I’m pretty sure cardiovascular endurance
The 70.3 refers to the total of distance in miles (113.0KM) covered in the race,consisting of a 1.2-mile (1.9 KM) swim,a 56-mile (90km) bike ride,and a 13.1- mile (21.1 KM) run.each distance of swim,bike,run segments if half the distance of that segment in an ironman triathlon
