The pain is always the next day or the day after, not during, so it's more a reminder that I worked really hard. I tore a hamstring once at (get this) Curves, where it's just about impossible to do anything wrong. (Seriously, an 80-year-old was working out with me that night. "All I have to do is step up on one of these platforms, and my heart rate is already in the target zone, let alone moving" Then I stepped off the platform and injured myself, while she was going strong.) I remember that pain very well, and while the second and third days were the worst, I still felt real pain when it happened day. I'm not feeling any pain when I do this, usually just a pleasant "I pushed myself" ache the day or two after. I think I must have already had tired muscles by the time I started, because of the cycling, so I felt it more.