Sitting for long periods can cause your hip flexors to shorten up and become tight. This can lead to problems with posture and back pain, as well as foot, ankle and knee injuries (1). Hip flexor muscles attach the hip joints to the top of the femur and the inside of the knee, allowing flexibility …

Sitting for long periods can cause your hip flexors to shorten up and become tight. This can lead to problems with posture and back pain, as well as foot, ankle and knee injuries (1). Hip flexor muscles attach the hip joints to the top of the femur and the inside of the knee, allowing flexibility …

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