Mr. Pilates knew about warming up before stretching. The One Hundred is highly effective at warming you up, pumping the organs, increasing blood flow, bringing in oxygen and ridding the body of the byproducts of ventilation. Think of it as house cleaning for the lungs. If you are ever cold in any circumstance, try the One Hundred breathing to warm you up. I once did it when I was on a raft trip for over an hour! Otherwise my legs would shake too much to row.