Being that it's pro day season, I thought I'd post a link to the National Athletic Testing Systems combine drill page, where they videos, tips and other good information that can help you improve your performance in all of the combine drills, including the 40 yard dash.
Note: click on the underlined words Speed, Strength, and Agility to get to the informaiton.
Warning: If you see something that goes against what your trainer has been teaching you for your pro day, run what you read/see by them before changing up your technique.
Good luck fellas!
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