Sex differences in human running performance: smaller gaps at shorter distances?

Area of Science:

• Sports Science
• Human Physiology
• Athletic Performance Analysis

Background:

• Human running performance is significantly stratified by sex, impacting athletic classification and regulation.
• The widely cited 10%-12% sex performance difference in running is not well-established across all event distances.
• Sprint performance is influenced by factors like ground force and body mass, differing from endurance performance determinants.

Purpose of the Study:

• To investigate whether the sex difference in running performance varies with sprint event distance.
• To quantify sex performance differences across various standard racing distances.
• To compare sprint sex differences with those in longer running events.

Main Methods:

• Analyzed race times of elite male and female runners (n=40 each) over 15 years (2003-2018) at nine standard distances (60m-10,000m).
• Examined 10-meter segment times of male (n=14) and female (n=12) athletes in World Championship 100m finals.
• Calculated between-sex performance time differences for each distance and segment.

Main Results:

• Sex performance time differences increased with sprint event distance, ranging from 8.6% (60m) to 11.7% (400m).
• A relatively constant mean difference of 12.4% ± 0.3% was observed for longer events (800m-10,000m).
• Within the 100m dash, sex differences in 10m segment times widened from 5.6% to 14.2% progressively through the race.

Conclusions:

• Sex differences in sprint running performance are not constant and increase with both race and running distance.
• The findings challenge the prevailing view of a consistent 10%-12% sex performance difference across all running event types.
• Variable sprint margins reflect differing biomechanical advantages related to acceleration and sustained speed between sexes.