Adventure III .... Riding my Bike on my Trainer

Today was the first time, since my knee (meniscus clean-up) surgery (on 6-11), that included a ride on my bike (a carbon-fiber Scott, 30-speed (a hub of 10 gears on the rear derailleur and 3 larger, drive-gears) on a trainer, instead of riding on my recumbent bike. I pedaled so vigorously (22 minutes) that I worked up quite a sweat. This (sweating) was a bit novel, not having worked up a sweat in more than a year.