Fitness is the ability to make muscular effort for the physical activities without getting tired but improving the physical condition. Fitness is about: how to cope with the daily tasks dynamically, how to obtain energy to enjoy various activities, how to react immediately to the immediate situations and the ability to face and keep control over the stress and generally, how to bear with the situations where a physically non-capable person could not. Fitness is the basis for a good physical and mental health!
Good cardiopulmonary condition
It's the ability of the heart, the blood vessels and the lungs to transfer oxygen and nutrients throughout the body, especially in muscles and tissues during the exercise. Being in good cardiovascular condition, is directly related to health and the ability to enjoy long-time activities (swimming, jogging in the countryside, playing with our kids). Aerobic exercise improves the strength of the heart and protects us from heart diseases.
Muscular/skeletal condition
An adequate muscular strength and stamina are necessary to improve our performance during exercise. The flexibility allows us to perform movements with normal range protecting us from injuries.
Muscular strength is the maximum power that a muscle or a muscular group can produce for a short time (for example when lifting a heavy object from the floor to move it right beside).
Muscular endurance is the ability of a muscle or muscle group to perform a repeated exercise which includes resistance, for an extended duration (for example when holding shopping bags from the supermarket on your way to home).
Flexibility helps joints to allow normal movements by stretching the muscles (when you bend with ease to get something off the floor, when you scratch your back or when you tie your shoes).