Acute effects of two different stretching techniques on isokinetic strength and power

Abstract

a b s t r a c tObjectives: To examine and compare the acute effects of short duration static and dynamic lower-limb stretching routines on the knee flexor and extensor peak torque and mean power during maximal concentric and eccentric muscle actions. Method: Forty-nine active adults completed the following intervention protocols on separate days: non-stretching, static stretching and dynamic stretching. After the stretching or control intervention, concentric and eccentric isokinetic peak torque and mean power of the leg extensors and flexors were measured in prone position. Measures were compared via a fully-within-groups factorial ANOVA. Results: Neither static nor dynamic stretching has influence on isokinetic peak torque and mean power when they were compared with the control condition. Paired comparison also showed that the isokinetic strength and power results reported by dynamic stretching session were slightly higher than those found during the static stretching session. Conclusions: Short pre-exercise static and dynamic lower-limb stretching routines did not elicit stretching-induce reductions or improvements in knee flexor and knee extensor isokinetic concentric and eccentric strength. In addition, the findings of the current study support the claim that dynamic stretching may be preferable to static stretching as part of a warm-up designed to prepare for physical activity.

Efecto de un calentamiento específico basado en HIIT sobre los niveles de potencia muscular en estudiantes de cuarto medio

“…Corresponde a la capacidad de mantener una tensión a un nivel constante por un tiempo prolongado, resistiendo el agotamiento muscular que provoca una sobrecarga de una modalidad deportiva específica. Este tipo de fuerza, al igual que la fuerza máxima y veloz, posee varias formas de medición y control (Ayala, De Ste Croix, Sainz De Baranda, & Santonja, 2015;Ogaya, Takahashi, Shioiri, Saito, & Okajima, 2012).…”

Instrument-assisted Soft Tissue Mobilization Improves Physical Performance of Young Male Soccer Players

“…For measuring isokinetic power, ankle plantar flexion and dorsiflexion and knee extension and flexion in both legs were measured separately (Isoforce, Sungdo MC, Korea). Isokinetic equipment is considered the most accurate equipment for measuring muscle strength in athletes [1]. Particularly, measuring isokinetic power provides more accurate data and is safer than measuring isometric or isotonic muscle strength; thus, it is used often for conducting exercise programs with muscle function and muscle fatigue assessments [24].…”

“…Particularly, measuring isokinetic power provides more accurate data and is safer than measuring isometric or isotonic muscle strength; thus, it is used often for conducting exercise programs with muscle function and muscle fatigue assessments [24]. Prior to the measurements, calibration was performed on all participants, while sufficient time was provided for practice, and explanations were provided to prevent adverse reactions [1]. To measure muscle strength purely from the knees and ankles, the other body parts were fixated with a belt.…”

Exercícios De Alongamento: Prescrição E Efeitos Na Função Musculoesquelética De Adultos E Idosos

“…Para idosos, a indicação é que a duração do alongamento seja maior, entre 30 e 60s. Entretanto, analisando os estudos citados nessa atualização, pode-se observar que as durações adotadas para adultos jovens e idosos estiveram entre 10s e 60s (SIATRAS et al, 2008;MCHUGH;NESSE, 2008;ROBBINS;SCHEUERMANN, 2008;VAREJÃO;DANTAS;MATSUDO, 2007;CHRISTIANSEN, 2008;RYAN et al, 2008;LUSTOSA et al, 2010;MIZUNO et al, 2013;GALLO et al, 2013;AYALA et al, 2015;FREITAS et al, 2016 Para a população idosa, Gallo et al (2013) compararam os efeitos de duas diferentes durações de alongamento estático ativo, 30s e 60s, realizadas com 3 repetições (3x/semana, durante 16 semanas) na funcionalidade de idosas da comunidade. Foram encontradas melhora da ADM, resistência de força muscular, resistência aeróbica e índice de aptidão funcional geral para os grupos que treinaram quando comparados ao grupo controle, mas não se observou diferença entre os grupos 30s e 60s.…”