i'm like that too don't worry so i'm anal as when designing programs...i can take a week to make up my own because of it!
what i used to do before i smashed my camera was video the sprint, put that on youtube, then revideo the youtube video with a phone timer next to it (they have 100th of a sec on the iphone timers like 1.05.12mins etc) but in the same video...then i'd upload again to youtube and you can pause the video where your first movement occurs, take the time down then pause again once you cross the finish line again taking the time down and getting your set time
sounds like a long process but it's not and is "pretty" accurate
here's 1:
another way is if you have distances measured out like a sprint track then test over a specific distance and count eh amount of steps you take to do the distance..."usually" this will result in greater force production and the use of less steps to cover the same distance but not always
what i used to do before i smashed my camera was video the sprint, put that on youtube, then revideo the youtube video with a phone timer next to it (they have 100th of a sec on the iphone timers like 1.05.12mins etc) but in the same video...then i'd upload again to youtube and you can pause the video where your first movement occurs, take the time down then pause again once you cross the finish line again taking the time down and getting your set time
sounds like a long process but it's not and is "pretty" accurate
here's 1:
another way is if you have distances measured out like a sprint track then test over a specific distance and count eh amount of steps you take to do the distance..."usually" this will result in greater force production and the use of less steps to cover the same distance but not always