At Hot Fitness, transformation can begin in midair. That is, if you attend the trampoline fitness classes. Participants bounce their way to stronger muscles and less flab at the fun, fast-paced class. Another workout that defies gravity: TRX suspension training. Though, there are also many classes that work with gravity. For instance, hot yoga, Pilates, and barre, real Ryder spin class, and Zumba, among many others.