Publication
Back squat mechanics in persons with a unilateral transtibial amputation: A case study
Publisher:
Ovid Technologies (Wolters Kluwer Health)
Date:
16-11-2021
DOI:
10.1097/PXR.0000000000000058
Abstract: A 30-year-old person with a unilateral transtibial utation (TTAmp) was assessed performing an Olympic-style back squat with an energy storage and return prosthetic foot. Determine joint-level movement strategies of an in idual with TTAmp while performing an Olympic-style back squat. Case study design. Back squat mechanics are evaluated in an in idual with TTAmp by comparing the contribution of the ankle, knee, and hip joint to total positive and negative utated and sound limb work. The hip joint was the greatest contributor to total positive limb work compared with the knee and ankle, respectively, in the utated (55.0% hip vs. 30.8% knee, P 0.001 vs. 14.2% ankle, P = 0.001) and sound limbs (52.2% hip vs. 38.9% knee, P 0.001 vs. 8.9% ankle, P 0.001). The hip joint was the greatest contributor to total negative limb work compared with the ankle in both the utated (51.0% hip vs. 15.9% ankle, P 0.001) and sound limbs (47.3% hip vs. 10.0% ankle, P 0.001) and the knee in the utated limb (51.0% hip vs. 32.5% knee, P 0.001). Ankle joint power demonstrated an atypical bimodal negative ositive/negative ositive pattern. The in idual with TTAmp used a hip-dominant joint strategy in both the utated and sound limbs while demonstrating more potential to optimize the prosthetic foot’s energy storage and return capabilities when performing a back squat.