New research published in the open-access journal PLOS ONE says that when walking with female romantic partners, males tend to slow down by about 7%. The research was conducted 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 optimal speed. 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 males 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 walking together did not significantly change, suggesting that significant pace adjustments occur only for romantic partners. These findings could have implications for both mobility and reproductive strategies of groups, and could help interpret fossil footprint trails and hunter gatherer strategies. Source: Eurekalert << China-Made Treats Probed After Instances of Sick Pets in US Saturated Fat may Actually be Good for the Heart >> Recommended Reading Walking As An Exercise People walk for many reasons ranging from pleasure to mental relaxation, finding solitude or for exercise. READ MORE Sleep Disorder: Sleepwalking Sleepwalking or "Somnambulism," is a type of parasomnia and has medico-legal implications READ MORE Walking for Fitness and Weight Loss A few extra steps a day are enough to keep you fit. READ MORE Body Types and Befitting Workouts Workout and diet which is well suited for a pear shaped body. READ MORE Who Else Wants to Know How Walking Helps Heart and Brain? Walking early morning would improve your health as it helps heart and brain to function properly. Find more about its benefits for your body. READ MORE Most Popular on Medindia Blood - Sugar Chart Calculate Ideal Weight for Infants Noscaphene (Noscapine) More News on: Body Types and Befitting WorkoutsWalking for Fitness and Weight LossWalking As An ExerciseWho Else Wants to Know How Walking Helps Heart and Brain?