Stefan Kolimechkov, PhD

United Kingdom

Professional affiliation: STK Sport, London, United Kingdom
Peer-reviewed Articles:
13. Miteva, S., Yanev, I., Kolimechkov, S., Petrov, L., Mladenov, L., Georgieva, V., & Somlev, P. (2020). Nutrition and body composition of elite rhythmic gymnasts from Bulgaria. International Journal of Sports Science & Coaching, 15(1), 108–116.
12. Penov, R., Petrov, L., Kolimechkov, S. (2020). Changes in heart rate and blood lactate concentration during karate kata competition. Pedagogy of physical culture and sports (Pedagogics, psychology, medical-biological problems of physical training and sports), 24(3):137-142.
11. Neykov, S., Bachev, V., Petrov, L., Alexandrova, A., Andonov, S., & Kolimechkov, S. (2019). Application of hypoxicators in the rowers’ training. Pedagogics, Psychology, Medical-Biological Problems of Physical Training and Sports, 23(5), 239-245. DOI: 10.15561/18189172.2019.0505
10. Kolimechkov, S., Yanev, I., Kiuchukov, I., Petrov, L., Alexandrova, A., Zaykova, D., & Stoimenov, E. (2019). Nutritional status and body composition of young artistic gymnasts from Bulgaria. Journal of Applied Sports Sciences, 1, 39-52.
9. Kiuchukov, I., Yanev, I., Petrov, L., Kolimechkov, S., Alexandrova, A., Zaykova, D., & Stoimenov, E. (2019). Impact of gymnastics training on the health-related physical fitness of young female and male artistic gymnasts. Science of Gymnastics Journal, 11(2), 175 – 187.
8. Alexandrova, A., Petrov, L., Makaveev, R., Tsvetanova, E., Georgieva, A. & Kolimechkov, S. (2019). Erythrocyte Oxidative Status after Maximal Aerobic Test in Wrestlers. Human. Sport. Medicine, 19(1), 15-21. DOI: 10.14529/hsm190102.
7. Kolimechkov, S., Petrov, L., & Alexandrova, A. (2019). Alpha-fit test battery norms for children and adolescents from 5 to 18 years of age obtained by a linear interpolation of existing European physical fitness references. European Journal of Physical Education and Sport Science, 5(4), 1-14.
6. Petrov, L., Penov, R., Kolimechkov, S. & Alexandrova, A. (2018). Physiological and biochemical changes after a programmed kumite in male Shotokan karate practitioners. Archives of Budo Science of Martial Arts and Extreme Sports, 14, 171 – 178.
5. Alexandrova, A., Penov, R., Petrov, L., Cholakov, K., & Kolimechkov, S. (2018). Competitive bout model as a tool for estimation of female karateka specific endurance. European Journal of Physical Education and Sport Science, 4(9), 30-41.
4. Kolimechkov, S., Petrov, L., Alexandrova, A., & Cholakov, K. (2018). BeepShuttle Junior: Software for the Administration of the 20m Shuttle Run Test in Children and Adolescents. Journal of Advanced Sport Technology, 1(3), 35-40.
3. Kolimechkov, S. (2017). Physical fitness assessment in children and adolescents: a systematic review. European Journal of Physical Education and Sport Science, 3(4), 65-78.
2. Kolimechkov, S.T., Petrov, L.A., Alexandrova, A.V. & Atanasov, P.S. (2016). Nutrition and physical development assessment of pre-school and primary school children practising artistic gymnastics. African Journal for Physical Activity and Health Sciences, 22(2:2), 565-577.
1. Kolimechkov, S., Petrov, L., Ilinova, B., Alexandrova, A., Andreeva, L. & Atanasov, P. (2013). Assessment of the physical development of pre-school and primary school children practising artistic gymnastics. Journal of Sport Science (‘Спорт и Наука’) 2013, 4, 106-115.

Areas of Interest: My research focuses on assessing physical fitness, physical activity and nutritional diet. I obtained my PhD degree in Physical Education from the Department of Physiology and Biochemistry at the National Sports Academy, Bulgaria in 2018. I am also a Registered Scientist (RSci) in the United Kingdom, as well as the Editor-in-Chief of the European Journal of Physical Education and Sport Science (ISSN 2501 – 1235). My scientific interests are in the Sport and Exercise Science, and include various sub-fields, such as health-related physical fitness, physical activity, nutrition, gymnastics, and physical education.

Brief wrestling biography: I worked in different scientific projects including physiological and biochemical changes in the bodies of elite wrestlers. Recently, my colleagues and I published a study which aimed to determine the changes in the erythrocyte oxidative status of the wrestlers after performing the maximal aerobic test, by registering in erythrocytes the levels of lipid peroxidation (LPO), total glutathione (tGSH) and activities of catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GPx). It can be concluded that in active athletes, predominate erythrocytes that are more resistant to oxidative stress, because of the accelerated hemolysis induced by physical exercise, lead to the elimination of the old and oxidative modified cells.