Quick Answer
When hypothermic, it is generally beneficial to stay still to conserve body heat, as movement increases heat loss. Staying still can help slow down the progression of hypothermia by minimizing heat loss through movement. However, if in a hazardous environment, such as a rapidly freezing body of water, immediate action may be necessary.
Minimizing Movement to Conserve Heat
When in a cold environment, the goal is to minimize heat loss. Staying still can help achieve this by reducing blood flow to the extremities and conserving heat in the core. In extreme cold, body temperature can drop rapidly, often by as much as 2°C (3.6°F) within the first 30 minutes. Reducing movement can help slow down this process, giving the body a better chance to adapt and recover.
Cold Water Immersion and Hypothermia
If exposed to cold water, movement is generally not recommended, as it can increase heat loss exponentially. In water colder than 15°C (59°F), the body loses heat 25 times faster than in air at 0°C (32°F). If submerged, try to remain as still as possible and avoid thrashing or trying to swim, as this will increase heat loss and put additional strain on the body.
Signs of Hypothermia and Emergency Action
If experiencing any of the following symptoms - shivering, confusion, slurred speech, or dizziness - it is essential to seek shelter and warmth as quickly as possible. In emergency situations, such as being stranded or lost in the cold, try to find shelter in a wind-protected area and use any available materials to insulate yourself. If in a group, huddle together for added warmth, but avoid direct contact with each other, as this can lead to further heat loss.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.