I pushed myself a little bit at least once a week and I noticed I felt worse immediately after but the next time I went out, it was easier to do. This "pushing" isn't the amount of pushing you do when healthy... it's minor but you will feel it. Don't push it all the time though. You'll know when it's too much and you will feel awful and crazy. : ) Once a week was enough for me. More than that and I would feel aggitated.