I was recently told that I either have a severe case of tendinidous or I tore a tendon in my foot. I've been given orders to stay off my foot for 4-6 weeks.. I'm going crazy I asked if I could bike or swim, but I'm not supposed to put pressure on my foot so I can't bike and I am not supposed to point my toes so swimming is out of the picture. I'm also supposed to not walk whenever possible. I was training for my first half marathon which doesn't look like I will be able to participate in. Is their any cardio that I can do? I don't do well sitting and I'm going nuts.