It always amazes me that FITNESS is a multi billion dollar industry... Yet a solid, concise and universal definition of fitness is difficult to nail down.
Simply ask a person participating in a physical workout plan, leanbean fat burner amazon (Read Homepage) as well as someone in the health industry for that matter, to provide you with a clear definition of fitness.
You will more than likely be welcomed with the "deer caught in the headlights" stare accompanied by absurd stammering.
If you do get an answer, it will most likely be slanted toward the specific capabilities of an individual asked.
For example...

A marathon runner is going to define fitness in terms of muscular and cardiorespiratory endurance... A power-lifter will define fitness in terms of absolute strength... A bodybuilder is going to define fitness in terms of muscle size as well as definition... etc.
But the overwhelming majority of people participating in a physical exercise program aren't professional athletes worried about the improvement of only one physical ability.
Therefore, basing the definition of yours of fitness on a single specific physical skill does not lead to a universal definition of health.