I started exercising for the first time in like 4 years. Just solid 30 minute cardio sessions on an elliptical machine (doesn't cause me knee pain). First time sucked and i was extremely sore afterwards. Second time sucked slightly less, somewhat less sore. Third time (today) wasn't horrible, and I'm... a little tender and a bit tired, but otherwise feel fine? Planning to add leg day on top of cardio in a week or so once I've got a consistent habit built a little more.
Also, its fucking hot out, and my AC cant keep up (combination cheap/crappy AC unit and second/top floor apartment). Its going to be 90 degrees or higher out for the foreseeable future, and its been about 76-80 degrees indoors by the afternoon, stays that way until almost midnight 😭