Using mouthwash could reduce the benefits of working out, study says

Why excessive mouthwash use blunts the benefits of exercise

As part of the study, 23 healthy adults were asked to run on a treadmill for a total of 30 minutes on two separate occasions, after which they were monitored for two hours. On each occasion, they rinsed their mouths out after training with either mint-flavoured water or antibacterial mouthwash. These rinses were done one minute after working out, and then again at 30, 60 and 90 minutes after. Participants did not know whether they were rinsing with the water or mouthwash. Their blood pressure was measured and saliva and blood samples were taken before and after exercise.

What did the evidence show?

  For people given antibacterial mouthwash, the blood pressure-lowering effect of exercise was lower by more than 60% in the first hour after training, and totally abolished two hours after exercise.

What the scientists say

Craig Cutler, study co-author, said: "In effect, it's like oral bacteria are the 'key' to opening up the blood vessels. If they are removed, nitrite can't be produced and the vessels remain in their current state. "Existing studies show that, exercise aside, antibacterial mouthwash can actually raise blood pressure under resting conditions, so this study followed up and showed the mouthwash impact on the effects of exercise."

The difference between good and bad bacteria

Remember, not all bacteria is bad. Your body needs a degree of bacteria present. When you've got an infection and take antibiotics to clear it, you often feel unwell for a period afterwards. This is because the antibiotics have absolutely wiped your body of all bacteria. It's a scattergun approach that works for curing illness, but for long term health and longevity, you need healthy bacteria too. This is definitely the case when it comes to your oral health. Read more from JOE