What it used to be: Lotte Berk Method. Originally developed by the once famous European dancer Lotte Berk in the late '40s, the Lotte Berk Method is a unique fusion of ballet, Pilates, and sculpting. The technique made its way to the U.S. in 1971, when...

What it used to be: Jazzercise. Most traditional dance classes, with their stop-and-start choreography and necessary skill mastery, are just too complicated for the average exerciser to follow along and get a good workout. But that changed in 1969, when...

What it used to be: Hi/Lo Aerobics. A popular workout in the 70s that really hits its stride as a favorite 80s workout, hi/lo (which stands for high- and low-impact) aerobics classes taught choreographed, dance-like routines with moves like grapevines, step...

Stretching is one of the best ways to keep your muscles healthy. Stretching regularly will help maintain your muscle strength and increase your flexibility. The more flexible you are, the better it is for your joints. Keeping muscles and joints in top condition helps...

Looking to re-up your motivation, try one of these best workout apps for a new program or guide to follow. Ready to sweat? Just hit play on these workout songs. Harder, Better, Fatster, Stronger — Daft PunkGo Girl — Ciara and T-PainFeelin' Myself —...

Rock on with your spandex on with these old school and new school rock workout songs. These timeless exercise options, including 80s workouts and 90s dance trends, are still effective and fun. Eye of the Tiger — SurvivorWe Will Rock You (Remastered) — QueenSmells Like...