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Well, at 76 I DO "give a crap" about fitness. As a former cross country ski racer and bicycle racer I have been staying fit since those days so I could backpack, backcountry and alpine ski at altitudes above 8,000 ft.
My Bowflex and free weights plus hikes in my Las Vegas area mountains with a 30 lb. pack are what keep me going - well plus good genetics. "Ya gotta pick the right parents."
I may be "the exception" but many others could be too if they just get off the couch.
The saying, "I'd rather wear out than rust out." has a lot of meaning for me.
Eric B.
P.S. "What in the world (am I) going to do with the meat from an elk or mulie?" My new answer to multiple trips out with a pack is a TREK Superfly 5 electric bike which I'll be getting in a few months.
E-bikes have recently been permitted on Forest Service, BLM and National Parks lands that permit mountain bikes per an order from the Secretary of the Interior.