“…Female participants were classified into three age groups (<35 years, n = 9; 35–45 years, n = 13; >45 years, n = 10), whereas male participants were classified into eight groups (<30 years, n = 7; 30–35 years, n = 8; 35–40 years, n = 25; 40–45 years, n = 34; 45–50 years, n = 32; 50–55 years, n = 16; 55–60 years, n = 6; >60 years, n = 6). The classification of male participants into age groups was in agreement with typical age groups used in marathon races [13,14]. Female participants were also classified into three performance groups (fast: n = 10, <4:15 h:min; average: n = 11, 4:15–4:45 h:min; slow: n = 11, >4:45 h: min), and male participants into quartile performance groups (Q1, Q2, Q3, and Q4, Q1 being the fastest and Q4 being the slowest) based on their race time in the Athens Classic Marathon 2017.…”