All humans are not created equal people. For example, a thoroughbred race horse will respond to training and conditioning differently than a regular work horse. An individual's response to good diet and exercise will be dependent on a number of different factors: genetics will play a role of course, age, gender, and previous fitness level. If a person has been an athlete their entire life they may adapt quicker to a training regime than say someone who is just getting started.

To answer the question bluntly, some people will just build muscle mass more efficiently than others. I know, I know... it's not fair. But life isn't fair and people have to keep the bigger picture in mind. Everyone can achieve their goals if they remain consistent and execute the whole plan (rest, eating clean, exercise, water). It may be over a longer time line for some, but that should not matter. The benefits alone to a healthier lifestyle should be reason enough, not a mean to an end, but an accomplishment in itself. Keep working hard people!! For those of you whose goals are solely in the name of just looking good, remember that good looks are a result of healthy living. Quick results usually go away as abruptly as they appear.