 Better Life with Dr. Samjay Gupta. You ever feel like you're stuck in a workout rut? Happens to the best of us. But a CNN fitness contributor, Dana Santus, recently told me, pushing harder is rarely the answer. In fact, the key to progress in your workouts is more likely doing less, not more. Dana said, remember, you should mix up your routine because your body naturally adapts to repetitive movements and that leads to diminished returns.