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  2. Fitness

Boosting Your Intake Of This Vitamin Could Make You Fitter

But there's a catch. - by Lucy Bode
  • 07 Nov 2018
Boosting Your Intake Of This Vitamin Could Make You Fitter
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We’re all aware that vitamin D is tres important for our health. 

Too little of the stuff can wreak havoc on the immune system, leaving us exhausted, excessively sweaty and generally down in the dumps (and that’s just the start). But what if we told you it has a huge impact on our fitness levels, too?

Intrigued? Allow us to explain.

Researchers compared the vitamin D levels and cardiorespiratory fitness levels (how efficiently the heart and lungs supply oxygen to the muscles during exercise) in nearly 2,000 adults across the US.

They found that the participants in the top quartile of vitamin D had 4.3 times higher cardiorespiratory fitness levels than those in the bottom quartile. This meant they could work out harder and for longer than their peers.

RELATED: These Are The Top Fitness Trends For 2019

beach run
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“The relationship between higher vitamin D levels and better exercise capacity holds in men and women, across the young and middle age groups, across ethnicities, regardless of body mass index or smoking status, and whether or not participants have hypertension or diabetes,” explained Dr Amr Marawan, an assistant professor of internal medicine at Virginia Commonwealth University.

“The association was strong, incremental and consistent across groups. This suggests that there is a robust connection and provides further impetus for having adequate vitamin D levels which is particularly challenging in cold, cloudy places where people are less exposed to the sun.”

As for the reason why, the authors noted a few contributing factors: firstly, the nutrient boosts the production of muscle protein and aids in the transportation of calcium and phosphorus on a cellular level. In addition, vitamin D may affect the body’s makeup of fast-twitch muscle fibres, which can “improve aerobic fitness.”

It’s worth tabling, however, that the study was observational and didn’t show a cause-and-effect relationship. Which means that while it’s possible that having high vitamin D improves fitness levels, it could merely be that a person with high fitness levels simply spends more time exercising outdoors – and is higher in vitamin D as a result.

RELATED: 5 Unexpected Signs You're Not Getting Enough Vitamin D

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Lucy Bode
Lucy Bode
Lucy is Women Health’s digital editor, social media specialist and the go-to girl for all things holistic wellness. Her background as a journalist and passion for food, fitness and integrative medicine has led her to write for some of Australia’s leading publications over the course of her career.

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