Strengthen, Lengthen, and Tone (SLT) with a group of friends during your own private class at any of SLT's NYC studios. There are locations on the UWS, UES, in Flatiron, SoHo, Tribeca, West Village, Brooklyn, and Queens.

SLT IS A 50-MINUTE, MUSCLE-QUIVERING, HEART-PUMPING, TOTAL BODY WORKOUT described as "if cardio, strength training, and Pilates had a baby."

The 50-minute sessions use the Megaformer, an incredibly effective machine that works your body in a uniquely intense way. The machine uses a system of springs and pulleys — and your own body weight — to work your upper and lower body with adjustable resistance.

You will receive a private introduction to the equipment, and you work through the class at your pace.