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Purposeof the study isto develop and experimentally justify the design of the training process of ski jumpers, whichis based on the control of body composition and control of physical fitness.Materials & methods: the study involved qualified athletes (n=47, 20 young women and 27 young men aged 181.56 years). The experiment took place during 2019 on the basis of the Federal training center for winter sports "snowflake" named after A. A. Danilova (Tchaikovsky city, Russia). Bioelectrical impedance analysis was performed on the basis of a hardware analyzer of body composition "InBody 720". Functional diagnostics was carried out with the use of medical diagnostic software and hardware complex "Esteck system complex". Pedagogical testing was carried out based on 8 tests. To assess the static balance the following tests were used: the balance of the frontal and sagittal position of the body on the board for the duration. Flexibility was assessed by exercises: tilt forward, determination of the angle of flexion of the ankle. Assessment of motor coordination abilities was carried out to assess coordination abilities in rectilinear motion ("barriers") and in curvilinear motion ("eight"). In order to monitor the speed and strength endurance, jumping over the bench and exercise "plank"were used. Determining the speed and power indicators: long andtriplelong jumpwere evaluated. The results were recorded in a specially designed individual athlete card.Results: experimental means of control of body composition within the season allowed to reach the reference values of the component composition of the body and increase the level of special physical training and improveathletic performance. Athletes showed a remarkable increase in the results of motor coordination and speed-power abilities, static balance, speed and strength endurance. Among young men significant differences were revealed in control exercises such as: balance sagittal body position on the board, exercise "eight", long jump, exercise "plank". Amongyoung women, significant changes were obtained in control exercises: balance of the frontal position of the body on the board, jumping over the bench, exercise "plank" with emphasis on the forearm. Conclusion: the training of qualified ski jumpers should be carried out taking into account the body composition and physical fitness of the athlete. The main means of optimizing the training process of ski jumpers should be an individual athlete's card. On the basis of data of the individual card of the athlete the strategy of training process is developed.