Instructors lead intense interval-based classes focused on building strength through functional movements rather than bulking up for looks

A ballet barre holds students steady as they perform deep poses paired with small, calculated movements

Supportive, motivating instructors encourage full-body results in variety of yoga and boot-camp classes, plus success and nutrition program

Kickboxing classes combine boxing and martial arts to help to tone and trim physiques; one-on-one training helps to refine style and results

BestFit classes blend anaerobic and aerobic exercise to oust flab, power yoga soothes and tones bodies, and CrossFit uses myriad workouts

Licensed Zumba instructors lead choreographed workouts of Latin dance moves set to thumping beats

Personal trainers backed by degrees in exercise science head group classes on functional fitness and yoga as well as private sessions

Vibrating plates cause intense muscle contractions for more efficient workouts in 10-minute spurts

High-intensity strength and cardio workout that changes daily and often incorporates kettlebells, medicine balls, and oversized tires

Challenge program intensifies workout with strength conditioning and nutrition plan; kickboxing classes increase endurance and flexibility