I believe this was the paper on which the NYT article was based: http://journals.lww.com/acsm-healthfitness/Fulltext/2013/05000/HIGH_INTENSITY_CIRCUIT_TRAINING

I believe this was the paper on which the NYT article was based: http://journals.lww.com/acsm-healthfitness/Fulltext/2013/05000/HIGH_INTENSITY_CIRCUIT_TRAINING_USING_BODY_WEIGHT_.5.aspx http://journals.lww.com/acsm-healthfitness/Fulltext/2013/050...