51, and right now in the middle of my M.E. / CFS being on a serious downswing. If I can find a doctor who can tell me WHICH ONE I've got exactly, I'll tie it down for you. It combines well with my osteo and rheumatoid arthritis, but at least the clinical depression hasn't come out to play for a while.
I'm seriously lucky in one respect. about 18 months ago my mother told me that if I didn't take her dog, he was being put down. So I get gently woken in the mornings with a nosey nudge, I have regular playtimes through the day that force activity, and when I'm feeling seriously rough I have a sympathetic head on my lap. Right now walking any distance is an issue - but I'm on the up, god help me when I start walking him again, which I'm hoping will be next week. Tiring him out with games of fetch out the back is all well and good, we both need some mileage on the clocks now.
I've had to buy him a new harness, the little bugger has grown some. Well over 60kgs now I reckon, and with a 40 inch chest. Maybe a saddle would have been a better bet.
But - do what you can, don't push too hard or you'll mess yourself up for tomorrow, and try to stay positive. And if you can't stay positive, talk about it. Don't go into a downward spiral alone.