A swimming coach is planning a training program for the team's sprinters. The coach wants to target anaerobic capacity through interval training. Which of the following training protocols would be most suitable for this purpose?
- 6 sets of 30-second maximal effort sprints with 4-minute complete rest periods
- 4 sets of 5-minute intervals at 85% maximum heart rate with 3-minute active recovery periods
- 30 minutes of continuous swimming at 70% maximum heart rate
- 10 sets of 1-minute intervals at 80% maximum heart rate with 1-minute active recovery periods