The line graph below illustrates the USA marathon records by age and gender in hours.
Overall, it can be seen that the indications of male gender had perceptible priority over females no matter at what age they were. In addition, records belong to people aged from 10 to 60.
A more detailed look at the graph shows that at the age of 10 both male and female genders almost had the same indications(3 hours). However, the age of 20 was marked by a significant change, because 2.1 hours record belonged to male, whereas female gender enjoyed 2.3 hours respectively. By the age of 30 imperceivable change was observed(male-2.05 hours, female-2.25 hours). Gradually, indications started to fall dramatically and by the age 60 the indications of women remained 3.15 hours, while men's records were higher(2.45 hours).
To sum up all, the graph rose gradually till the age of 40 and fell dramatically till 60. Apogee was observed among people aged 30.