An investigation into the correlation between core muscle strength and flexibility of the rectus femoris, as well as quadriceps strength, among both normal-weight and obese patients with knee osteoarthritis.

The study aimed to investigate the relationship between core muscle strength, rectus femoris flexibility, and quadriceps strength in patients with knee osteoarthritis (OA), considering both obese and non-obese individuals. Participants aged between 40 and 70 were recruited based on knee OA grades 2 and 3. Demographic information was used to categorize participants into obese and non-obese groups. Subsequently, participants underwent assessments for core muscle strength, rectus femoris flexibility, and quadriceps strength, with the collected data compared between the two groups. Various outcome measures such as the Pressure Biofeedback Unit, Isokinetic Dynamometer, Ely’s Test, and Visual Analogue Scale (VAS) were employed for the assessments.