Lifting has replaced weight loss at the top of the New Year list

The New Year resolution has changed shape. For most of the last three decades it was about losing weight. The December survey data suggest it is now about getting stronger.

The evidence base for that shift is genuine. It is also more modest, and shaped differently, than the way strength training is currently discussed.

What people say they are going to do

Life Time, a US fitness company, surveyed more than 750 people — a mix of general consumers and its own members — between 1 and 22 December [s1]. It is a commercial survey of a self-selecting population, and should be read as a description of intent among people already oriented toward fitness, not as a national estimate.

Within those limits, the pattern is clear. Getting physically stronger was the top primary health goal, at 42.3% [s1]. Lifting more weights was by far the most common answer for what kind of training people planned to do more of, at 46.5% [s1]. Eighty-two per cent said they intended to focus more on overall health and wellbeing in the year ahead [s1].

Motivations split between overall fitness (46.4%) and longevity (33.2%) [s1]. Asked which trend would define 2026, respondents named longevity (37.8%), ahead of GLP-1 medications and peptides (24.4%) and AI-guided training (14.6%) [s1].

What the mortality evidence actually shows

The most useful synthesis of muscle-strengthening and hard outcomes is a systematic review and meta-analysis of 16 prospective cohort studies published in the British Journal of Sports Medicine [s2].

Comparing any muscle-strengthening activity with none, it found:

• 15% lower all-cause mortality (relative risk 0.85) [s2]
• 17% lower risk of cardiovascular disease (RR 0.83) [s2]
• 17% lower risk of diabetes (RR 0.83) [s2]
• 12% lower risk of total cancer (RR 0.88) [s2]
• 10% lower risk of lung cancer (RR 0.90) [s2]

Those are meaningful associations. They are not the transformative numbers that circulate in longevity marketing.

The part that gets left out: the curve is J-shaped

The dose-response finding is the more interesting result, and the one least often repeated.

Maximum benefit occurred at roughly 30 to 60 minutes of muscle-strengthening a week [s2]. All-cause mortality risk was lowest at about 40 minutes a week, a 17% reduction; cardiovascular disease risk was lowest at 60 minutes, an 18% reduction; total cancer risk was lowest at 30 minutes, a 9% reduction [s2]. Diabetes followed an L-shaped curve, with benefit continuing through 60 minutes a week [s2].

Beyond that range, the curve for most outcomes flattens or turns back — which is what "J-shaped" means. The authors are explicit that the effects of high-volume training, above about 130 minutes a week, remain unclear [s2].

That is not an argument against training more. Strength, function and quality of life are separate outcomes from mortality, and this analysis was not designed to measure them. It is an argument against assuming the mortality benefit scales with volume. On this evidence, it does not obviously do so past an hour a week.

One more finding is worth carrying: muscle-strengthening combined with aerobic activity was associated with 40% lower all-cause mortality [s2] — a larger reduction than either alone. The current enthusiasm for lifting is not a reason to drop the cardio half of that.

What this evidence cannot do

Every study in the analysis is a prospective cohort. These are associations, not causal effects. People who strength-train differ systematically from people who do not — in baseline health, income, mobility and much else — and reverse causation is a live concern, since illness reduces training long before it appears in the mortality column.

The authors list their own constraints plainly: a small number of studies per outcome, most of them conducted in the United States, activity measured by self-report, an inability to assess publication bias, and residual confounding inherent to observational designs [s2].

Self-reported activity in particular tends to inflate. What people record as their weekly training is generally more than what they do.

The context nobody in the survey is in

Globally, 31% of adults — about 1.8 billion people — do not meet recommended activity levels, a figure that rose five percentage points between 2010 and 2022 and is projected to reach 35% by 2030 [s3]. Eighty per cent of adolescents fall short [s3]. Women are less active than men by an average of five percentage points, a gap that has persisted since 2000 [s3]. WHO's baseline recommendation for adults is at least 150 minutes of moderate-intensity activity a week [s3].

That is the denominator the New Year conversation sits inside. The population deciding between hypertrophy protocols is small. The population doing nothing is 1.8 billion.

Against that backdrop, the most consequential finding in the strength-training literature is the first comparison in the meta-analysis: any versus none [s2]. The gap between zero and something is where the effect sizes live.

This article is informational and is not medical advice, and is not a training prescription.

What to watch

Whether randomised trials with hard outcomes ever arrive — they are difficult to run and, for mortality, effectively impossible at this scale — and whether the high-volume region of the dose-response curve above 130 minutes a week [s2] gets characterised. It is the part of the graph the current cultural moment is heading toward, and the part the evidence is quietest about.