Scientists Reveal Why You Should Never Use Mouthwash After Exercising

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Researchers from the University of Plymouth have found that using anti-bacterial mouthwash can reduce the benefits of exercise by interfering with oral bacteria.

If you regularly find yourself reaching for the mouthwash, you may unknowingly be reducing the benefits of exercise , a new study has warned.

Researchers from the University of Plymouth have found that using anti-bacterial mouthwash can reduce the benefits of exercise by interfering with oral bacteria.

Physical exertion is known to lower blood pressure but the effects are significantly reduced when people use mouthwash instead of water.

A team of international scientists said the results showed the importance of oral bacteria in cardiovascular health.

They are urging health professionals to pay attention to the oral environment when recommending interventions involving physical activity for high blood pressure.

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Researchers asked 23 healthy adults to run on a treadmill for 30 minutes on two separate occasions, after which they were monitored for two hours.

At one, 30, 60 and 90 minutes after exercise they were asked to rinse their mouths with a liquid – either antibacterial mouthwash or a placebo of mint-flavoured water.

Their blood pressure was measured and saliva and blood samples were taken before exercise and at 120 minutes after exercise.

The study found that when participants rinsed with the placebo, the average reduction in systolic blood pressure was minus 5.2 mmHg at one hour after exercise.

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