Knee kinetics and kinematics of young asymptomatic participants during single-leg weight-bearing tasks: task and sex comparison of a cross-sectional study

• Autor(a) principal: Gustavo Luiz Bellizzi
• Data de Publicação: 2022
• Outros Autores: Tenysson Will de Lemos, Renan Alves Resende, Ana Cristina Cervi, Paulo Roberto Pereira Santiago, César Fernández de las Penas, Debora Bevilaqua Grossi, Lidiane Lima Florencio
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFMG
• Texto Completo: https://doi.org/10.3390/ijerph19095590; http://hdl.handle.net/1843/65098; https://orcid.org/0000-0002-9080-6088; https://orcid.org/0000-0002-1609-3278; https://orcid.org/0000-0002-9460-8847; https://orcid.org/0000-0003-3772-9690; https://orcid.org/0000-0003-3290-3661
• topic: Kinetic; Inverse dynamics; Knee joint; Kinematic; Exercise; Functional assessment; Biomechanics; Cinética; Articulação do joelho; Cinemática; Exercício físico; Fenômenos biomecânicos

This cross-sectional study aimed to describe and compare kinetic and kinematic variables of the knee joint during stair descent, single-leg step down, and single-leg squat tasks. It also aimed to investigate potential sex difference during the tasks. Thirty young asymptomatic individuals (15 males, 15 females) were assessed during the performance of single-leg weight-bearing tasks. The kinetic and kinematic data from the knee were evaluated at the peak knee moment and at peak knee flexion. Single-leg squat presented a higher peak knee moment (2.37 Nm/kg) and the greatest knee moment (1.91 Nm/kg) at knee peak angle in the frontal plane, but the lowest knee flexion (67°) than the other two tasks (p < 0.05). Additionally, the single-leg step down task presented a higher varus knee angle (5.70°) when compared to stair descent (3.71°) (p < 0.001). No substantial sex difference could be observed. In conclusion, in asymptomatic young individuals, single-leg squats presented the greatest demand in the frontal and sagittal planes. Single-leg step down demanded a greater angular displacement than stair descent in the frontal plane. We did not identify a significant difference among the sex and studied variables.