Elderly female ultra-marathoners reduced the gap to male ultra-marathoners in Swiss running races.

61 , although the race distances analyzed by the authors exceeded the ultra-marathon distances analyzed in this paper (45–260 km) a clear trend of decreasing sex difference with increasing race distance was shown.

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According to descriptive statistics, there is a decreasing trend from the age 20 years to age 70 years in the 5, 10 km, and half marathon distances.

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Regarding age, the first chart shows the blue dots corresponding to female, and the red dots to male, and shows an interesting trend changing gradually between 40 and 50 years.

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