If your team is unable to improve their 40 time, it might be you holding them back. The general wisdom is that you should push down hard on the ground if you want to improve your sprint time, but there is more that you can be doing. For example, exercising your hip flexors properly can make you sprint faster, and that can make all the difference in the game. Consider adding this hip flexor workout to your training regime.
“While pushing down on the ground hard does help your running speed, there is so much more that needs to be considered regarding sprint training.”
Read more: https://athleticquickness.com/football-coaches-faster-40/