Author(s): Morcelli, Mary Hellen [UNESP] ; Rossi, Denise Martineli ; Karuka, Aline Harumi [UNESP] ; Crozara, Luciano Fernandes [UNESP] ; Hallal, Camilla Zamfolini ; Marques, Nise Ribeiro [UNESP] ; Goncalves, Mauro [UNESP] ; Navega, Marcelo Tavella [UNESP]
Date: 2018
Persistent ID: http://hdl.handle.net/11449/161176
Origin: Oasisbr
Subject(s): Accidental falls; aged; dynamometer; hip; muscle strength
Made available in DSpace on 2018-11-26T16:19:26Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-01-02
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação para o Desenvolvimento da UNESP (FUNDUNESP)
Impaired muscle function at the hip has been implicated to be a major factor related to falls in older adults. Therefore, the aim of this study was to analyze the rate of torque development (RTD), reaction time (RT), and peak torque (PT) of hip abductors and hip adductors in young women (YW), older women nonfallers (ONF), and older women fallers (OF). Eighteen YW and 44 older women divided among OF (n = 20) and ONF (n = 24) performed maximum isometric hip abductor and adduction contractions on a dynamometer. YW had 40% greater PT and 61.5% greater RTD for hip abductors than the ONF. Compared with OF, YW had 47.5% greater PT and 68% greater RTD. OF showed less RTD at 150 ms (31%) and 200 ms (34.5%) than ONF for hip abductors. PT of hip adductors was 52% greater in YW than in the two older groups, whereas RTD was 71% greater. OF showed less RTD than ONF for hip abductors according to standardized effect sizes. No RT differences were observed between the three groups. We conclude that older women (OF and ONF) have less strength and ability to develop force rapidly than YW for hip abductors and adductors. Low hip strength and slowed force development in ONF during hip abduction may increase fall risk in older women.
Sao Paulo State Univ, Dept Phys Educ, Rio Claro, Brazil
Univ Sao Paulo, Med Coll Ribeirao Preto, BR-14049 Ribeirao Preto, Brazil
Sao Paulo State Univ, Dept Phys Therapy, Presidente Prudente, Brazil
Univ Fed Uberlandia, Dept Phys Therapy, Av Engenheiro Dinz 1178,CP 593, BR-38400 Uberlandia, MG, Brazil
Sao Paulo State Univ, Dept Phys Therapy & Occupat Therapy, Marilia, Brazil
Sao Paulo State Univ, Dept Phys Educ, Rio Claro, Brazil
Sao Paulo State Univ, Dept Phys Therapy, Presidente Prudente, Brazil
Sao Paulo State Univ, Dept Phys Therapy & Occupat Therapy, Marilia, Brazil
