HIIT

Let off steam and release some essential endorphins with these HIIT, yoga and dance classes. Your body and mind will thank you.
“I am in the best physical shape I have ever been in," said one fan of high-intensity interval training.
These quick routines will help whittle your middle.
"It's a little bit of step, a little bit of weights. It's great music. It's fun. It's hard but it's fun."
This efficient exercise will get you fit, but it's really intense.
Before you sign up for HIIT on ClassPass, read this.
This energizing high-intensity interval training (HIIT) routine and super motivating playlist, designed by a master fitness trainer, will invigorate you—even if you're not a morning person.