The Gym Class, Reinvented

By Ryan Halverson, DETAILS

Health clubs and trainers are embracing the intense half-hour session. Here are the best group-fitness options.

PrevNext

photos 1 – 7 of 8

• • 
  • 
  • 
  • 
  • 
  • 
  • 

photo 1 of 8

Next

Equinox

CITY: New York, Chicago, Los Angeles

CLASS: ViPR


What distinguishes this class is its primary tool, a large rubber cylinder (known as a ViPR) that is said to be the "evolution of free weights."

More from DETAILS.com: