A 2016 study found that healthy men aged 20 to 34 at several North Carolina universities had weaker grips than the age-matched reference values collected around Milwaukee in 1985. Among men aged 25 to 29, the gap for the right hand averaged 25.8 pounds.

That result is real, but the familiar description that young men are weaker than their fathers goes beyond it. The researchers did not test fathers and sons, and their sample included only 83 men. This is one study, not settled consensus.

This is not medical or fitness advice. I am reading the measurements and asking what they can, and cannot, tell us about generational change.

What the 2016 study measured

Elizabeth Fain and Cara Weatherford reported the work in the Journal of Hand Therapy. Their cross-sectional study recruited 237 healthy full-time students aged 20 to 34 from university settings in North Carolina. The group included 154 women and 83 men.

Each participant squeezed a hand dynamometer, an instrument that records grip force, and used a gauge to measure lateral pinch strength. The researchers then compared the averages by age and sex with clinical reference tables published three decades earlier.

The male grip averages were statistically lower than the older norms across the age bands. For men aged 25 to 29, right-hand grip was lower by 11.7 kilograms, or 25.8 pounds, while left-hand grip was lower by 8.6 kilograms, or 18.9 pounds. Men aged 30 to 34 also recorded lower averages, although that subgroup contained only four participants. Pinch strength was generally closer to the old values.

Women did not show the same consistent pattern. Grip values were lower in some younger female groups, but women aged 30 to 34 were not weaker than the reference group.

The “fathers” were actually a 1985 reference sample

The comparison group came from a 1985 paper led by occupational therapist Virgil Mathiowetz in the Archives of Physical Medicine and Rehabilitation. That team tested 638 adults aged 20 to 94 from a seven-county area around Milwaukee and produced age- and sex-specific norms still used in clinical work.

Those participants were not related to Fain and Weatherford’s students. The two studies were conducted in different states, recruited people in different ways and sampled different local populations. Height, body size, occupation, sports participation and other characteristics can influence grip, yet the later study was not designed to match the two groups on all of them.

Calling the 1985 men “their fathers” turns two cross-sectional snapshots into a family comparison that never occurred.

There is another sampling problem inside the 2016 paper. Of the 83 men, 63 were aged 20 to 24, 15 were 25 to 29, and only four were 30 to 34 in the published table. A 25.8-pound average difference sounds definitive until the reader sees that the relevant modern subgroup had 15 men.

Why grip and pinch may tell different stories

Fain and Weatherford suggested that changes in work and hand use might help explain lower grip alongside relatively stable pinch strength. Daily life now involves more keyboards, phones and other tasks that recruit precision movements without demanding sustained whole-hand force. That explanation is plausible, but their study did not measure decades of technology use or prove it caused the difference.

Grip strength also reflects more than the hand. Forearm muscle, body size, general muscularity, pain, familiarity with the test and effort on the day can all affect a dynamometer reading. This is why clinicians need reference values that resemble the person being assessed, and why an old regional table may become less suitable even if the entire population has not weakened.

I recently wrote about a different strength question in a ten-year study of muscle fibers in older adults. That work followed the same people and could separate changes within individuals from differences between groups. The millennial grip study cannot do that. Nobody in it was measured in 1985 and again in 2016.

National data make the trend less certain

A separate study led by Paul Loprinzi examined grip measurements from 12,295 people in the nationally representative US National Health and Nutrition Examination Survey. Comparing the 2011–2012 and 2013–2014 survey waves, the researchers found no change in absolute or body-size-adjusted grip strength across the age, sex and racial or ethnic groups they evaluated.

That study covered only four years, so it cannot answer whether strength changed between 1985 and the 2010s. It does show why a broad generational claim needs broader evidence than one campus sample.

International findings are mixed as well. An age-period-cohort analysis using more than 27,000 observations from English adults over 50 found age was the dominant influence on grip strength, with only minimal evidence for historical-period or birth-cohort effects. The authors noted that previous studies have reported declining, improving and unchanged strength across cohorts.

What would establish a generational decline

A stronger test would use large, nationally representative samples measured decades apart with the same equipment, posture and instructions. It would record height, body composition, occupation, activity and other factors that differ between generations. Following families could address the father-son version directly, although even that would need to separate age from changing environments.

The 2016 study did something useful: it showed that a set of 1985 clinical norms may not describe every young adult tested thirty years later. It also produced a large and measurable gap among the men in its sample.

For now, that is evidence that the old tables deserve updating, not a verdict that a generation of young men has lost its strength.