Why Interval Training Rocks
Assume that you can run at your fastest possible speed for no more than 1 minute. What interval training allows you to do is take a percentage of that time and repeat it as often as you can.
For instance, one interval training protocol might allow you to run at your maximum speed for 30 seconds and then recover with jogging for 60 seconds. After just 3 of these intervals you would have already surpassed the maximum length of time you could sustain that maximum in one go.
This interval protocol could then be repeated for 10 to 20 minutes (or more) allowing you to run at your maximum speed for at least 4 to 5 minutes. So in just 10 minutes you almost quadruple the amount of time you spend at your maximum running speed. That’s huge!