News item

Doctors at the hospital (in Sweden) said humans would normally be able to survive for about four weeks without food. Besides eating snow, the man probably survived by going into a dormant-like state, physician Stefan Branth told Vasterbottens-Kuriren.

"A bit like a bear that hibernates. Humans can do that," he said. "He probably had a body temperature of around 31 degrees (Celsius) which the body adjusted to. Due to the low temperature, not much energy was used up."
Jim

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These are my own opinions based on wisdom earned through many wrong decisions. Your mileage may vary.