Answer:
Principle of overload : By exposing our body to higher level of strength, our body will developed the capability to handle it better in the future
Principle of progression : After being used to a specific limit, our body can surprise that limit and get used to higher level of limit, which make us stronger
Principle of specificity : A person should only train the body part that they needed (soccer player should focus on kicking power rather than punching power)
Explanation: