Exercise: What It Can and Cannot Do

Just do more exercise” remains one of the most common recommendations given for weight loss and better health. While movement is essential, treating exercise as a simple calorie-burning solution often leads to disappointment when results fall short of expectations.

The Advice: Do More? Exercise is a clear, physiology-based medical guide that looks honestly at what exercise actually does inside the body. Written by Dr Samir Contractor, a laparoscopic and bariatric surgeon, the book explores energy expenditure, metabolic adaptation, muscle and mitochondrial function, appetite responses, and the realistic role of physical activity in fat loss and long-term health.

It separates evidence from slogans, showing both the powerful benefits of regular movement and the limits of relying on exercise alone. The goal is to help readers and clinicians place physical activity in its proper physiological context—neither over-promising nor under-valuing it.