Sweat, heat and sun protection
during land-based exercise
Running, cycling, hiking, racquet and field sport, golf, climbing, gardening and outdoor work. The problem here is not being in water. It is sweat rate, friction and equipment: product moving with sweat, running into your eyes, being wiped off by a helmet strap or a collar, and long hours in the open with no shade. We map what each sport presents to the sun, and we recommend no products at all.
We do not cover the laboratory test methodology behind water resistance claims on sun protection products. That is a separate subject, thoroughly covered elsewhere, and repeating it here would only add to the confusion this site exists to remove.
We name no brands, recommend no products and carry no affiliate links anywhere on this site. Our funding is set out in full on the about page.
Six sections
Sweat and transfer
Sweat arrives from underneath a protective film rather than over it, it is produced unevenly, and it comes with hours of friction from kit. This section is the mechanism.
5 piecesSport exposure maps
One map per discipline: the surfaces exposed, the angle, the duration, what removes protection from each, and the control that holds there.
7 piecesTerrain and weather
Ground and sky change the exposure more than kit does. Altitude, reflection off snow and rock, shade in a route, and the two numbers that should set a session plan.
5 piecesOutdoor work
Gardening, grounds work, construction and coaching. What a duty of care covers, what a seasonal total looks like, and how to run a briefing people act on.
5 piecesKit and clothing
Cloth, headwear, eyewear and the surfaces everybody misses. The section for anybody who has worked out that a film cannot survive four hours under a strap.
6 piecesHeat and physiology
Heat as the risk that arrives in hours rather than decades, the training block problem, spring, the commute, and what to record after a long day.
5 piecesStart here
The exposure map method
Every sport shows a different set of body surfaces, at a different angle, for a different length of time, with a different thing removing protection from each. Map that and the plan writes itself.
Sweat is not immersion
Almost every question about sun protection in sport gets answered with guidance written for swimming. Sweat behaves differently, fails differently, and needs a different plan.
The stinging eyes problem
The single most common reason people stop using sun protection on the face during exercise, and the one problem with a genuinely mechanical solution.
Cycling and its exposed geometry
No other sport holds a body in one position for so long. That is what makes cycling's exposure map so sharply defined and so consistently misjudged.
Gardening as unrecognised exposure
It is not classified as sport, it happens at the worst hours, it lasts all afternoon, and the posture presents the worst possible surfaces. Gardening is the quiet outlier.
Clothing as the primary control
Cloth does not migrate, does not sting, is not wiped off by a strap and performs the same in hour four as in hour one. For anybody exercising long, it is the first control, not the last.
The training block problem
People remember the one scorching day. The total comes from four ordinary sessions a week for five months, none of which felt like anything at all.
Altitude and ultraviolet
Ultraviolet increases as you climb, and the air gets colder as it does. The two signals point in opposite directions, which is why hill days catch people out.
34 articles, 53,155 words, no product recommendations, no affiliate links and no ranking of anybody. Published independently. Nothing here is medical advice. For anything on your skin, or for heat illness, see the NHS, a GP, or call 999 where it is genuinely urgent.
The session brief
One email a month on exposure, heat and sun protection for people who train outdoors and people who work outdoors. No product recommendations, because we do not make any. Each issue carries a single clearly labelled sponsor line that has no influence on anything above it.
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