Sit-to-stand transfer mechanics in healthy older adults: a comprehensive investigation of a portable lifting-seat device.

Purpose: To evaluate lower extremity mechanics and muscle activation associated with the sit-to-stand transfer using a portable lifting-seat device and to compare these data to an unassisted transfer in healthy young and older adults.

Methods: Bilateral lower extremity and low back musculature electromyography, three-dimensional leg and trunk motion, and ground reaction forces were recorded from 10 young (mean age = 25) and 10 older (mean age = 69) adults during five trials of (i) no assist and (ii) assisted transfers. Data were time normalized to represent the period of seat-off to standing.

Is there a dose response for valgus unloader brace usage on knee pain, function, and muscle strength?

Objective: To examine whether there was a dose response for valgus unloader brace wear on knee pain, function, and muscle strength in participants with medial compartment knee osteoarthritis.

Design: In this single-group study, participants with medial compartment knee osteoarthritis were followed for approximately 6 months.

Setting: Recruitment was conducted in the general community, and testing was performed at a university laboratory.