Life Time Classes on Instagram: "The making of GTX – a Class Collection brand at Life Time. 💪🏃‍♂️ GTX Classes include: - GTX GTX FOCUS: SGT WHAT IS GTX: GTX is the ultimate 50/50 cardio & strength experience. Heart-rate based interval training, resistance coaching, and a comprehensive weekly plan provide the right formula of exercises to keep you improving your overall fitness. Expect to use a treadmill for cardio and functional strength work using dumbbells, kettlebells, benches and resistanc