When my husband was on dialysis, we played games. Nintendo, Phase 10, etc. We liked to play Tetris a lot, and Phase 10 (card game). He often did not have the energy to go walking, and by the time his transplant came around, he should have been in a wheelchair, so walks that were once taken were no longer an option. We are both competetive, so Tetris was a good avenue for us. It satified the need to compete, yet gave us quality time together. As far as your need to ride your bike, have you tried to explain that when you are on your bike, that is when your problems, ie. stress, leave even for a short time? I am fortunate that my husband understood this about my exercise (I was not riding at the time, but was exercising). I tell people that the reason that I do not have to take purple happy pills, is that I exercise.