Correction: Estimating duration-distance relations in cycle commuting in the general population.

[This corrects the article DOI: 10.1371/journal.pone.0207573.].

There is an error in the ninth, tenth, and eleventh sentence of the Abstract. The correct sentences are: The empirical formula for the distance (D, km) was based on duration (T, hours) · speed (km/hours) · a correction factor from cycle commuter to the general population · age adjustment (A, years). For the males in the general population the formula was: D = T · 20.76 km/h · 0.719 · (1.676–0.01476 · A). For females, the formula was: D = T · 16.14 km/h · 0.763 · (1.604–0.01288 · A).

In the Results, there is an error in the second sentence of the second paragraph. The correct sentence is: For males, the age correction factor was (1.676–0.01476 · A), where A stands for age (years) and, for the females, it was (1.604–0.01288 ·A).

In the Results, there is an error in the second and third sentence of the third paragraph. The correct sentence is: The formula estimating the distance (D, km) based on duration (T, hours) and age (A, years) for males in the population in the age span of 20–65 years was: D = T · 20.76 km/h · 0.719 · (1.676–0.01476 · A), where the factor 0.719 reflects the cycle commuter-to-population effect. For females in the same age span, the formula was: D = T · 16.14 km/h · 0.763 · (1.604–0.01288 · A), where 0.763 reflects the cycle commuter to general population effect.