Drew currently walks two miles every day after school but wants to take his workout to the next level. which of these changes would you suggest he make to his routine to increase his stamina?

Currently, Drew walks two miles every day every after school, wanting to take changes in his daily routine by taking the workout to the next level, it is therefore suggested that he alternate running and walking. By doing so, he will be able to increase his stamina. This can be done in such a way, for example, he walks 1 mile and run for another.

Anxiety, stress, or something like that