Men tend to walk slower when walking with romantic partners

October 23, 2013

When walking with female romantic partners, males tend to slow down by about 7%, according to new research published Oct 23 in the open-access journal PLOS ONE, by Cara Wall-Scheffler and colleagues at Seattle Pacific University.

People have an optimal walking speed that minimizes energy expenditure. This optimal speed varies with physical features like mass and lower limb length, and therefore males in any given population tend to have faster optimal walking speeds than females. Given this difference, it is not clear what happens in walking groups of mixed-sex. In order to walk together, someone in the pair will need to pay the energetic cost of deviating from his or her .

The authors here examined individuals' speed choices when they walked around a track alone, with a significant other (with and without holding hands), and with friends of the same and opposite sex. They found that walk at a significantly slower pace to match the females' paces, only when the female is their romantic partner. The paces of friends of either same or mixed sex together did not significantly change, suggesting that significant pace adjustments occur only for .

These findings could have implications for both mobility and reproductive strategies of groups, and could help interpret fossil footprint trails and hunter gatherer strategies.

Explore further: Optimum running speed is stride toward understanding human body form

More information: Wagnild J, Wall-Scheffler CM (2013) Energetic Consequences of Human Sociality: Walking Speed Choices among Friendly Dyads. PLoS ONE 8(10): e76576. DOI: 10.1371/journal.pone.0076576

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