Quadriceps intramuscular fat fraction rather than muscle size is associated with knee osteoarthritis

Quadriceps femoris muscle fatigue in patients with knee osteoarthritis

The purpose of this study was to characterize quadriceps femoris muscle fatigue of both lower extremities in patients with knee osteoarthritis (OA). Sixty-two subjects (mean age 68.2 years, standard deviation [SD] ± 7.9 years) with knee OA participated in the study. Significantly higher knee pain was reported in the involved knee than in the contralateral knee, as determined by a visual analog ...

Quadriceps Strength and Knee Osteoarthritis

restorative effect of vitamin d deficiency on knee pain and quadriceps muscle strength in knee osteoarthritis

both vitamin d deficiency and quadriceps muscle weakness are associated with knee osteoarthritis (koa) and pain. the aim of this study was to determine the restorative effect of vitamin d deficiency on pain and quadriceps muscle strength in knee osteoarthritis. patients with koa aged≥30 years, the presence of knee pain for at least one month or longer and serum 25-hydroxyvitamin (25-ohd) defici...

Total Knee Replacement Sizing: Shoe Size Is a Better Predictor for Implant Size than Body Height

Background: Various sizes of implants need to be available during surgery. The purpose of this paper is to comparebody height and shoe size with implant sizes in patients who underwent total knee replacement surgery to see whichbiomarker is a better predictor for preoperative planning to determine implant size.Methods: A total of 100 knees, belonging to 50 females and 50 males, were observed. P...

Muscle coordination is habitual rather than optimal.

When sharing load among multiple muscles, humans appear to select an optimal pattern of activation that minimizes costs such as the effort or variability of movement. How the nervous system achieves this behavior, however, is unknown. Here we show that contrary to predictions from optimal control theory, habitual muscle activation patterns are surprisingly robust to changes in limb biomechanics...