Frackal said:
Repping that sort of weight puts your body into an entirely different metabolic state....its hard to explain until you've experienced it, but you're basically dazed and out of it for a good 30 min and then once your adrenalin drops you're dead tired...I love them, superb cardiovascular work
Heck, I feel better now. I'm not the only one that gets wasted from doing high reps with moderately heavy weight. I can't go real heavy because of injuries, those 20 rep sets kick my butt, but I recover fully after about 15 minutes.