History
What is gladiators, soldiers, and the Olympics in Ancient Greece?
What is 50%?
This refers to the necessity to improve strength and endurance by overloading the system with appropriate activities and then allowing it to recover.
What is the Overload Principle?
This refers to the pain and dysfunction felt in the body after high-intensity exercise.
What is Delayed Onset Muscle Soreness (DOMS)?
This person was primarily responsible for the modern resurgence, after they published "Sports Massage", the book for athletic massage.