If someone try to say that fitness - it's easy, it's like dancing, ask him what about the dance for an hour without a break to rest, so even with a dumbbell in your hand? Sure, try it out once more do not try to spread the simplicity of fitness.
Fitness - a set of exercises that are most beneficial to the body's muscles, ligaments, as well as cardiovascular and respiratory system. Exercises are performed on the rise, and for a long time kept at a maximum for a trained person. The criterion can be both speed and specificity of any exercise.
Why do that? Yes, because if we want our body was in good shape, and body fat slowly but surely disappear, we need to work on our hearts seventy percent of its maximum load for a certain period of time. Only in this case the body receives the load, which leads to the desired result.
To an untrained person this may seem real horror, especially in the first class. But the more you do, the more benefit it brings you. And over time, the test turns into joy when day after day you see in the mirror of his award - the body of your dreams!