Whether you’re a beginner or an advanced fitness enthusiast, a Legs Bums and Tums (LBT) class, like the ones we run here at One More Rep, is suitable for all fitness levels. This class is usually around 30 minutes to an hour long and is designed to tone your legs, glutes and abs, help you get fitter, and improve athleticism. Training your core and lower body is a great way to improve muscle tone and maintain good balance and stability.