Why Do People Do Contrast Therapy?

Contrast therapy is simply moving your body through hot and cold environments repeatedly.

At WellNest in London Bridge, contrast therapy usually means moving between our saunas and ice baths, cycling between heat and cold to create a physical and mental reset. While some people use contrast therapy as part of their training recovery. Others come for the energy, clarity or simply the feeling of switching off from everything outside the room.

So, what is contrast therapy?

Contrast therapy involves intentionally exposing the body to alternating periods of heat and cold.

A typical session might involve spending 10-15 minutes in the sauna before moving into an ice bath for 1-3 minutes, resting briefly, and repeating the process. The change in temperature creates two very different experiences for the body.

Heat encourages blood vessels to widen, known as vasodilation, while cold causes them to narrow, known as vasoconstriction. Moving between the two creates a repeated expansion and contraction of the blood vessels, often described as a pumping effect through the circulatory system.

For many people, this is what makes contrast therapy feel so restorative.

What happens to your body?

The heat of the sauna raises skin temperature and increases blood flow as the body works to regulate its temperature. Your blood vessels will widen, increasing circulation as your muscles begin to relax.

Then you move to the cold. Cold exposure causes blood vessels near the skin to narrow as the body works to preserve its heat. This is why ice baths are commonly used after exercise to temporarily reduce soreness, swelling and the inflammatory response associated with hard training.

It’s important to remember that contrast therapy is not a magic fix. It works best as one part of a wider approach to recovery that includes movement, sleep, nutrition and rest.

But what about your brain?

The benefits people notice with contrast therapy are not always physical. There is something very different about sitting quietly in the heat of a sauna and then deliberately stepping into cold water.

The sauna gives your brain permission to slow down. The warmth can feel calming, giving you a few minutes without screens, notifications or anywhere else you need to be. The cold then provides an almost opposite effect.

The initial sensation demands your attention. Your breathing changes, your awareness sharpens and, for a moment, there is very little room to think about anything else.

Cold exposure can stimulate the release of stress-related hormones and neurotransmitters that contribute to the heightened sense of alertness and energy many people experience afterwards. It is this combination that makes contrast therapy unique.

You’ll find calm in the heat, and clarity in the cold. For many, the result is a feeling of being both relaxed and energised at the same time