When I ride (not driving) in a car, I feel draining. This has made me homebound. I have to ask my wife to go slow, about 30-35 miles an hour, and I go less than 5 miles from home, about a couple of times a month. Any acceleration worsens my draining. Interestingly, flying does not do this. Any of you have any ideas on how to deal with this, thanks in advance!