How to test player movement speed in 1.8?

I am wondering if there is a better way to track, or test, how fast a player is going, then activate command off that. So far I have: /scoreboard objective add Sprint stat.WalkOneCm Then, every tick I have that set to zero. /scoreboard players set @p Sprint 0 Then, after it resets 5 times, It tests to see if the players movement speed if in between 150 and 200 WalkOneCm score per tick. If true, then you get a speed boost. However, sometimes it fails, and tests when its at 50 or so. Is there a better measurement?

I found a possible answer, but I haven't got it to work yet:

First, you build a clock (with a bit longer delay).

Then, you let a set of Command blocks be triggered at once. Theese CMD blocks should summon a circle of Armour Stands with different names around the Player.
Then, after a small delay, a CMD Block row tests the Player distance from each ArmorStand (by name). If any Player-ArmorStand distance is smaller then, let's say, 1 block, another command is executed, eg.:

/execute @e[name=ArmorStand1] ~ ~ ~ execute @a[r=1] say @p is sprinting

If summoned in this way, it gives a total of 24 CMD blocks:

_ ■ ■ ■ _
■ _ _ _ ■
■ _ P _ ■
■ _ _ _ ■
_ ■ ■ ■ _

P for Player, ■ for ArmorStand, _ for nothing.