The purpose of the article is to study the state of cardiovascular system of sportsmen involved in rowing and canoeing, both before and after training. Material et methods: The research has been performed by means of the developed mobile devices that allow non-invasive screening assessment of the potential risk of collapse complications. Results: The article outlines the results of the survey carried out to determine the presence of vagotonic tone with deficient activity supply and abnormal pulse wave that may lead to circulatory collapse in exercise. Conclusion: The technique of pulse wave and vegetative regulation assessment before and after training enables to prevent the circulatory collapse development in stressful physical exertion in sportsmen.
Usanov D.A., Protopopov А.А., SkripalA.V., AveryanovA.P., Kashchavtsev Е.О. State of cardiovascular system during exercise in sportsmen // Saratov Journal of Medical Scientific Research, Vol. 9, Issue 1, 2013, pp. 64-68

The description of investigation of predisposition to potential danger of collapse complications at 429 first-year students during physical training is presented using the analysis of pulse wave form. With the help of developed device the group of students with predisposition to risk of collapse complications during physical activity has been revealed. The results of clinical examination have confirmed the predisposition of the given group to risk of collapse complications
Usanov D.A., Protopopov А.А., Skripal A.M, Averyanov A.P., Repin V.F., Rytik A.P., Vagarin A.Yu., Kuznetsov M.A., Petrova M.G. Diagnostics of evolution of risk collapse complications at student group with anomalous cardiovascular reaction // Saratov Journal of Medical Scientific Research, Vol. 6, Issue 3, 2010, pp. 615-619