Revista Fisio&terapia · Feb 28, 2026
Isokinetic strength parameters of the knee extensor and flexor muscles in older women participating in multicomponent and resistance training
By Ferreira GGDA
INTRODUCTION: Aging is associated with progressive declines in muscle strength, especially in the lower limbs, which may compromise functional capacity and increase the risk of falls in older adults. Regular physical exercise, including multicomponent and resistance training, has been identified as an effective strategy to attenuate these effects. Assessment of muscle strength using isokinetic dynamometry allows objective analysis of relevant biomechanical parameters. OBJECTIVE: To assess the isokinetic strength parameters of the knee extensor and flexor muscles in older women participating in multicomponent training combined with resistance training. METHODS: A descriptive, cross-sectional field study conducted with 15 physically active older women, with a mean age of 73.5 ± 7.1 years. Isokinetic strength was assessed using a Biodex System 3 isokinetic dynamometer, considering the variables peak torque, total work, and agonist-antagonist ratio during concentric muscle actions of the knee extensors and flexors. RESULTS: The mean values observed were 96.2 ± 20 Nm for extension peak torque, 52.2 ± 16.2 Nm for flexion peak torque, 815.2 ± 180.4 J for total extension work, 463.3 ± 119.9 J for total flexion work, and 53.9 ± 12.1% for the agonist-antagonist ratio. CONCLUSIONS: The older women assessed exhibited isokinetic strength parameters consistent with the maintenance of muscle function, suggesting positive effects of regular physical exercise on lower limb strength in this population.