53 this year and the one thing I notice is the second you take your foot off the gas and walking not quite so far or doing a bit less of any thing. Things slide quickly so you got keep pushing. There is a fella on youtube TA Fishing he is getting on a bit yet he sleeps in his car walks miles and fishing some long bloody sessions. Very entertaining fella too and seems nice guy. Then you got charts running around the mountains like a goat and Ray getting up to god knows what ! so that's some thing to aim for. The old saying use it or lose it is basically true