Handshake: Window on Your Genes?

The article reports on a study conducted by evolutionary psychologist Gordon Gallup and colleague of the State University of New York in Albany on the relations between hand grip strength (HGS) and genetic fitness. The study found that a firm handshake is an indicator of genetic fitness. The findings link grip strength to aggressive behavior and sexual history. In the study, female participants showed no correlation between HGS and sexual history or social behaviors. Men with high HGS started having sex sooner and were more aggressive during high school.