It is all in the Science
Developing acceleration is actually dependent on deceleration abilities. A true plyometric requires an eccentric (stopping action / muscle lengthens) muscle contraction immediately followed by a concentric (starting power phase / muscle shortens) muscle contraction. To develop power and acceleration, it is necessary to couple the eccentric and concentric contractions, essentially eliminating any delays.
The mechanisms behind this phenomena include the stretch reflex, elastic energy, neural activation and proprioception. The PowerPlyo is designed to stimulate all three.
Stretch Reflex: Your muscle spindles detect changes in muscles length. During a fast eccentric loading (landing a lateral jump), the stretch on the muscle causes a reflex contraction in the opposite direction.
Elastic Energy: When a muscle is quickly loaded during a fast stopping action, elastic energy is created. This is potential kinetic energy. If the athlete is well trained and can immediately move into the concentric power phase, she does so with added kinetic energy behind her acceleration. But if the eccentric loading is slow, unstable or she does not possess enough strength and power to couple right into a concentric power phase, the potential kinetic energy dissipates as heat and no additional power is gained. Training is key here.
Neural Activation: With dynamic, multi directional jump training, the muscles are potentiated, increasing muscle recruitment, leading to stronger acceleration phases.
Propriocepion: Your muscles, tendons and ligaments contain receptors and mini brains that sense body position and changes in balance, and compute the optimal movement response. Perfect landing and perfect balance is required to gain optimal concentric power and to train safely and injury free.
The PowerPlyos System emphasizes power development through an array of closed kinetic chain strength and multi direction dynamic power drills. Whole body functional movements such as vertical jumps, hops, triple flexion and extension, lateral movement and rotation can challenged. Introduce a medicine ball into the jumps and steps, and you now can work the upper body as well. This allows you to complete the power chain originated in the legs and hips and following through with the shoulders, chest, and arms.
Plyometric training can be designed to cover three regions of the body: lower, upper, and trunk.
The specific sport, position, time of season, schedule, and athlete maturation and training history will drive exercise prescription. Conditioning coaches and personal trainers should be consulted to determine exercise intensity, frequency, recovery, volume, velocity, program length, and progressions.