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[00:00.45] When we think of low temperature as a danger, we often imagine people working outside in polar regions in the depths of winter or in cold storage facilities, layered in thermal clothing to help them deal with freezing temperatures.

[00:17.45] But do we also need to protect ourselves when it's just a bit chilly as well as in arctic conditions?

[00:25.41] As mammals, our bodies have to maintain an internal temperature in a narrow range between 37 and 37.5C.

[00:36.04] If that temperature drops, the effects can be serious. Below 35C, people can develop hypothermia, with symptoms such as shivering, confusion, and slurred speech.

[00:51.18] If body temperature drops below 29C, it can lead to loss of consciousness.

[00:58.35] Fortunately our bodies can regulate their internal temperature, but there are some negative side effects which come with this process.

[01:07.92] Ten degrees Celsius is hardly biting cold, but that's the temperature that BBC journalist James Gallagher was made to endure in an experiment at the University of South Wales.

[01:20.93] As the test room was cooled from 21 degrees, his blood pressure, heart rate and breathing rate all increased, while the flow of blood to his brain decreased by 20%.

[01:34.21] What are the consequences of this? Immediately, it meant that Gallagher took longer to solve some simple puzzles.

[01:42.44] As a longer-term risk, Professor Damian Bailey points out that increased blood pressure puts us at greater risk of stroke and heart attacks.

[01:52.27] Professor Bailey suggests that in the cold, people should wear clothing that provides good insulation, eat more carbohydrates, and be more active.

[02:03.69] Another approach is suggested by Professor Christopher Minson.

[02:07.95] He believes that people are too reliant on being able to control the temperature around them, and that we can gradually train ourselves to cope with a lack of warmth and be comfortable at lower temperatures.

[02:22.82] So, while moderately low temperatures can have an effect on us, there are steps we can take to cope with them.