Question

lexi is going to begin interval training with running for four weeks. she has determined she is ready to increase her fitness levels with vigorous exercise. how can she apply the overload principle to her running routine? add two intervals of walking for as long as possible add two 30 - second intervals of sprinting add two intervals of a moderate tempo run add two extra active recovery intervals

Explanation:

The Overload Principle involves increasing the intensity of exercise. Sprinting is a high - intensity activity compared to the other options. Adding two 30 - second intervals of sprinting will increase the intensity of her running routine.

Answer:

add two 30 - second intervals of sprinting