Mike, will be hunting mule deer and elk here in CO, turkey and whitetail in Kansas. My hunting partners are late twenties and late forties, both as fit a an individual can be. That's part of my fitness incentive, I'm 64 6' 202#s and fit. My fitness/workouts are daily 12 mos/yr., not seasonal. To me that is the key, 12 mos./year. Hiking almost daily, going as hard as I can, live at 8,700' most hiking is 8,700 to 9,500'. Love to go uphill, hate coming down. Do mix my the duration and intensity of my hikes. Strength is important to me, pushups and curls work best for me. Cant let my partners down, like to challenge them! Good luck. Mark