Abstract
This research aimed to develop an android-based speed test instrument called SprintA. SprintA can measure acceleration, length, and the number of steps. This research is development research. The research phase consists of a feasibility test and trial. Participants in the feasibility test consisted of 3 athletic trainers and 1 electrical doctor lecturer. To increase the feasibility, the researcher enlisted the help of four athletic trainers who were not subject to expert judgment. Meanwhile, 15 sprint athletes competed in the trial. The trial was conducted by comparing sprintA with a stopwatch. The root means square error correlation value is a data analysis technique. The results of four experts' evaluations yielded an average score of 86.08, placing them in the "very good" category. In the usability aspect, the results of the assessment from 4 experts show the product helps athletes and coaches to increase scores (33.4%); the product has a real team nature (13.3%); the product can know the speed, acceleration, number of steps (20%); the product is effective for measuring sprints by percentage (20%); and other answers (13.3%). The scores on the safety aspect are the product safe and comfortable to set up (26.70%), the product is easy to use (40%), the product does not interfere with exercise (20%), and other answers (20%). Furthermore, the test results of the sprintA vs. stopwatch correlation score found a value of 0.99 and an RMSE score of 0.47. In conclusion, SprintA is feasible to measure speed, acceleration, and the number of steps. The comparison test for SprintA vs. stopwatch got an RMSE value that was not much different. The creation of this tool is said to facilitate the evaluation of short-distance running athletes.