• Felipe Marrese Bersotti, Luis Mochizuki, Guilherme Carlos Brech, André Luiz de Seixas Soares, Jose Maria Soares-Junior, Edmund Chada Baracat, Julia Maria D'Andrea Greve, and Angelica Castilho Alonso.
• School of Arts Sciences and Humanities, Universidade de São Paulo, São Paulo, SP, Brazil.
• Clinics (Sao Paulo). 2022 Jan 1; 77: 100125100125.

ContextIn the elderly, weak lower limb muscles impair functional tasks' performance.ObjectiveTo evaluate the healthy elderly's ankle dorsiflexion and plantarflexion maximum torque and its variability in two sets of 5 RM isokinetics evaluation.Method50 women (68.0 ± 4.6 years old) and 50 men (72.7 ± 8.5 years old) did two sets of ankle plantar flexor and dorsiflexor isokinetic tests at 30°/s. Peak torque, total work, and coefficient of variation were analyzed.ResultsMen did the strongest plantarflexion torque (p < 0.05) and dorsiflexion torque (p < 0.05); their highest peak torque occurred at set 2 (p < 0.05), while the largest plantarflexion torque variability (p < 0.05), dorsiflexion torque variability (p < 0.05), and the largest plantarflexion torque variability occurred at set 1 (p < 0.05). Men did the highest plantarflexion and dorsiflexion total work (p < 0.05) at set 2 (p < 0.05).ConclusionOlder men are stronger than older women. The torque variability, in men, was higher during the first set, suggesting an adaptation to the isokinetics evaluation. Clinicians and researchers should consider that different muscles might need different numbers of sets and trials to measure their maximal muscle strength.Copyright © 2022 HCFMUSP. Published by Elsevier España, S.L.U. All rights reserved.

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