I am wondering why elliptical and bike are considered to be low impact and better for people with bad knees. To me, these two seem to be using the knee joints more? Compared to walking or running on a treadmill
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When you’re running, your entire bodyweight lands on one leg at a time, which exerts a lot more force on your knee. If you’re sitting on a seat and just moving your legs without putting your body weight on them, you’re putting a lot less force on your knee.
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