Eficácia do pré-condicionamento isométrico na proteção contra diferentes magnitudes de dano muscular induzido pelo exercício

• Autor(a) principal: Barreto, Renan Vieira [UNESP]
• Data de Publicação: 2018
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/203616; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2019-05-29/000916101.pdf
• topic: Musculos; Musculos - Ferimentos e lesões; Exercícios físicos; Dor musculoesquelética; Força muscular

Muscle damage often occurs after unaccustomed exercises, especially those involving eccentric contractions. Some of the most frequently assessed symptoms of muscle damage are muscle swelling, soreness and compromised force production capacity. Recent studies have demonstrated that muscle damage symptoms are attenuated when maximal isometric contractions are performed a few days prior to damaging exercises. However, it is still not established if the protective effect conferred by an isometric pre-conditioning protocol is the same for different magnitudes of muscle damage, induced by different muscle efforts. Therefore, the purpose of this study was to investigate if the same pre-conditioning protocol attenuates the magnitude of muscle damage induced by different maximal eccentric contractions protocols in the elbow flexors. Forty untrained men were assigned to one of two experimental or two control groups (n = 10 each group). Subjects in the experimental groups performed 10 maximal isometric contractions of the elbow flexors at a long muscle length (20° of elbow flexion), 2 days prior to either slow (60°.s-1 - ISO-L) or fast (180°.s-1 - ISO-R) maximal isokinetic eccentric contractions of the elbow flexors. Subjects in the control groups performed either slow (CON-L) or fast (CON-R) eccentric contractions without isometric pre-conditioning. Maximal voluntary isokinetic concentric force and muscle soreness were assessed before, immediately after, and 1-4 days following the eccentric exercise. Changes over time and between groups for these variables were tested by two-way ANOVAs with Bonferroni's post-hoc tests