Pro fighters & certified instructors lead students through fitness or martial-arts classes that tone muscles & bolster confidence

Salsa, Zumba, yoga & pole-dancing courses hasten heartbeats in graffiti-covered dance-fitness studio

60-minute boot-camp classes challenge with obstacle courses, weight exercises, Pilates & tae bo; online meal planning conveys eating tips

Certified trainers help students create lean muscles with joint-friendly strength-training moves that boost metabolism

Fitness-savvy instructors lead all levels of students through eclectic assortment of movement-based classes, including yoga, Pilates & dance

Experienced trainers lead students through strength-training circuit designed to boost metabolism during one-on-one session

Hybrid fitness technique unites core conditioning, yoga, orthopedic exercise & neutral spine positions to tone muscles & improve alignment

Computerized exercise machines automatically customize workouts to suit each user's fitness goals & body type

10 styles of boot camp combine indoor routines that use plyometrics, resistance & core strengthening with outdoor sprints up streets & hills

Motivating trainers chisel bodies with constantly changing series of exercises in group-style training sessions