I'm very pleased with my treadmill workouts. I'm feeling stronger, and my heart rate seems to be adjusting. I've had some soreness on the outside of my right knee the last few runs--probably the IT band, but I've never had issues on the right side before. I thought it might be my shoes (I think they're a tad big), so I used my old shoes today. Still some soreness, but not as much as the last run.