Thank you! I've seen it done and always been impressed. Although my orthopedist allows any kind of walking, it has not recently been my friend: I've had three knee replacements, one hip replacement, and back and shoulder surgeries. The most I've been able to walk without a cane is about 1/2 mile at a slow pace, and it doesn't look or feel very natural. My go-tos are a step machine and a stationary bike. I'm asking in this forum whether my current plan is adequate or too much for avoiding the worst fatigue but not exhausting myself before getting started daily.