Ice for injuries: does it really work?
Applying ice to an injury is a reflex most of us know: you were training, something clicked, and your first instinct is to reach for an ice pack. But is using cold therapy for an injury actually justified, or is it just a convenient old habit? Ulster University looked into the question, and the results deserve attention.
Why ice helps with an injury
Researchers at the Institute of Medicine and Health Science at Ulster University in Ireland analyzed how cold affects injured tissue. The result confirmed folk wisdom: ice therapy for an injury really is effective. But then came a surprise.
The best effect was achieved not by keeping an ice pack on continuously, but by using 10-minute icing periods. That means: apply cold therapy to the injury for 10 minutes, then take a break, then apply it again.
The International Sports Medicine Journal published the study’s results, according to which this repeated-application method helps keep the muscle temperature low without damaging the skin. While the skin returns to normal temperature, the deeper muscle tissue stays cool — and that is what matters in treating an injury.
Ice for injuries: how to use it correctly
Here is a detail many people don’t know: ice must not be placed directly on the skin. The researchers found that a thin towel between the ice and the skin is actually a better method than a regular ice pack. The reason is simple — through the towel, a small amount of cold vapor reaches the injured muscle tissue through the skin, without the skin suffering cold damage.
A practical guide:
- Wrap the cold therapy for the injury in a towel — not directly on the skin.
- Hold it for 10 minutes, then take a break.
- Repeat as needed.
- Don’t leave ice in place for hours in the hope that more is better.
When ice isn’t enough for an injury
A simple truth: ice therapy for an injury relieves but does not heal. Cold reduces swelling and numbs pain, which gives the body time for recovery. It is no substitute for a doctor if you suspect a more serious injury — a ligament tear, a fracture or chronic inflammation needs more than 10-minute ice therapy.
If the pain doesn’t ease within 48 hours or the swelling grows, it’s time to seek medical care. Cold therapy for an injury is first aid, not treatment.
FAQ: ice for injuries
How long should you hold ice on an injury?
According to the study, 10-minute periods are optimal. A longer single exposure doesn’t give better results and can damage the skin.
Does a frozen drink bottle work too?
Yes, it does — but still wrap it in a towel. The principle is the same: a cold surface, not direct contact with the skin.
Isn’t using heat better for an injury?
In the first 48 hours, prefer cold — it reduces swelling. Heat is useful in the later recovery stage, once the acute inflammation has passed.
Author: Muscle&Fitness, translated by K.Reial
Source: WHO – physical activity.
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