Strength gain through eccentric isotonic training without changes in clinical signs or blood markers

Autor(es):Mostrar menos -

Alves, Thamara ^[1] ; Guarnier, Flavia A. ^[1] ; Campoy, Fernanda A. S. ^[2] ; Gois, Mariana O. ^[3] ; Albuquerque, Maira C. ^[2] ; Seraphim, Patricia M. ^[2] ; Netto Junior, Jayme ^[2] ; Marques Vanderlei, Luiz Carlos ^[2] ; Padovani, Carlos R. ^[4] ; Cecchini, Rubens ^[1] ; Pastre, Carlos Marcelo ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Londrina, Dept Gen Pathol, Londrina - Brazil

^[2] Univ Estadual Paulista, Dept Phys Therapy, Presidente Prudente - Brazil

^[3] Univ Fed Sao Carlos, Dept Phys Therapy, BR-13560 Sao Carlos, SP - Brazil

^[4] Univ Estadual Paulista, Dept Biostat, Botucatu, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BMC MUSCULOSKELETAL DISORDERS; v. 14, NOV 21 2013.
• Citações Web of Science: 1

Resumo

Background: Localized exercises are widely used in rehabilitation processes. The predominant options are exercises with an emphasis on either concentric or eccentric contractions. Eccentric exercises promote greater strength gains compared to classical concentric stimuli, but can cause muscle damage. The aim of present study was to compare strength training composed of 10 sessions with progressive loads between groups with a predominance of concentric versus eccentric contraction through an analysis of isotonic strength, pressure pain threshold, creatine kinase, tumor necrosis factor-alpha and cortisol. Methods: One hundred twenty male subjects were divided into four groups: C1 and E1 - single session of maximum strength with emphasis on concentric and eccentric contraction, respectively; C10 and E10 - 10 sessions with progressive loads from 80% to maximum strength with emphasis on concentric and eccentric contraction, respectively. Results: Isotonic strength increased by 10% in E10 following the ten training sessions. C1 and E1 exhibited a lower pressure pain threshold 48 hours after the sessions in comparison to C10 and E10, respectively. Creatine kinase was increased in C1 in comparison to baseline, with significant differences (p <= 0.05) in comparison to E1 at 48 and 96 hours as well as C10 at 48, 72 and 96 hours. No significant differences were found in TNF-alpha or cortisol among the groups or evaluation times. Conclusion: Eccentric contraction training promotes functional adaptation. Moreover, both concentric and eccentric contraction training have a protective effect on the muscle in relation to a single session of maximum strength exercise. (AU)

• Processo FAPESP: 10/09687-0 - Efeitos do treinamento resisitido concêntrico versus excêntrico sobre parâmetros clínicos, funcionais, cardiovasculares e bioquímicos
• Beneficiário: Carlos Marcelo Pastre
• Modalidade de apoio: Auxílio à Pesquisa - Regular