Hip, Knee, and Ankle Osteoarthritis Negatively Affects Mechanical Energy Exchange

• DOI: 10.1007/s11999-016-4921-1
• Publication Date: 2016-06-10T14:43:39Z
• Authors: Robin M. Queen; Tawnee L. Sparling; Daniel Schmitt
• Keywords: Ground reaction force

Background Individuals with osteoarthritis (OA) of the lower limb find normal locomotion tiring compared individuals without OA, possibly because OA any joint changes mechanics and may disrupt transfer potential kinetic energy center mass during walking, resulting in increased locomotor costs. Although recovery has been explored asymptomatic some patient populations, effect these gait parameters on movements mechanical work patients specific joints not well examined. The results can be used to inform clinical interventions rehabilitation that focus improving recovery. Questions/purposes We hypothesized (1) end-stage extremity would exhibit a decrease walking velocity affected differntially influence velocity, (2) show decreased hip ankle have greater reductions than knee owing restrictions motion, (3) differences amplitude congruity explain are observed each population. Methods Ground reaction forces at range self-selected speeds were collected from radiographic (n = 27; 14 males, 13 females; average age, 55.6 years; range, 41-70 years), 20; seven 61.7 49-74 30; 16 57 45-70 13; eight five 49.8 41-67 years). Participants all who scheduled replacement surgery within 4 weeks testing. All identified by orthopaedic surgeon as having disease candidate for surgery. Patients excluded if they had pain other joint, previous surgery, or needed use an assistive device ambulation. enrolled met study inclusion criteria. Our was comparative cohorts could other, however, group served verify our methods provided standard which we compare patients. Potential relationships (% congruity) exchange recovery) calculated. Linear regressions examine fluctuations % Analysis covariance between groups. Results this support hypothesis walk slower (1.4 ± 0.2 m/second, 1.2-1.5 m/second) also affects (p < 0.0001). cohort (0.9 0.77-0.94 walked speed relative (1.1 0.96-1.1 m/second; p 0.002). However, when comparing there no difference 0.16) same true 0.14). Differences existed examining cohorts. After adjusting showed (65% 3%, 63%-67%) (54% 10%, 50%-58%; 0.014) (47% 13%, 40%-52%; 0.002) but different (57% 53%-62%; 0.762). When accounted for, 80% variation attributable explained only 10% being amplitude. Conclusions hip, knee, reduces effective energy, potentially increasing muscular required control mass. Clinical Relevance fatigue limited physical activity reported associated Focused retraining improve