The acute effects of static stretching on peak force,peak rate of force development and muscle activity during single- and multiple-joint actions in older women |
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| Authors: | Raquel Gonçalves André Luiz Demantova Gurjão José Claudio Jambassi Filho Paulo De Tarso Veras Farinatti Lilian Teresa Bucken Gobbi Sebastião Gobbi |
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| Institution: | 1. Department of Physical Education , UNESP – University Estadual Paulista , Av 24A, 1515, Rio Claro , 13506-900 , Brazil;2. FAPESP - Funda??o de Amparo ? Pesquisa do Estado de S?o Paulo raquel_lafe@yahoo.com.br;4. Department of Physical Education , UNESP – University Estadual Paulista , Av 24A, 1515, Rio Claro , 13506-900 , Brazil;5. University of the State of Rio de Janeiro, Rua S?o Francisco Xavier 524/sala 8133F, Maracan? , Rio de Janeiro, RJ, Rio de Janeiro , 20550-013 , Brazil |
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| Abstract: | Abstract The present study investigated the acute effects of static stretching on peak force, peak rate of force development and integrated electromyography (iEMG) in 27 older women (65 ± 4 years; 69 ± 9 kg; 157 ± 1 cm; 28 ± 4 kg · m?2). The participants were tested during two exercises (leg press and knee extension) after two conditions: stretching and control. The data were collected on four days (counterbalanced with a 24-hour rest period). In the stretching condition, the quadriceps muscle was stretched (knee flexion) for three sets of 30 s with 30 s rest intervals. No significant difference was detected for peak force and peak rate of force development during the single- and multiple-joint exercises, regardless of the following interactions: condition (stretching and control) vs. time (pre x post x 10 x 20 x 30 minutes post; P > 0.05) and exercise vs. time (P > 0.05). Additionally, no significant interaction was found for the iEMG activity (condition vs. time; P > 0.05) in the single- and multiple-joint exercises. In conclusion, a small amount of stretching of an agonist muscle (quadriceps) did not affect the peak force, peak rate of force development and EMG activity in older women during single- and multiple-joint exercises. |
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| Keywords: | aging warm-up isometric force-time curve performance |
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