his paper aimed to determine whether the ABO blood group could exert an impact on endurance running performance in middle-aged recreational athletes.

The findings illustrated that recreational athletes with O blood group displayed better endurance performance compared to those with non-O blood group types.

This finding could yield additional support to the supposed evolutionary advantages of carrying the O blood group.

Reference:

Lippi G, et al. Influence of ABO blood group on sports performance. Annals of Translational Medicine. July 12, 2017.