1.Aghajanyan, N.A. Hardening and a healthy lifestyle / N.A. Aghajanyan, I.V. Radysh. Moscow: RUDN University, 2018–256 p.2.Apanasenko, G.L. The physiological basis of hardening / G.L. Apanasenko // Theory and practice of physical culture. -2020. –No. 5. –pp. 12-17.3.Belov, V.I. Encyclopedia of a healthy lifestyle / V.I. Belov. Moscow: Rus, 2019. 512 p.4.Borisova, N.V. The effect of hardening procedures on the immune system / N.V. Borisova // Issues of sports medicine. –2021. –Vol. 45. –No. 3. –pp. 45-52.5.Vorobyov, R.I. Physical culture and tempering / R.I. Vorobyov. –St. Petersburg: Peter, 2017. –224 p.6.Dubrovsky, V.I. Valeology. Healthy lifestyle / V.I. Dubrovsky. –M.: VLADOS, 2020. –368 p.7.Ilyin, E.P. Psychology of health / E.P. Ilyin. –St. Petersburg: Peter, 2019. –288 p.8.Kovalenko, T.G. Method of hardening the body / T.G. Kovalenko // Healthcare. -2022. –No. 7. –pp. 34-39.9.Popova, S.V. Modern approaches to hardening / S.V. Popova, A.N. Razumov. –M.: Medicine, 2021. –184 p.10.Semenova, E.A. Hardening as a method of preventing colds / E.A. Semenova // Preventive medicine. -2020. –No. 2. –pp. 22-27.