Researchers from the University of Cambridge and University College London found: male runners in the womb receiving high doses of testosterone. It strengthens the cardiovascular system and improves their future reproductive function, writes The Daily Mail.
In the study, researchers analyzed the health status and other data of 532 runners. Estimated even length toes. It is known that men with long index finger is more common with a high level of testosterone.
It was found that runners with masculine proportions nameless and index finger ran the marathon at a 10% faster with representatives of the least courageous ratio. Similar correlation was also observed among women, however, it is less visible.