Zaggora Hotwear May Help You Burn More Calories While Working Out

ABC News' Rebecca Jarvis reports the latest news on the potential benefits the clothing line may have on your workout.
2:52 | 08/04/15

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Transcript for Zaggora Hotwear May Help You Burn More Calories While Working Out
investigates and this morning taking a hard look at a brand of workout clothing that claims it can make you burn more calories by making you hotter. Certainly selling like hot cakes with more than a million units sold worldwide so ABC's Rebecca Jarvis tried it out with the help of an expert. Reporter: Zaggora hotwear, the trendy fitness wear line with its own youtube channel, one outfit can cost up to $130, so what makes it different than all the rest? This company actually claiming on its website that exercising in zaggora hotwear can increase calorie burn. "Gma investigates" wanted to check it out working with exercise physiologist Pauly Demille at the hospital for special surgery in New York to help us see would we burn more calories wearing zaggora clothing. If you had somebody doing the same exact work and all you did was change what the person was wearing, you could get an idea of whether the clothing might have any impact. Reporter: I'm wearing standard workout clothing. My producer Stephanie is in zaggora. First we put on the headgear. The most accurate way of measuring calories. Reporter: And after a warm-up a 30-minute jog at a constant speed. The next morning we repeat the same workout. But this time I'm wearing the zaggora so what did we find? One case really no difference whatsoever. Reporter: She says I actually burned three calories less in zaggora and our producer burned 17 more calories in zaggora. An 8% difference. Why might that be? Stephanie was adjusting things a little bit more. So every movement counts, the other possibility obviously is something to do with the clothing but that, you know, remains to be seen. Reporter: On their website zaggora cites three studies where more than 50 women burned on average between 6% and 11% more calories in zaggora clothing but exercise physiologist bill sakala says their claims could be confusing to consumers. You have to look at the actual Numbers thanselves. The number of calories burnt between using zaggora hotpants versus other athleticwear is very small. Reporter: We sent our findings to zaggora and they said "What matters in our business is not opinions but data." And added "Even if it is accurate it is really not possible to clean collude on the back of each person doing something different." If you're looking to drop major pound, think twice. When it comes to zaggora hot pants it's very much a case of wishful shrinking. Reporter: Rebecca Jarvis, ABC news, New York. And there is one thing we know for sure. Get out and work out.

This transcript has been automatically generated and may not be 100% accurate.

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