Yeah I overdid it yesterday. Not on the cardio, I only ran on the treadmil for 15 minutes, but on my strength training. The problem was there was this fit little girl next to me on the mats who was just powering through a HUGE long set of strength moves. Situps, bridges, planks, just everything. So I felt the need to push myself. I upped the weights I normally use from 10 lbs to 12.5 lbs. I added in extra exercises. I powerd through roughly twice the session I normally do.
And today I pay for my vanity. Ow.