The 60-Minute Myth: Why “Optimal Exercise” Advice Misses the Point, By Brian Simpson and John Steele

We are told, with growing confidence, that there exists an "optimal dose" of strength training, forty to sixty minutes per week; a claim recently repeated by Joseph Mercola (link below). Beyond that, the benefits diminish. Push further, and the narrative darkens: excessive lifting may strain the body, reduce longevity, even worsen mortality outcomes compared to more moderate effort.

It is a striking claim. It is also deeply misleading.

The problem lies not in the data itself, but in how it is interpreted. These conclusions are typically drawn from observational studies of Western populations, populations already shaped by sedentary work, artificial diets, fragmented sleep, and chronic stress. Within that context, it is unsurprising that a modest amount of structured exercise appears beneficial, and that excessive, isolated training may introduce new risks. But to elevate this into a universal law of human physiology is to mistake a local pattern for a general truth.

Consider a broader perspective. Across large parts of the world, particularly in non-Western and historically pre-industrial societies, people engage in sustained physical labour not for forty minutes a week, but for hours each day. Farming, carrying, walking, lifting, digging: these are not "workouts," but ways of life. And yet such populations have often displayed considerable longevity, frequently outliving their more sedentary, better-fed Western counterparts.

This does not mean that "more is always better." It means something more fundamental: the human body evolved for continuous, varied, and context-rich physical activity, not for brief, artificially segmented bouts of resistance training inserted into otherwise inactive lives.

The modern framing of exercise treats the body as if it were a machine requiring periodic calibration. Forty minutes of lifting here, a jog there, carefully measured and optimised. But this approach isolates exercise from the broader ecological conditions in which health emerges. It ignores the fact that physical activity in traditional settings is embedded within patterns of diet, sunlight exposure, social interaction, and circadian rhythm, all of which interact in ways that no controlled study can fully capture.

When research claims that excessive lifting may worsen outcomes, what is it really measuring? Often, it is capturing a subset of individuals who push intensity without corresponding recovery, people who train hard but sit the rest of the day, who lift heavy but sleep poorly, who exercise intensely but live in metabolic environments shaped by processed food and chronic stress. In such cases, the problem is not that the body cannot tolerate effort. It is that effort has been stripped from its natural context.

There is also a selection effect at play. Individuals engaging in high levels of structured strength training are not necessarily comparable to those performing moderate activity. They may differ in age, injury history, motivation, or underlying health conditions. Some may be compensating for declining health; others may be pursuing performance extremes that carry their own risks. Observational data struggles to disentangle these factors, yet the conclusions are often presented with unwarranted certainty.

The comparison with traditional lifestyles exposes the weakness of the "optimal dose" argument. A subsistence farmer does not collapse into early mortality because he exceeds sixty minutes of resistance work. A labourer does not suffer diminished longevity because his daily tasks involve continuous physical exertion. On the contrary, the combination of movement, purpose, and environmental integration appears to support robust health over the long term.

What differs is not the quantity of effort, but its structure. Traditional activity is varied rather than repetitive, moderate rather than extreme, and distributed across the day rather than concentrated into brief sessions. It is accompanied by recovery built into the rhythm of life, rather than treated as a separate optimisation problem.

The notion that there exists a narrow window of "optimal" exercise, beyond which harm begins, is therefore less a discovery about human biology than a reflection of modern conditions. It tells us how much artificial exercise is needed to partially offset an artificial lifestyle. It does not tell us how the human body is meant to function.

This distinction matters, because the language of optimisation subtly reshapes behaviour. If sixty minutes is optimal, then more must be dangerous. If structured training is the benchmark, then unstructured activity becomes invisible. The result is a population that measures health in minutes of exercise while ignoring the remaining twenty-three hours of the day.

A more honest conclusion would be less precise and more unsettling. Health is not produced by hitting a weekly quota of resistance training. It emerges from a pattern of living in which movement is constant, varied, and integrated with the rest of life. Within such a pattern, the question of whether forty minutes or ninety minutes of lifting is "optimal" becomes largely irrelevant.

The real problem is not that people exercise too much. It is that they live in a way that makes exercise necessary in the first place.

And no number of carefully measured minutes can fully compensate for that.

https://articles.mercola.com/sites/articles/archive/2026/03/20/resistance-training-cognitive-benefits.aspx