Ian Sample

speaker

2,123 appearances 29 recordings 3 series first heard Apr 2026 last heard 3d ago

Ian Sample’s voice in public audio — every appearance, attributed to the second.

Trend

recordings per month · last 12 months

Recordings per month over the last 12 months — 29 in all, peaking in Jun 2026 with 8.

Appearances

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Science Weekly · Four types of thinker, the cyclosporiasis outbreak, and the UK’s biggest telescope threatened · 6 Aug 2026 podcast

And so there are some options that are being explored, but none of those are in the bag yet. matched

That's a really fair point. matched

This is The Guardian. matched

Science Weekly · Revisited: Saunas and cold plunges, where does the evidence stand? · 30 Jul 2026 podcast

The temperatures can vary a lot for both, but let's start with saunas. voice-verified

I mean, for your traditional Finnish sauna, you know, those classic wood-lined room with a burner in the corner or a heater, you're looking at 70 to 100 degrees Celsius. voice-verified

So it's obviously pretty toasty. voice-verified

As for cold water immersion, again, huge variability as to what people class as cold water here. voice-verified

But we're going to focus on temperatures between 10 and 15 Celsius. voice-verified

I mean, ice baths, plunge pools can be as cold as a few degrees, as can rivers or lidos in the winter. voice-verified

And of course, some people will swim in polar waters, and those can actually go sub-zero thanks to the salt content. voice-verified

But that's obviously pretty risky. voice-verified

Well, the first thing you'll notice is that obviously your skin and your hair start to heat up. voice-verified

And then depending on how long you stay in, your core body temperature will start to rise gradually from 37 degrees C as normal up to around 39 C. Now, your body has to respond to that rise in temperature to ensure it doesn't overheat. voice-verified

People will probably be aware that your blood vessels expand or dilate. voice-verified

This is called vasodilation. voice-verified

And that improves blood flow to the skin and your heart rate also increases. voice-verified

So you get this boost to your circulation. voice-verified

At the same time, you start sweating. voice-verified

And when that water evaporates off your skin, it helps you to cool down. voice-verified

So if you think about your blood vessels opening up a bit more and allowing blood to get to the surface of your skin, it's improving how well it can do heat exchange. voice-verified

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