SUMMARY
In the article the purpose, aim, features and capabilities of the stepper trainer simulator (STS) in professional preparation of future physical culture teachers are highlighted. STS is marked as a modern educational trainer device, developed for the purpose of professional preparation process improvement of future physical education teachers and fitness trainers. The functions of stepper trainer simulator (STS) are grounded: educational, developing, stimulant, upbringing, organizational, integrational. Attention is paid to educational function, which focuses on possibility to teach students to work with the modern technical means of information transfer, to form the ability for independent creative activity, to adapt to realization of distance education model; the possibility of theoretical and practical study of health-improving aerobics basic steps.