The first and third days of strength training are weight training circuits. The circuit training helps acclimate the players to a high volume of work and is specific to the requirements of pre-season practice. Work and Rest times are monitored during the circuit, which lasts no more than a total of 30 minutes. The second day of strength training focuses on strength and hypertrophy as opposed to endurance. Core training, or abdominal training, occurs on the same days as strength training.
Core training is an evolving area of research.
I use his methods for abdominal training. I suggest that you try it out. Conditioning is extremely important during this training period. Figure 1 shows that conditioning takes place five days a week. Monday emphasizes change of direction.