Isometric, Isotonic, MMF, TUT

The three main types of isometric exercise are isometric presses, pulls, and holds. They may be included in a strength training regime in order to improve the body’s ability to apply power from a static position or, in the case of isometric holds, improve the body’s ability to maintain a position for a period of time. Considered as an action, isometric presses are also of fundamental importance to the body’s ability to prepare itself to perform immediately subsequent power movements. Such preparation is also known as isometric preload.
An isotonic exercise is one where your muscles are placed under a certain amount of tension, which remains the same as the muscle contracts and goes through a full range of motion.
Maximal Muscle Force (MMF) refers to the amount of force that a muscle can apply to a resistant. By forcing the muscle to apply maximal force more muscle fibers are called into action thereby increasing muscle size and strength.
Time Under Tension (TUT). As a muscle is forced to contract at MMF over a given time it must become stronger. The muscle therefore must activate more muscle fibers.
By combining these four methods we can achieve great results in less time than by resistance training alone.