These ideas can help with teaching Energy Systems.

Phosphagen recovery

Looking at Phosphogen recovery and its implications for training. Scenario three groups of students. One student in each group completes 10 x 10-second sprints, depending on which group they are they get between 10 and 180 seconds recovery. The best way I have found is to draw out of a hat recovery periods 10 seconds 30 seconds 180 seconds. You can look at heart rate to get data, distance run each rep etc