The level of athletic performances is commonly rated with the International Association of Athletics
Federations (IAAF) score value. For running events, this scoring system proved to be strongly based on the total power
output corresponding to a given performance. The aim of this study was to develop a semi-objective rating system for
competitors in 800-1500m races based on the correlation between IAAF scores and anthropometric parameters. The study
was carried out in top Ethiopian athletes, with IAAF score ranging 976-1113 for men and 1008-1093 for women.
Significant regressions with negative slope were found in both sexes by plotting individual IAAF score vs sum of skinfold
(biceps, triceps, subscapular, and suprailiac) as well as vs BMI/sum of skinfold ratio. We also related the increase in heart
rate (HR) to the mechanical power output during an exercise test on a variable inclination treadmill through an
exponential regression of the type Y=Y0+A*exp(B*X), where Y0 represents the asymptotic value of HR at the highest
work load. Significant relationships with negative slope were found by plotting IAAF score vs Y0 in both sexes indicating
that a lower cardiac burden at any mechanical load corresponds to a higher athletic fitness.