This study attempted to determine which training set would best stimulate maximum endurance development. The following sets of repetition swimming with an intensity that taxed 100% of VO2max were compared to continuous swimming at the same intensity: 20 x 100 m with 30 sec rest; 20 x 100 m with 60 sec rest; 10 x 200 m with 30 sec rest; and 10 x 200 m with 60 sec rest. The stimulation of maximum aerobic capacity can be achieved by swimming: 10 x 200 m with 60 sec rest at 96% of 400 m pace; 6 x 200 m with 30 sec rest at 96% of 400 m pace; and 20 x 100 m with 15-30 sec rest at 95% of 200 m pace. (The complete Swimming Science Journal no longer is available online as a free web site. The entire SSJ will always be available on compact disk through Sports Science Associates. It continues to be updated with all the elements that were originally included.)