What type of sprinting should i do to decrease my 40 yard time?

C

Chad

New member
I am a DB and I am getting ready for a spring practice next year and the last time I checked my 40 it was 5.5 I was working out a lot since then to decrease it and now I was thinking of going to a spring practice as a walk on and I cant think of any kind of conditioning and sprinting to help with my speed
 
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