“…Other studies analyzed the role of the number of training sessions (Zaryski and Smith, 2005), the effect of chronological age (Clemente- Suarez and Nikolaidis, 2017), the contribution of different biomechanical and morphological factors (Hoffman and Fogard, 2011) as well as emotional and personality constructs (Lane and Wilson, 2011), as key performance parameters for ultra-endurance events. Latest studies observed greater performance in ultra-endurance sport events with an appropriated hydration and optimal nutritional status (Peters, 2003;Costa et al, 2014), oral health status and periodontal disease (Needleman et al, 2013(Needleman et al, , 2015Ashley et al, 2015;Frese et al, 2015), higher training intensity and volume (Knechtle et al, 2012), higher pain tolerance (Schutz et al, 2012;Freund et al, 2013) and stress management (Baker et al, 2005;O'Neil and Steyn, 2007). Moreover, a previous study analyzed specific psychological parameters such as the vital commitment, coping with anxiety, self-perception, stress perception and psychological flexibility showing their relationship with athletic performance (Hughes et al, 2003).…”