Scientists from Kurume University found that drinking more coffee may reduce the death risk caused by increased heart rate.
Metabolic syndrome is a cluster of conditions that occur together, increasing your risk of heart disease, stroke, and type 2 diabetes.
These conditions include increased blood pressure, high blood sugar, excess body fat around the waist, and abnormal cholesterol or triglyceride levels.
It is well known that people with metabolic syndrome have a higher resting heart rate.
A normal resting heart rate for adults ranges from 60 to 100 beats per minute. Generally, a lower heart rate at rest implies more efficient heart function and better heart fitness.
For example, a well-trained athlete might have a normal resting heart rate closer to 40 beats per minute.
Previous research found that increased heart rate is strongly related to death, and that coffee drinking was linked to a lower risk of metabolic syndrome.
In the current study, researchers hypothesized that drinking more coffee may decrease all-death risk by reducing resting heart rate.
They analyzed data from a total of 1920 residents aged over 40 years who received health checkups in 1999.
The team measured symptoms of metabolic syndrome, and their eating and drinking patterns were evaluated by a food frequency questionnaire. The researchers followed up the participants annually for 15 years.
They found during the follow-up period, 343 of the participants died. Of these, 102 people died of cancer, 48 of brain- heart diseases, and 44 of infectious diseases.
The team showed that drinking more coffee was linked to lower resting heart rates. In addition, people who drank more coffee had a lower death risk.
In people who drank less coffee, the death risk was higher, which was linked to increased resting heart rate. But heart rate was not linked to death risk in people who drank more coffee.
These findings suggest that drinking more coffee may help protect against death due to reducing resting heart rate.
The research is published in Heart and Vessels, and was conducted by Yume Nohara-Shitama et al.
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