Isokinetic arm and shoulder muscle torque-velocity characteristics in mobility limited children and adolescents with spina bifida

Martins, Emanuela Juvenal; Serrão, Paula Regina Mendes da Silva; Leonardi-Figueiredo, Marisa Maia; Ravanelli, Letícia S; Serenza, Felipe de Souza; Mattiello, Stela Márcia; Aagaard, Per; Mattiello-Sverzut, Ana Cláudia

doi:10.1080/09593985.2022.2150529

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2024

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Cited by 2 publications

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A deficit to reach the isokinetic velocity in youth wheelchair users with spina bifida

Martins,

Franco,

Siqueira

et al. 2024

The Journal of Spinal Cord Medicine

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A deficit to reach the isokinetic velocity in youth wheelchair users with spina bifida

Martins,

Franco,

Siqueira

et al. 2024

The Journal of Spinal Cord Medicine

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The Trade-Off Between Torque and Power with Speed: A Study of Shoulder Performance During an Isokinetic and Multiplanar Task

Lee,

Rainbow

2024

Preprint

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The human shoulder likely evolved under selective pressures favouring diverse tasks that require high mobility, speed, and torque. For example, humans are uniquely adept at high-speed and accurate throwing. Prior work has aimed to quantify the kinematics and kinetics of upper limb movements in isometric or uniplanar motions. However, we still do not fully understand the trade-offs of shoulder torque and power with angular velocity during functional tasks that are reflective of demands that may be relevant to the shoulder's evolution. We developed a novel approach for upper limb 3D inverse dynamic calculations by integrating motion capture with an instrumented cable machine. Twenty-five participants performed a crossbody, isokinetic upper limb motion at various cable speeds in a rigid and free torso condition (self-imposed). Shoulder torque decreased significantly (p < 0.05) with increasing angular velocity in 19 and 16 participants for the constrained and unconstrained conditions, respectively. Shoulder power increased significantly (p < 0.05) with angular velocity for 6 and 11 participants for constrained and unconstrained, respectively. T-tests revealed no statistical difference between the torso conditions for torque and power against angular velocity. Our findings suggest that despite having a trade-off in torque and velocity, the shoulder may be tuned to produce power over a wide range of velocities independent of energy transfer from the lower extremities.

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Isokinetic arm and shoulder muscle torque-velocity characteristics in mobility limited children and adolescents with spina bifida

Cited by 2 publications

References 56 publications

A deficit to reach the isokinetic velocity in youth wheelchair users with spina bifida

A deficit to reach the isokinetic velocity in youth wheelchair users with spina bifida

The Trade-Off Between Torque and Power with Speed: A Study of Shoulder Performance During an Isokinetic and Multiplanar Task

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