Document Type



This study assessed the kinetic demands of ambulatory assistance devices and the subject’s perceptions of each. Twelve subjects used a knee roller (KR), a hands free crutch (HFC), and conventional axillary crutches (CC), while walking over a force platform. Ground reaction forces (GRF) were obtained for each device for the unaffected and the affected limb. Significant differences in GRF for each device were found for each limb (p ≤ 0.001). No gender interaction was found (p > 0.05). The GRF of the un-affected limb was highest for the CC and lowest for the KR (p ≤ 0.05). The GRF of the affected limb was higher for the KR compared to the HFC (p =.045). For the unaffected limb, the CC produced 45% more kinetic demand than the KR, and 11% more than the HFC. However, the qualitative analysis suggested that the CC and KR were favored over the HFC.

New Investigator Award