The cardio-respiratory system consists of the cardio vascular system (heart and blood vessels) together with respiratory system (lungs and air ways). These systems work to transport oxygen to the muscles and organs of the body and remove waste products including carbon dioxide.
1)
Overload PrincipleTo make improvements in your fitness you need to overload your body. You need to stress or challenge the bodily system (aerobic/musculoskeletal) beyond what it is used to.
2) Specificity Principle
Your exercise program must be specifically related to your training goals.
3)
Individuality Principle
"Everyone is different, which means everyone is special)
4) Reversibility Principle
Not being as good as something as you used to.
A doctor, a nurse, or for small children, a pediatrician. <span />
