to LR (n = 61), MR (n = 152) and HR (n = 73) clusters, which depicted significantly different cluster centers of 82 %, 61 % and 42 % of baseline MVC, respectively. Once stratified by MVC decrease, all muscle damage markers were significantly different between clusters following the same pattern: small changes for LR, larger changes for MR, and the largest changes for HR. Stratification of individuals based on the magnitude of MVC decrease post- exercise greatly increases the precision in estimating changes in EIMD by proxy markers such as SOR, CK activity, ROM and CIR. This indicates that the most commonly used markers are valid and MVC orchestrates their responses, consolidating the role of MVC as the best EIMD indirect marker. (AU)

• Processo FAPESP: 14/19594-0 - O papel do dano muscular na modulação da síntese protéica muscular
• Beneficiário: Felipe Romano Damas Nogueira
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 12/24499-1 - O papel da magnitude de dano muscular nas respostas hipertróficas
• Beneficiário: Felipe Romano Damas Nogueira
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 13/21218-4 - O papel da magnitude de dano muscular nas respostas hipertróficas
• Beneficiário: Cleiton Augusto Libardi
• Modalidade de apoio: Auxílio à Pesquisa - Regular