help! none cardio or standing exercises

ifiwasurvampire

hi, ive been a member of mfp for a few years. i did great lost over 50 pounds, then suddenly became ill. Due to this issue i can no longer walk, or cycle like i used to. ive gained 40 pounds back. i need exercises that do not involve standing longer than 5-10 minutes and do not involve cardio( i have tachy and sinus tachy and am on a beta blocker to keep hr low).i have profound vasovagal syncope, im trying to avoid fainting while exercising. I would love to get back into a routine again. Thanks!