Biomechanic characteristics of the patellofemoral joints of older adults when descending the stairs

Patellofemoral joint stress (PFJS) was used to quantitatively assess the biomechanic characteristics of the patellofemoral joint of older adults when descending the stairs. Compared with young adults, older adults had lower knee moment in the sagittal plane, quadriceps strength, and PFJS, which may be associated with muscle loss and patellofemoral cartilage defects related to aging. Therefore, older adults have a lower patellofemoral joint pressure compared with young adults.