Some controversies never seem to go away.
The fitness community has long debated whether there's an additional benefit to doing the second and third set while lifting weights. These individuals had been doing one set using a nine-exercise training circuit for at least a year. Half of this group continued to perform one set and half began to perform three sets of 8-12 reps to muscular failure three times a week for thirteen weeks using the same circuit. They also measured body fat percentage. The results showed that both groups significantly improved muscular endurance and strength.