Research
Sex Differences in Sweating: What Research Finds
Do men and women sweat differently? Controlled studies find that at a matched heat load, men tend to produce more sweat — but the difference is smaller and more conditional than folklore suggests. It appears mainly at high heat demands, comes chiefly from greater sweat output per gland rather than more active glands, and is entangled with body size and fitness. Women actually have at least as high a sweat-gland density as men. This page summarizes the verified experimental findings, and flags the confounders that make blanket claims unreliable. It is general education, not medical advice.
By the Sweat Explained Editorial Team · Published 2026-07-13 · Last reviewed 2026-07-13 · Educational information, not medical advice.
Key statistics at a glance
1.61 vs 1.20
back local sweat rate (mg/min/cm2) in men vs women at the highest heat load tested
Gagnon & Kenny 2012
348 vs 307 W/m2
whole-body evaporative heat loss, men vs women, at a fixed 300 W/m2 heat production
Gagnon & Kenny 2012
only at high heat loads
the sex difference in sweating emerged only above a certain requirement for heat loss
Gagnon & Kenny 2012
peripheral, not central
the difference traces to sweat gland output, not to the brain's drive to sweat
Gagnon & Kenny 2012
37 subjects
trained and untrained men and women in a study where training widened the male advantage at higher intensity
Ichinose-Kuwahara 2010
The headline finding, with a caveat
In a tightly controlled experiment, Gagnon and Kenny had 8 men and 8 women exercise at fixed rates of metabolic heat production — 200, 250 and 300 W per m² of body surface area — so both sexes faced the same requirement for heat loss regardless of body size. At the two lower heat loads, whole-body sudomotor activity did not differ significantly between men and women. A difference emerged only at the highest heat load, where men sweated more (Gagnon & Kenny 2012).
That timing is the key nuance. Sex differences in sweating are not a constant gap that applies to everyday warmth; in these data they surfaced only once the demand for cooling was high. Below that point, men and women dissipated heat similarly.
Men vs women at a matched high heat load
All figures below are from the final, highest-intensity period (300 W/m²) of the Gagnon & Kenny study, when the sex difference was present. Values are means ± standard error. Local sweat rate is in mg per minute per cm².
| Measure (final 300 W/m² period) | Men | Women | Source |
|---|---|---|---|
| Whole-body evaporative heat loss (W/m²) | 348 ± 13 | 307 ± 9 | Gagnon 2012 |
| Back local sweat rate (mg·min⁻¹·cm⁻²) | 1.61 ± 0.07 | 1.20 ± 0.09 | Gagnon 2012 |
| Chest local sweat rate (mg·min⁻¹·cm⁻²) | 1.33 ± 0.06 | 1.08 ± 0.09 | Gagnon 2012 |
| Forearm local sweat rate (mg·min⁻¹·cm⁻²) | 1.53 ± 0.07 | 1.20 ± 0.06 | Gagnon 2012 |
Men and women were exercising at the same heat production per unit body surface area, so these gaps are not simply a body-size artifact at this heat load.
Local sweat rate side by side
The same local sweat-rate values, shown as pairs. The male-female gap is consistent across sites but modest — roughly a quarter to a third higher in men at this heat load.
| Group | Value |
|---|---|
| Back, men | 1.61 mg·min⁻¹·cm⁻² |
| Back, women | 1.2 mg·min⁻¹·cm⁻² |
| Forearm, men | 1.53 mg·min⁻¹·cm⁻² |
| Forearm, women | 1.2 mg·min⁻¹·cm⁻² |
| Chest, men | 1.33 mg·min⁻¹·cm⁻² |
| Chest, women | 1.08 mg·min⁻¹·cm⁻² |
Source: Gagnon D, Kenny GP. J Appl Physiol 2012;113(5):746-757. Chart is an original rendering of the cited data.
Where the difference comes from
It is not that men have more sweat glands. Women's active sweat-gland density is at least as high as men's; the sex difference lies in how much each gland puts out. Gagnon and Kenny concluded that the higher male sweat rate at high heat loads is driven by greater output per gland, not by activating more glands — and that this points to a peripheral mechanism at the gland itself rather than a difference in the brain's central drive to sweat (Gagnon & Kenny 2012).
Training reshapes the picture. In a study of 37 trained and untrained men and women, physical training raised sweat rate in both sexes, but the increase was larger in men at higher exercise intensities, widening the gap. Notably, untrained women tended to raise their sweat rate partly by recruiting more active glands, whereas trained individuals and men relied more on increased output per gland (Ichinose-Kuwahara 2010). Fitness status, in other words, is part of what any raw male-female comparison is measuring.
Why blanket claims are unreliable
Simple 'men sweat more than women' statements gloss over several confounders. Body size and surface area affect how much heat must be lost and how it is distributed; aerobic fitness (VO₂ max) independently raises sweating capacity; and heat acclimation shifts sweating in either sex. Because men are on average larger and, in many samples, fitter, uncontrolled comparisons can attribute to sex what is really down to size or training.
