Peak torque and total amount of work of hip flexors and extensors will be determined by the Cybex 6000 model computer-aided isokinetic system.

Ultrasonographic evaluations will be performed with a 5-12 MHz linear probe (Logic e portable; GE Healthcare, China). The thicknesses of the hip flexor (psoas major) and extensor (gluteus maximus) muscles will be measured while the patient is in the prone position, in accordance with the literature.

Functional performance will be assessed by 6MWT (in meter). Patients will be instructed to walk quickly, safely, and as much distance as possible over a rectangular path.

The short-distance over-ground gait speed will be assessed using a 10-Meter Walk Test. Participants will be asked to walk at normal pace on a 10-meter walkway.

Timed up and go test will be used for quantifying functional mobility balance. Participants will be instructed to sit in a comfortable position on a 45-65 cm high steady chair with a backrest and armrest, with both arms resting on their thighs, and then quickly stand up and move towards and around a fixed cone 3 m away, return, and sit again.