TABLE 3.

Marathon completion time, runner performance, gender and age across circadian preference.

Characteristic	Definitely morning	Morning > evening	Evening > morning	Definitely evening
Sample size (N)	316	253	242	125
Marathon completion time (min)	244 ± 53.6	251 ± 49.9	255 ± 53.9	257 ± 53.3
Runner performance (%)
Faster than GFA	27.2	21.7	17.4	15.2
Slower than GFA	72.8	78.3	82.6	84.8
Gender (%)
Male	63.0	62.1	69.4	64.0
Female	37.0	37.9	30.6	36.0
Age group—marathon divisions (%)
18–39 years	58.5	70.4	68.6	73.6
40–44 years	17.1	12.7	16.9	15.2
45–49 years	14.6	9.88	7.44	4.8
50–54 years	6.33	5.93	4.55	4.0
55–59 years	1.9	0.79	1.65	1.6
60–64 years	1.58	0.4	0.83	0.8
Age group—statistical analyses (%)
Young adults (18–39 years)	58.5	70.4	68.6	73.6
Middle‐aged adults (40–64 years)	41.5	29.6	31.4	26.4

Sample size, marathon completion time, runner performance based on GFA qualifying time, gender, age group based on marathon divisions, and age group based on the dichotomized age variable used for statistical analyses across the circadian preference groups: Definitely morning, Morning > Evening, Evening > Morning, and Definitely evening. Sample size is presented as counts (n), with marathon completion time provided as means ± standard deviation, and all other characteristics described as percentage within a circadian preference group.

GFA, Good For Age.