Figure 5From: Effects of methods of descending stairs forwards versus backwards on knee joint force in patients with osteoarthritis of the knee: a clinical controlled study Parallel between FD and BD. The circles indicate KJF-MAX. The dotted-line circles indicate the strong contractions of the muscle groups at KJF-MAX. Forward descending: increased tension in the knee extensors and ankle plantar flexors occurs. Backward descending: increased tension in the hip extensors occurs.Back to article page