Nearly 120 million American adults have high blood pressure.
The saying goes that you should stay out of the kitchen if you can’t take the heat, but new research suggests otherwise — for the sake of your blood pressure.
In a study published in the Journal of Applied Physiology, researchers at UNT Health Fort Worth found at-home heat therapy may hold the key to lowering blood pressure. A group of older adults wore heated pants for an hour a day, four days a week. After eight weeks, their blood flow improved and their systolic blood pressure, which measures blood flow when the heart beats, dropped by around 5 points.
The study comes at a time when nearly 120 million American adults have high blood pressure, but only one in four of those adults has it under control. In Texas, about 32% of adults report being told by a health care professional they have high blood pressure. And in 2023, high blood pressure was a primary or contributing cause in over 664,000 deaths in the United States, according to the Centers for Disease Control and Prevention.
Exploring ways to reduce the risks of high blood pressure — like stroke and heart attack — is crucial, and “this is an important proof-of-concept study,” said Dr. Amit Khera, a cardiologist and professor of medicine at UT Southwestern Medical Center, who was not involved in the research.
Khera doesn’t see heat therapy “as a replacement for blood pressure medicine,” he said, but he does find it intriguing. “It could be a potential adjunctive treatment for other heart diseases and problems.”Crank up the heat
Anyone who’s stepped out of a sauna or settled into a hot tub knows heat can feel good. Research backs that up: A 2025 study found soaking in hot water can lower blood pressure, stimulate the immune system and, over time, improve how the body handles heat stress.
Other studies similarly found heat therapy can improve cardiovascular function in middle-aged and older adults — whether or not they have chronic diseases — and that its benefits can be comparable to aerobic exercise, said Scott Romero, an associate professor of physiology and anatomy at UNT Health, who led the study.
“The crazy thing is, the cardiovascular responses to heat exposure are almost identical to exercise,” Romero said. “Heart rate changes, blood flow changes, muscle changes.
