Precision of calories countery

I used this app for make the practical test of my degree thesis (ive got a bachelor degree in sport science) and i check some problems that depends on the gps tech i think. But i solve this problem using the science: in the physiology lab i use a metabolic counter during a walking calibration, and i found a gps measuring accurancy in calories counting of 92% at a velocity of 5 (Km/h) and as you know is not a problem for who is walking but that is a problem for coach (also like me) that are training athletes for a qualifing or race lap because now athletes win on hundredth of a second and a 0.8 seconds performance error is too much as i show. For who want ive also got excel chart of records. I think that theres an operation algorithm of the app that can be corrected and this app will also be used for professional sports training as an accourate sport tool with all of the previous benefit.

sirio.lombardi about iRunner Run & Jog Tracker, v7.63