As you get older probably better travel as light as possible, suitcase on wheels, light carry bag.
Keep doing exercise, i know very fit 70 and 80 yos.
I used to walk 8km daily in Pattaya by the beach, bali hai and woods to Pratumnak hill, now cycle 100km 4 days a week and golf 2 days. I do see too many expats just sitting about, usually at Big C Extra