Sure, SoulCycle and CorePower Yoga are all the rage, but whatever happened to Jazzercise, Tae Bo and the ThighMaster?

They haven't disappeared into the abyss. They're among the old-school workout trends that are still around, just in modern form.

Your auntie's favorite Jazzercise celebrated its 50th anniversary this year, a reminder that just because a workout trend is "old" doesn't mean it isn't fun and effective.

Ian Smith, bestselling author of "SHRED: The Revolutionary Diet" and chief medical adviser at Jetson, a probiotic company, says old-school fitness workouts such as spinning and Tae Bo are more applicable and beneficial than ever. He suggests modifying them into high-intensity interval workouts for an even better burn.

"Instead of doing an exercise in a steady state manner, one oscillates between high-burst exertion and low exertion/rest for shorter periods of time," Smith tells USA TODAY. "This increases the length of caloric burn as well as fat burn."

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Smith says workouts such as step aerobics and Jazzercise are a great way for people to ease into an exercise routine.

"Older fitness trends are a great way for people who have been sedentary for a while or who are largely deconditioned," Smith says. "These exercises are 'oldies but goodies' and should not be discounted or frowned upon because they don’t involve the latest technology or training methods."

Classes such as step aerobics, spinning and Jazzercise provide great cardio exercise and have even evolved into the modern trendy classes we love to frequent.

Smith reminds us SoulCycle is the modern version of spinning and CrossFit is what Tae Bo was in the '90s.

Amanda Tress, author and founder of "FASTer Way to Fat Loss," says Tae Bo, step aerobics, spinning, dance cardio, hula hoop and even products such as the ThighMaster and NordicTrack get people excited about working out.

"These old trends are great because they burn calories, increase cardiovascular strength and build muscle (which is important for increasing metabolism)," Tress says. "Many of these trends are also social, so they get people out the door for a workout when they otherwise may have skipped that day."

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On the flip side, some people's favorite old-school workouts can be done in the comfort of home by following along to a video, Tress says. It's easy to grab a hula hoop and get to work in the middle of your living room or YouTube a step aerobics workout while your dinner is cooking in the oven.

If you'd like the more communal feel of working out with other people, Jazzercise offers classes around the country.

Ultimately, the best form of exercise is the one you're going to actually do, Tress says. If taking a Jazzercise class will get you up and moving more than a gym membership, then do that.

"Going to the gym is a great option, so I wouldn’t encourage anyone to stop if that’s what they love, but the gym isn’t necessary for a great workout," Tress says.