What does your handshake say about you?

Via NYT:

People with high grip-strength scores are usually healthier than those with weak grips. “They live longer and recover faster from injury,” Gallup says. “They have reduced disability, higher bone density and greater fat-free body mass.” And in a study published this year, Gallup and his son Andrew — at the time an undergraduate psychology major — found that males with high grip-strength scores reported being more aggressive and dominant and had more masculine body types (broader shoulders, narrower hips). They also had “increased sexual opportunities,” which resulted in an increased number of sexual partners, and younger ages of first sexual encounter. (For women, handgrip may be more about sexual protection than prowess: Gallup has found that women’s hand strength increases when they’re most fertile, a trait he says may have evolved to prevent forced impregnation by unwanted mates.)