PHILADELPHIA (CBS) — Power bands are the newest fitness trend. Hollywood swears by them, and athletes say they’re amazing. 3 On Your Side Medical Reporter Stephanie Stahl has more on the new rage.

It’s a silicone wrist band, with a mylar hologram. They’re worn by professional athletes like David Beckham, celebrities like Leonardo DiCaprio, even professional trainers and casual athletes.

“For me I noticed, I did feel a little more stable in my yoga class,” said Sharon Liao, Health and Nutrition Editor with Self Magazine.

“I had an open mind and tried it on, and it helped me out a little bit,” said Cedrick duJon, a Personal Trainer.

The maker claims the power band emits a frequency that works on the body’s natural energy flow, which can help improve balance, strength and flexibility.

“You do need to be a little bit skeptical about it. If you run a 10 minute mile, you’re not going to run a five minute mile, you might notice a little effect,” said Sharon.

Could it be enough to get your body ready for Victoria’s secret lingerie? Maybe not. But many feel a power boost can improve fitness to help bodies look better.

And while there is no scientific data to prove power bands work, the potential for increased performance has tempted millions to try it.

“Our feeling is that you’re not ingesting anything. There aren’t really any potential side effects. And even if it’s just a placebo effect, if you think it’s helping you be fit and healthy then go for it,” said Alexis Wolfer, with thebeautybean.com.

As for the lack of scientific data, company officials say, “From its inception, Power Balance has lived and thrived in the ultimate testing environment, the real world.”

And a competitor EFX says, “We are currently reaching out to several reputable third party research teams.”

“At the end of the day, you’re the best study. If you choose it, and it works for you, that’s the best thing you could hope for,” said Robert Telli, who wears a band.

So what’s the power in these bands? Power Balance says they’re treated with energy waves at specific frequencies, which can tap into the body’s energy flow.

They cost about $30.

Reported By: Stephanie Stahl, CBS 3