“…Since they begin to train in childhood and adolescence (Kwon, 2018), when the influence of any effects on the telomere length is most pronounced, both positive and negative (Bersani et al, 2016;Henje Blom et al, 2015), we might assume that the corresponding telomere status is established roughly at that time. Therefore, all the positive things that sport brings to life, like education opportunity, career success, etc., affect telomere length quite strongly, especially when supported by personal qualities necessary for the athlete (Vaughan et al, 2019). At the same time, increase in telomere length was shown in people coping with life stress, which was considered as a protective reaction leading to an increase in telomerase activity, and elongation of telomere length, as a result .…”