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Biking (mountain) is my groove. Worth a try if you have some tracks as it does not put pressure on your knees like running.

Used to LOVE mtb.

Unfortunately my knees are busted and I don’t have full range of motion on my right knee. And I’ve broken every toe lol.

You have probably thought about this already, but shorter cranks (150mm or so) might let you avoid bending your knees as much.