The scientists found that the hippocampus, a part of the brain responsible for memory and learning, was around 12 percent larger in the fitter youngsters.
This built-in sun shield helped protect them from melanoma, likely making them evolutionarily fitter and capable of passing this useful trait on to new generations.
Research does show that people perspire more as they get fitter because their bodies adapt to dealing with the effort and sweating more helps them keep cool.
Rasmussen went on to say NATO leaders must take steps to make the alliance “fitter, faster, and more flexible to address future challenges from wherever they come.”