(Original post by Crimson Black)
So you can't go swimming, and you don't want to run... I'd suggest rowing. After swimming, I find this works the most muscles.
Join a gym and use one, or 'acquire' (buy, beg, steal, borrow?) a machine somehow. You should try and find a swimming pool again though.
If you're looking to get fit in the comfort of your own home, I'd suggest burpees (done correctly
, squat thrusts, dynamic squats (ie. you jump 180 degrees back and forth whilst doing them), dorsal raises (helps back musculature), crunches, press-ups (w/ or w/o claps, salutes)...
Do them in a routine - ie. do all of these things (alternating between upper and lower body exercises eg. squat thrusts, then press-ups, then crunches, then burpees etc etc), and don't take a break in between each set(or, if you must, about 5 seconds)! Start with doing about 20 each, although that depends largely on your fitness I suppose. They're better for building up muscle and making them burn more energy daily in the long run rather than a conventional cardio workout - so if you want to lose weight, stick to rowing, swimming etc. Although, you really should give running a chance! You get used to it.