Aim. The aim of this research is to develop objective quantitative criteria to characterize and assess the leading components of a low start in athletic sprint. Materials and Methods. The experiment involved 14 athletes of different qualification, age, height and weight. We registered 42 starts at 30 m. maximum sprint.Using original computer-based testing methodology with a three-dimensional force platform and specialized software, we distinguished 11 strength and time partials, 8 integral strength impulses and 7 complex indicators, characterizing the third step. Results. It was found that among the achievements of a 30 m. and 5 m. max sprint from a low start there is r = 0.96. The Parameter “Effort Time to Maximum Power Value” has a value of r = 0.83. The integral “Impulse of the force in front support” is equal r = –0.40 and the complex “Time criteria - K6” equals 0.81. Conclusions. It is found that a significant criterion for the evaluation of sport technique is the “Time for the whole process of force impact during the third step of the start” while the “average strength during the entire supporting phase of the third step after the start” is notinformative for a micro modeling. For the level of sports performance, the shortest moment of ejection is positive compared to a depreciation phase. Conclusions set out top-level benchmarks criteria and models and outline an objective basis for optimizing performance in athletic sprint.