Plyometric exercises are challenging and ideal if you're short on time. You can design an effective 15- to 20-minute, high-intensity workout with a combination of such exercises as jumping jacks, squat jumps, lunge jumps, squat-thrust jumps, mountain climbers and high knees. For a boot camp-style training session, perform each exercise for one minute with a 30-second recovery between exercises. Rest for three minutes after completing the first set, and then complete two more sets.
The following is an excellent routine!
https://search.yahoo.com/yhs/search?p=Plyometric+exercises+at+home+youtube&ei=UTF-8&hspart=mozilla&hsimp=yhs-001
Get the OK from your doctor!!!
Look into HIIT training. it can be done in a short time. Even 20 minutes.
What about jump rope. This doesn't need anything except a rope and shoes.