Holy crap. That kindda stuff makes me mad. If the OP did 5 or 10, she would have been appropriately challenged and would have had a great workout. But being pushed 'past the pain' inflicted a huge damage to her body. The exercise is fine, it's the concept of overtraining that is not. It seems to have originally come from the desire to get to the gym for min amount of time and martyr oneself to avoid doing it regularly and with joy or something. Stuff like Insanity and Biggest Looser promote this unhealthy outlook on fitness. Shame on the PT!