This group consists of patients who have been diagnosed with knee osteoarthritis. They will be subjected to a series of tests to assess the maximal rate of force development of ankle muscles and their functional abilities.

This group will include healthy individuals without knee osteoarthritis. They will undergo the same series of tests to serve as a control group, enabling the comparison of results with the Knee OA Patients group.

This test is designed to measure the maximal rate of force development in the ankle muscles, specifically the plantar flexors. It aims to assess the relationship between the strength of these muscles and the functional ability in patients with knee osteoarthritis. The results from this test will help to understand how lower limb muscle strength influences the symptoms and progression of knee osteoarthritis.

The KOOS is a questionnaire that assesses five aspects of knee injury and osteoarthritis: pain, symptoms, ADL function, sport and recreation function, and quality of life. Scores are transformed to a 0-100 scale, with zero representing extreme knee problems and 100 representing no knee problems. Higher scores indicate better function and less pain.

This functional ability test requires participants to perform as many repetitions as possible in 30 seconds of a specific movement. The number of valid repetitions performed in this duration is recorded.

n this test, participants hop forward as far as possible on one leg, and the distance hopped is recorded.

This procedure involves conducting tests of three (60°/s) or five (120°/s) maximal nonconsecutive efforts with specific rest intervals. Each subject is instructed to exert maximal effort throughout the whole range of motion.

The RFD is a measure of the speed at which the force of a muscle contraction develops. It is typically measured during isometric contractions and provides information about the muscle's explosive strength capacity.