Clinical Implications Of Thermal Therapy In Lifestyle Related Diseases

Researchers from Kagoshima University studied how regular sauna therapy affects people with lifestyle-related health conditions like heart disease, high blood pressure, diabetes, and obesity. They had participants use saunas heated to 60°C (140°F) for 15-minute sessions and tracked various health markers over time.

The study found that repeated sauna therapy produced several significant health benefits. For people with heart failure, sauna sessions improved heart function and reduced symptoms like fatigue, swelling, and poor appetite. The therapy also enhanced the function of blood vessel walls (called endothelial function), which is often damaged in people with high blood pressure, high cholesterol, diabetes, and obesity. This improvement in blood vessel health may help prevent atherosclerosis - the hardening and narrowing of arteries that leads to heart attacks and strokes.

Interestingly, the researchers found that sauna therapy affected appetite and weight differently depending on a person's starting weight. In underweight patients with poor appetite, sauna sessions increased levels of ghrelin (the "hunger hormone"), leading to improved appetite and increased daily calorie intake. However, in obese patients, sauna therapy led to significant reductions in both body weight and body fat over just two weeks, without the appetite-stimulating effects.

The researchers believe these benefits occur because sauna therapy causes blood vessels throughout the body to dilate, improving circulation and triggering beneficial changes at the cellular level. This research suggests that regular sauna use could be a valuable addition to treatment plans for patients with metabolic and cardiovascular conditions, offering a simple, non-pharmaceutical approach to improving multiple aspects of health simultaneously.