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Comparison of seat, waist, and arm sit-to-stand assistance modalities in elderly population

Comparison of seat, waist, and arm sit-to-stand assistance modalities in elderly population. Jeswin Jeyasurya, MASc; H. F. Machiel Van der Loos, PhD; Antony Hodgson, PhD; Elizabeth A. Croft, PhD. Aim

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Comparison of seat, waist, and arm sit-to-stand assistance modalities in elderly population

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  1. Comparison of seat, waist, and arm sit-to-stand assistance modalities in elderly population Jeswin Jeyasurya, MASc; H. F. Machiel Van der Loos, PhD; Antony Hodgson, PhD; Elizabeth A. Croft, PhD

  2. Aim • Investigate mechanics of assisted sit-to-stand (STS) motion to better understand how load-sharing STS mechanisms may facilitate STS motions while still requiring activation of leg muscles. • Relevance • STS motion is important for ambulatory adults’ independent function and daily activities. • However, full dependence on mechanical STS assistance can lead to leg muscle atrophy.

  3. Method • Conducted experiments with 17 nondisabled older adults performing: • Unassisted STS rises. • Assisted STS rises with grab bar, arm, seat, and waist assistance. • Evaluated: • Each mode of rise base on subject questionnaire. • Key biomechanical metrics relating to stability, knee effort reduction, and rise trajectory.

  4. Results • Seat and waist assistance provided: • Significant improvements in stability metrics. • Reductions in required knee torques over unassisted rises and bar assistance. • Subjects preferred seat and bar assistance.

  5. Conclusion • Seat-assisted STS modality is favored for nonclinical applications. • Further testing of this modality with clinical population is indicated.

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