Positive effects of regular, moderate-intensity exercise on physical fitness and overall health of humans are well known. Active life and practicing sports have been confirmed to improve cardiovascular (CV) health (Golbidi & Laher, 2012; Joyner & Green, 2009; Lavie et al., 2015), and reduce morbidity and mortality in the general population (Kruk, 2007). One of the proposed mechanisms by which exercise contributes to health benefits is a reduction of basal inflammation (Beavers et al., 2010; Hamer et al., 2012; Pedersen, 2017). However, many extreme sports, including SCUBA (self-contained underwater breathing apparatus) diving, that have an increasing number of new