Khaberni - Research and health experts have shone a spotlight on a simple daily method that could carry significant benefits for heart health, characterized by immersing the body in hot water for specific periods, as part of what is known as "passive heating therapy".
According to a scientific review published in the Journal of Applied Physiology, exposing the body to heat without physical activity can safely elevate its internal temperature; this may positively reflect on blood pressure and some indicators related to cardiovascular health, noting that responses vary among individuals.
Passive heating therapy relies on a simple principle, which is to raise the body's temperature through external means, such as hot baths, a method known in various cultures for centuries, as seen in Japanese springs and traditional baths in different parts of the world.
The results of the analyzed studies indicate that immersing the body in water with temperatures between 39 and 40 degrees Celsius leads to dilation of blood vessels and increased blood flow, a natural physiological response to heat, which may contribute to lowering blood pressure in some individuals.
Initial research has shown that bathing in hot water for periods ranging between 15 and 30 minutes, at slightly higher temperatures, may be linked to a significant reduction in systolic pressure, which is a crucial factor in evaluating the risk of heart disease.
One study linked regular hot water bathing to a marked reduction in the risk of cardiovascular disease, but researchers emphasized that these results are derived from observational studies; this means that they do not prove a direct causal relationship.
The review clarifies that the benefits appeared more pronounced and consistent among elderly individuals with hypertension who adhered to medical treatment, while the effects were less consistent among healthy young individuals or untreated cases.
The results were not limited to blood pressure only, as the review pointed to other possible effects, including improved sleep quality and reduced stress levels, which may be associated with the effects of heat on the nervous system.
Blood pressure exceeding 130 over 80 mmHg is an indicator of elevation, a major risk factor for heart, brain, and kidney diseases. Medical research indicates that even a slight reduction in systolic pressure can decrease the chances of long-term heart complications.
Regarding safe use, experts advise against excessively high water temperatures and prolonged exposure to high heat, along with ensuring body hydration and drinking water, in addition to gradually getting up after bathing to avoid dizziness or sudden drops in blood pressure.