The strength of the Gagnon and Kenny design is that it fixed the heat load per unit body surface area, so at the highest load a genuine, size-independent sex difference in maximal sweating remained. But this is an association observed under specific laboratory conditions, not evidence that sex causes a fixed sweating gap in daily life. At everyday, submaximal heat loads the difference was not significant. Individual variation within each sex is far larger than the average gap between them.
How to read these findings
The dependable takeaways are narrow: at high heat demands, men tend to reach a higher maximal sweat rate, driven by more output per gland; at ordinary warmth the sexes sweat similarly; and women's lower average output is offset by an equal or higher gland density. None of this makes one sex's sweating 'better' — both cool effectively, and the differences are averages with wide overlap.
Heavy sweating is not a male-versus-female issue and is not, by itself, a disorder. If sweating is excessive, unpredictable, or interferes with daily life regardless of sex, that is worth raising with a clinician, who can distinguish ordinary heavy sweating from conditions such as hyperhidrosis.
Methodology and limitations
This page relies on controlled human thermoregulation experiments. The core figures come from Gagnon & Kenny (2012, J Appl Physiol), which compared 8 men and 8 women exercising at matched rates of metabolic heat production (200, 250, 300 W/m² body surface area) and measured whole-body evaporative heat loss by direct calorimetry and local sweat rate by ventilated capsule. Training-status findings come from Ichinose-Kuwahara et al. (2010, Exp Physiol), a study of 37 trained and untrained men and women during graded exercise. A companion analysis by Gagnon & Kenny (J Physiol 2012) supports the conclusion that the difference is peripherally mediated.
Limitations: these are small laboratory samples of young, healthy adults, so absolute sweat-rate values are not population norms. Sex is entangled with body size, surface area, aerobic fitness and heat-acclimation status; even matched designs cannot remove every confounder, and different protocols yield different magnitudes. The findings describe an average difference that emerges mainly at high heat loads, with large overlap between individuals. Association under controlled heating is not proof of a fixed real-world gap, and nothing here is a diagnosis or medical advice.
Frequently asked questions
- Do men sweat more than women?
- At a matched heat load, men tend to reach a higher sweat rate - but only once the demand for cooling is high. In one controlled study men and women sweated similarly at lower heat loads, and men sweated more only at the highest load (back sweat rate 1.61 vs 1.20 mg/min/cm2) (Gagnon & Kenny 2012).
- Is it because men have more sweat glands?
- No. Women's active sweat-gland density is at least as high as men's. The difference comes from how much sweat each gland produces: at high heat loads men's glands put out more per gland, which points to the gland itself rather than the brain's drive to sweat (Gagnon & Kenny 2012).
- Does the difference apply in everyday conditions?
- Largely no. In the controlled data the sex difference appeared only at high heat demand; at lower, more everyday heat loads whole-body sweating did not differ significantly between men and women.
- How big is the difference between the sexes?
- Modest. At the highest heat load tested, men's local sweat rates ran roughly a quarter to a third higher than women's, and whole-body evaporative heat loss was 348 vs 307 W/m2. Individual variation within each sex is larger than this average gap.
- Does fitness affect the comparison?
- Yes, substantially. Aerobic fitness raises sweating capacity, and training increased sweat rate more in men at higher intensities in one study of 37 people. Because men are often larger and fitter on average, uncontrolled comparisons can mistake size or fitness for a sex effect (Ichinose-Kuwahara 2010).
- Does sweating more or less mean something is wrong?
- Not on its own, and it is not a male-versus-female matter. Both sexes cool effectively. Sweating that is excessive, unpredictable, or disrupts daily life - in anyone - is worth discussing with a clinician, who can tell ordinary heavy sweating from conditions like hyperhidrosis.
Sources
Primary peer-reviewed studies and official sources first, then reviews and institutional framing (secondary).
- Gagnon D, Kenny GP. Sex differences in thermoeffector responses during exercise at fixed requirements for heat loss. J Appl Physiol. 2012;113(5):746-757. PubMed
- Gagnon D, Kenny GP. Does sex have an independent effect on thermoeffector responses during exercise in the heat? J Physiol. 2012. (Concludes sex differences in sudomotor activity are peripherally mediated.) Full text
- Ichinose-Kuwahara T, Inoue Y, Iseki Y, Hara S, Ogura Y, Kondo N. Sex differences in the effects of physical training on sweat gland responses during a graded exercise. Exp Physiol. 2010;95(11):1026-1032. PubMed
How to cite this page
Sweat Explained. Sex Differences in Sweating: What Research Finds. Published 2026-07-13; last reviewed 2026-07-13. Available at: https://sweatexplained.com/research/sex-differences-in-sweating-research
Please cite the original studies for the underlying figures. Journalists are welcome to link to this page; the charts are original renderings of the cited data.