Late 40’s here. Been elk hunting since I was a teen. I try to stay fit throughout the year. Strength training major muscle groups through the week (squats/lunges, dumbbell chest press and shoulder press, dumbbell rows, lots of core work for low back and abs). Cardio wise, I make sure to move each day. 30-60 min walks. Weekends with more time, work to get in some longer activity with a pack. Take any chance to get up n the mountains for longer hikes. I will mountain bike with my kids when I can as well. As the summer rolls along, hikes get longer and some backpack trips get out in the mix. For me the key now is to stay fit both strength and cardio wise so I don’t have to worry about ramping anything up.