In the picture on the right, notice that the same woman weighs exactly the same but looks totally different. How can this happen you might ask? The answer is in her body composition. I speak to a lot of people on a regular basis that comment that they still weigh the same as they did when they were in college. They also notice that they are more tired and feel a lot softer than they used to. It is all about their body fat to muscle ratio.
First of all, a little bit of explanation about the difference between fat and muscle. Contrary to popular belief. muscle DOES NOT weight more than fat. Muscle is more dense than fat. So, what that means is if you take the same amount of fat and muscle... say one cup full, the cup with the muscle (meat) will weight more. If you keep adding fat until you have the same amount in weight, there will be a considerable amount more fat than muscle. That is why of the two photos the one on the left has more "fluffiness". the same weight in fat takes up more space.
So how do we replace the fat in our bodies with muscle? Well actually You are not really replacing it. And Fat doesn't turn to muscle nor muscle to fat as some believe. In the video below I explain in detail how metabolism is affected by the amount of muscle on your body.