I got a slow stet this year due to back strain. Picking up running and biking pace to get muscles burning. But everything is relative. I am 53 now and can't do 6:30 minute miles. Am running 20 miles per week. My calf muscles tighten if I do more. No more weights due to persistent tendinitis, but am shooting bow 3 days per week out to 60 yards with good accuracy. Just 9 weeks to elk hunt.