Sorry to hear about your health issues there, obviously my comments cannot apply to all people, all the time. I have often thought TV must be a godsend for those in a situation where they are housebound/bedbound or otherwise incapacitated, especially if they were an active person prior to the health issues stopping play.
I do neither of your suggested activities, I race. Trackdays are not racing and 'strip action' is not really either in my book.
Before you try to defend drags, I have to tell you that I did Championship drag racing for 12 years so I speak from experience when I say it's poorly run, gives terrible value for money and worst of all, is just plain boring.
Racing gives 2x20 minute sessions of flat-out driving (1 practice, one race) for about £250, with up to 60 other cars at the same time. WE do NOT stop if it rains, or gets dark or the wind blows the wrong way like drag racing does. We go up hills and down, round left and right corners and overtake IN THE CORNERS!!!!!
Anyway, I'll stop now, but you get the idea. Racing is a lot more fun than anything else I can do with my car and shows and the like are just not my bag at all.
Just in case you might be interested, this is the club I race with:
http://www.hscc.org.uk/
Cheers, Martin