Overview
- A six‑week study in the Netherlands of 47 overweight adults found vest users lost 0.9 kg of mostly fat on average while controls gained 0.6 kg.
- The results were presented at the European Congress on Obesity and represent an early real‑world test of daily cold exposure.
- Researchers attribute the effect to brown fat and shivering muscles that burn calories to make heat.
- Activity data from fitness trackers suggested the weight change was not due to extra exercise.
- The team has begun a separate trial in 34 women asking them to take 90‑second cold showers each morning, with heart‑foundation funding and a call for larger, longer studies.