quote: At 52, there are not to many good "climbing" years left!"
LHP, a lot of that can be up to you. My wife and I are both 64 and we did several walking tours, including a "Cloud Forest Nature Hike" on the Big Island at Kona. For several hours we were hiking up or down over rough and slippery terrain.
But we eat sensibly, never use the elevators on ships, and walk at least thrree miles every day. We enjoy the outdoors too much to let ourselves go.