"New research presented at the American College of Sports Medicine's 2004 meeting found that, over a 2-month period, men who did one set of upper-body weight-lifting exercises had equal strength gains (21 percent) and better fat loss (19 percent versus 10 percent) than those who did three sets." "How can you gain strength and lose more fat with a third of the effort? The British researchers believe that the tiring three-set workout may cause exercisers to overcompensate with calories at their next meal." http://www.prevention.com/article/0,5778,s1-2-69-242-4720-1,00.html? Thought this was interesting.