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Glossary of Terms
- Acceleration
- The rate of the increase in the speed of a mass. For athletes, this can generally only be done for 6 -7 seconds.
- Agility
- The act of organizing, with control, varieties of movements and directions.
- Biomechanics
- Most efficient movement skills possible to produce and generate force. These can be general or sport specific.
- Concentric
- Shortening of a muscle.
- Dorsiflex
- To load the ankle before contact with the ground by pulling the toes up toward the shin to a maximal flexed position.
- Eccentric
- Lengthening of a muscle.
- Impulse
- The moment of change of muscle contraction from eccentric to concentric or the reverse.
- Maximum Velocity
- The maximum rate of speed any mass can travel.
- Physiologic
- Chemical makeup of the body's stored energy to facilitate muscular contraction. There are three types of energy systems: anaerobic (0 to 15 sec), lactate (10 to 120 sec) and aerobic (long term sustained movement).
- Plantarflex
- To fully extend the ankle joint at take off from the ground. The act of pushing away from the ground.
- Plyometric
- Any exercise that enlists a stretch reflex of a muscle system. Generally there is greater stress applied to the eccentric phase of muscle contraction followed by a rapid change to concentric contraction generating greater force production.
- Plyoquicknic
- Low impact exercises that enlist repeated very fast movement with a limited range of motion.
- Powermetric
- Greater range of motion exercises that enlist maximal effort and intensity. Powermetrics generally put much greater stress on the muscular system.
- Quickness
- An impulse action to any stimulus for a short distance or time.
- Speed
- The rate at which a mass moves.
- Triple Extension
- Simultaneous maximum extension of the hip, knee, and ankle joints.
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