Increase strength and endurance; high-energy classes can burn up to 1,275 calories in 50 minutes

Resistance bands pit exercisers against gravity and their bodyweight for a cooperative muscle workout that tones abs, legs, and arms

Classes mix aerobic and strength exercise with kickboxing, cycling, and resistance moves; trainers customize goal-oriented group sessions

The 40,000-square-foot workout facility has a women-only workout area, dozens of group classes, a steam room, and a sauna

Cardio and strength equipment whir near TVs and trainers draft custom workouts in family-friendly gyms

Certified instructors teach core-strengthening mat Pilates, hatha yoga, and Zumba’s Latin-dance aerobics

Students build muscle and burn fat during intense Les Mills group fitness classes, performing dance, combat, and cardio moves

With sessions for all ages, instructors lead engaging workouts that combine strength-training exercises and cardio intervals

Zumba is a fun dance-fitness routine set to upbeat Latin rhythms; tribal-fusion belly dance brings folkloric dances into the 21st century

Experienced instructors lead group workouts that melt calories, boost energy levels, and sculpt muscles