Most of you know what I'm talking about....but for the benefit of those who don't....
The actual measuring stick for speed (particularly in football from High School and up is 40 yards. It used to be...they timed players at longer distances...but since most long runs are not usually over 40 yards it provides a good distance for judging a guy's speed...especially since short distances require a good start.
So when a guy says he runs a 4.5 ...he is saying...."I run the 40 in 4.5 seconds." In the NFL...for instance....a guy who runs 4.5 and under will be either a running back or receiver. Most "wide receivers in the NFL will easily run a 4.5 and many run under that. However there are a few running backs who run faster. One of the fastest guys in the league is Gary Johnson who HAS run a 4.2 (blazing fast) Deon Sanders (a former Dallas Cowboy and 49er cornerback has run it that fast) The Dallas Cowboys found out all about Bryce Brown's speed last night in the game with Philadelphia. (he is a running back who runs a 4.3)
It is ALL about how strong of a start one gets. In high school i had a coach who told me....if I didn't run a 4.6 i was not going to be the starting halfback the following year. So i tied a rope to a truck tire....and around my waist and ran/practiced all summer in the Texas heat working on my start and running further than 40 yards so that i could maintain speed all the way through. It worked.
Like I said....MANY of you know....I just wanted to comment on it~