Do not mistake muscularity with health. While the work required to attain strong muscles may well lead to good health, a fit-looking body does not necessarily equate an optimally functioning body.
Unfortunately I have known plenty of bodybuilders who, while looking like a million bucks, were often out of breath and tired. You see, they placed the attainment of muscle mass above all else, to the detriment of the rest of their system.
By all means, I encourage you to get into the gym and aim to get muscular, toned, lean – however you wish your body to look. However, never lose sight of the fact that our bodies are intricate machines, and that each part has a symbiotic relationship with its counterparts. Whether it’s eating or training, make sure that what you are doing benefits the whole rather than only some of its parts.