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Last Updated: Sep 15, 2017 - 4:49:58 AM
Research Article
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Beetroot Juice enables people to exercise longer

Dec 22, 2010 - 12:44:01 AM , Reviewed by: Dr. Sanjukta Acharya

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[RxPG] Beetroot juice has been one of the biggest stories in sports science over the past year after researchers at the University of Exeter found it enables people to exercise for up to 16% longer. The startling results have led to a host of athletes – from Premiership footballers to professional cyclists – looking into its potential uses.

A new piece of research by the university in conjunction with the Peninsula College of Medicine and Dentistry has revealed the physiological effects of drinking beetroot juice could help a much wider range of people.

In the latest study, published in the Journal of Applied Physiology, the researchers looked at low intensity exercise and found that test subjects used less oxygen while walking – effectively reducing the effort it took to walk by 12%.

Katie Lansley, a PhD student from the university's Sport and Health Sciences department and lead author of the study, said: "As you get older, or if you have conditions which affect your cardiovascular system, the amount of oxygen you can take in to use during exercise drops considerably. This means that, for some people, even simple tasks like walking may not be manageable.

"What we've seen in this study is that beetroot juice can actually reduce the amount of oxygen you need to perform even low-intensity exercise. In principle, this effect could help people do things they wouldn't otherwise be able to do."

When consumed, beetroot juice has two marked physiological effects. Firstly, it widens blood vessels, reducing blood pressure and allowing more blood flow. Secondly, it affects muscle tissue, reducing the amount of oxygen needed by muscles during activity. The combined effects have a significant impact on performing physical tasks, whether it involves low-intensity or high-intensity effort.

So far the research on the impacts of beetroot juice has only been carried out on younger people who are in good health, but the researchers believe there is no reason why the effects of beetroot juice wouldn't help others.

"While we haven't yet measured the effects on the elderly or those with heart or lung conditions, there is the potential for a positive impact in these populations which we intend to go on and investigate further," Katie Lansley added.

Beetroot juice contains high levels of nitrate. The latest study has proved that this is the key ingredient which causes the increase in performance, rather than any other component of the beetroot juice.

Professor Andy Jones, the senior scientist on the study and a pioneer of research into beetroot juice, said: "In this study, we were able to use - for the first time - both normal beetroot juice and beetroot juice with the nitrate filtered out. Test subjects didn't know which one they were getting. The drinks both looked and tasted exactly the same. Each time the normal, nitrate-rich juice was used, we saw a marked improvement in performance which wasn't there with the filtered juice – so we know the nitrate is the active ingredient."




Publication: Journal of Applied Physiology

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 About Dr. Sanjukta Acharya
This news story has been reviewed by Dr. Sanjukta Acharya before its publication on RxPG News website. Dr. Sanjukta Acharya, MBBS MRCP is the chief editor for RxPG News website. She oversees all the medical news submissions and manages the medicine section of the website. She has a special interest in nephrology. She can be reached for corrections and feedback at [email protected]
RxPG News is committed to promotion and implementation of Evidence Based Medical Journalism in all channels of mass media including internet.
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