When I was in my late 50's I arrived at same conclusion. I started experimenting with various tools to estimate my workload, calories burned and the like. I found that walking on a treadmill at 10% grade provided me with greater workload indicators than did running on level ground. As I hate treadmills like most, I only use them in nasty weather when I cannot go outside, the rest of the time I walk outdoors. I use a pack with sandbags added or more resistance as hunting season comes closer. I keep track of my miles and elevation when hiking and compare with previous months and years. I wear high quality shoes, to protect my knees and ankles. All I can say is that it works for me.
Last edited by elkmen1; 03/30/21.
