You put a lot of stress on your hip flexors when you sprint or kick. Thatâs why athletes, especially runners, soccer players, and martial artists, are especially prone to hip flexor injuries that result in hip flexor pain. Hip flexor pain is usually felt in the upper groin region, where the thigh meets the pelvis. To avoid hip flexor pain, you should pay more attention to these muscles, Dr. Siegrist explains. When you are seated, your knees are bent and your hip muscles are flexed and often tighten up or become shortened.
Walking and bicycling are good exercises for bad knees because they aren't high-impact. If you belong to a gym, the elliptical machine is another good option; the machine has pedals instead of a flat, treadmill-like surface and allows you to simulate running and walking without the impact on the joints.
If your spinning bike is not set up properly you may develop knee problems. Adjusting your bikeâs seat height is a simple way to prevent knee pain. To determine the right seat height, place your feet in the toe cages or clip into the pedals and rotate the pedals until one leg reaches the bottom of the pedal stroke. That leg should have a slight 25 to 35 degree bend in the knee.