At Hugh's direction, I did 15 minutes on the treadmill at 2% incline and another 10 minutes at 4 mph. Found myself to be challenged but not to over exerted. The recumbent bikes were occupied so I did 20 minutes on the upright bike and found it to be a little more difficult but rewarding. No pool today due to gym closing at 4 pm. Must resolve to get there earlier so I can get in some pool time.