08/21/2012 07:52 am ET Updated Dec 06, 2017

Fix Your Form: How To Do The Perfect Bridge On A Ball

If you don't know your way around a weight room, heading to the gym can be intimidating -- and even dangerous. But paying attention to a few simple rules of proper technique can make you slimmer, stronger and healthier all over.

That's why we asked John Romaniello, trainer, author and founder of Roman Fitness Systems to show us what's what when it comes to strength training.

He'll be helping us tackle some of the most common mistakes we all make while building muscle, plus giving us tips and tricks for better form. This week, we're perfecting the glute bridge on a stability ball.

The Faux Pas: "Most people let the hips sag to the ground rather than keeping them elevated," says Romaniello, similar to how we often slack off doing a regular bridge. And that means you probably won't see the results you're hoping for. "This reduces tension and recruitment of the glutes and hamstrings, which are the muscles you're trying to target."

The Fix: "Keep your hips in the air by contracting your core muscles and glutes," he says. And when he says "in the air," he really means it, as you can see here.

Tell us how it goes in the comments below, and be sure to check back over the following weeks to fix your form on common gym machines.

Check out more in our Fix Your Form series below:

Fix Your Form

Photos by Damon Dahlen, AOL

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