All other running (2017)
Enter best time ever:
Hours Minutes Seconds
Age at best time ever


These calculations use the updated running age factors in Fair and Kaplan (2017). See 2017 Updated Age Factors. They are based on world single age records for men compiled by ARRS: World Single Age Records. Four road races were pooled---5km, 10km, half marathon, marathon---along with two outdoor track events---5000 meters and 10000 meters. The data are as of June 2, 2017. As with the 2007 age factors, these age factors should be used for all running events except 100, 200, and 400 meters. They can also be used for women. However, since the swimming results in Fair (2007) suggest that women slow down a little faster than men, these age factors may be a little too low for women.

The results in Fair and Kaplan (2017) begin with age 40 rather than age 35 and end with age 95 rather than age 100. The following age factors thus begin with 40 and end with 95, where the factor for age 40 is 1.0000. This means that any decline between ages 35 and 40 is not accounted for. It is just assumed that decline begins at age 40. There is probably some decline between 35 and 40, but it is quite modest, possibly about one percent total over the five-year period. Although this possible decline is ignored here, the user can if desired just increase each factor by about one percent to get factors with a starting age of 35. The age factors are:


AgeFactorAgeFactorAgeFactor
40 1.0000 61 1.2038 82 1.5168
41 1.0089 62 1.2145 83 1.5672
42 1.0178 63 1.2253 84 1.6275
43 1.0269 64 1.2362 85 1.6986
44 1.0360 65 1.2471 86 1.7818
45 1.0452 66 1.2582 87 1.8784
46 1.0544 67 1.2694 88 1.9902
47 1.0638 68 1.2806 89 2.1193
48 1.0732 69 1.2920 90 2.2681
49 1.0828 70 1.3035 91 2.4396
50 1.0924 71 1.3150 92 2.6372
51 1.1021 72 1.3267 93 2.8652
52 1.1118 73 1.3385 94 3.1286
53 1.1217 74 1.3503 95 3.4334
54 1.1316 75 1.3623
55 1.1417 76 1.3744
56 1.1518 77 1.3866
57 1.1620 78 1.3991
58 1.1724 79 1.4170
59 1.1828 80 1.4422
60 1.1932 81 1.4753