Figure 4
From: Sex-related differences and age of peak performance in breaststroke versus freestyle swimming
Swimming speed at national level of women (Panels A, C, E) and men (Panels B, D, F) breaststroke (grey, filled circle) and freestyle (empty circle) swimmers between 2006 and 2010 per 2-year age group and race distance for athletes between 10 and 29 years for 50 m (Panel A, B), 100 m (Panel C, D), and 200 m (Panel E, F). Arrow denotes the age group with the numeric fastest swimming speed. Age groups with no significant difference in swimming speed are indicated by a rectangle and marked with “NS”. Mean ± SD.