Raising the American Weakling

Tom Vanderbilt:

Unlike most findings in the sleepy field of occupational therapy, her findings, which were published last year in the Journal of Hand Therapy, touched off a media firestorm, as the revelation seemed to encapsulate any number of smoldering fears in one handy conflagration: The loss of human potential in the face of automation, of our increasing time spent on smartphones and other devices, the erosion of our masculine norms,2 of the fragility and general shiftlessness of millennials. Even taking into account the cautionary statistical notes—that the sample sizes of the 1980s studies were not huge, that Fain’s study was mostly college students—the idea of a loss in human strength, expressed through a statistical measure hardly anyone had previously heard of, seemed to hint at some latter-day version of degeneration.

That message was reinforced by the sheer predictive power of grip strength. In a study published in 2015 in The Lancet, the health outcomes of nearly 140,000 people across 17 countries were tracked over four years, via a variety of measures—including grip strength.3 Grip strength was not only “inversely associated with all-cause mortality”—every 5 kilogram (kg) decrement in grip strength was associated with a 17 percent risk increase—but as the team, led by McMaster University professor of medicine Darryl Leong, noted: “Grip strength was a stronger predictor of all-cause and cardiovascular mortality than systolic blood pressure.”