Keep doing something physical. My friend who is 83, drew a sheep tag after 23 years. Rode horseback 24 miles into the wilderness and killed a 10 year old ram. A month later he got a nice mule deer in Nevada where he drew a tag and last month he and his wife shot 2 whitetails on their property. Next, he and I are going aoudad hunting the end of January and last week we booked a spring brown bear hunt in Alaska. He shows no sign of slowing down so if he can do it at his age, there's hope for the rest of us.