The dangerous side effect of pre-workout supplements


It's a supplement claiming to give you longer and harder workouts. Pre-workout is becoming more and more popular at gyms across the country, and right here in Oklahoma. But, like any supplement, it can come with some dangerous side effects.

Pre-workout is a supplement that can be used to boost your energy ahead of a good gym session. Many brands contain a large amount of caffeine. Somewhere to the tune of 200 to 400 milligrams.

"You have to be very cautious because every brand has a certain amount of caffeine in it some has more than others," said Scott Do, owner of Do Right Fitness.

Do not only takes the supplement himself, but half of his clients rely on it to get them through their workout. Clients like Scott Lewis.

"I've been taking them for several years now and the reason why I do take them is because it gives me energy and it gives me a pump when I'm working out," Lewis said.

Pre-workout, if taken in proper doses, can be a great option for an energy boost. However, if it's not used correctly can come with a multitude of side effects. It can cause vomiting, jitters, cramps, high blood pressure, and in rare cases, cardiac arrest.

"If you don't watch what you take it can make you feel sick, it can make you feel dizzy, you can feel your heart beating really fast," Do said.

Lewis claims he took the supplement and spend days without sleeping.

"Keep me up for two days straight. Can't sleep just amped up," he said.

Brian Rush is another one of Scott Do's clients. He said he lost nearly 100 pounds since beginning his fitness regimen. He claims pre-workout has helped to keep him on the right path.

"While you're working out you want to get the very best workout in that you can while you're here. Pre-workout helps you do that very thing instead of getting midway through and just tiring out it give you that extra boost," says Rush.

Scott Do tells FOX 25, that those who take pre-workout need to take several precautions. He says to always check and see how much caffeine is in the supplement, as the amount will vary depending on the brand. Do recommends starting with just a quarter or half of a serving. Finally, he says to never mix pre-workout with any fat burning supplements.

"Some fat burner has 350 or 400 mg of caffeine and something like this will have 500 mg so if you combine it you're accelerating 8 to 900 mg of caffeine. You'll get really sick," Do said.

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