A big day for me - I'm back on the bike - albeit on my my Zwift Hub, smart trainer. I had total hip replacement (left) on July 14th, went back to work on Monday. I had planned to ride a three mile loop tonight and ended up doing it twice. The new trainer is "smart" and applies resistance going up/downhills. I was sweating like mad and chose a course with very small hills. Standing up is uncomfortable, so I'll need to work that out before venturing back out on my rural roads and nearby C&O Canal. But, it was great to get sweaty again. Excuse my non-cool white t-shirt! I even beat my "ghost pace rider" on the 2nd loop, kicked his ass in fact!