Question

When performing wind sprint activities, you should _____. keep one foot on the floor perform very short segments of high intensity activity work above your target heart rate always run during the sprint

Answer 1

Since someone would be performing wind sprint activities, it is guaranteed when performing any activity is to get better overtime so I would say to "work above your target heart rate" 

Answer 2

The Correct Answer is perform very short segments of high intensity activity .

Hope it helps~ :)