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Plyometric Training for Sprinters
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The word plyometric is derived from the Greek word pleythyein meaning, "to increase". Plyometrics refers to exercises that enable a muscle to reach maximal strength in as short a time as possible (power) by eliciting the stretch-shorten cycle of a muscle fiber. This sequence of events begins by having the muscle stretch and therefore store elastic energy prior to firing. The harder and faster that the pre-stretch phase of the muscle is, results in a harder and faster muscle contraction and therefore a more powerful movement! Plyometric exercises are a vital component in aiding an athlete’s maximal speed and should be included in any conditioning program for sprinters.
 
Although plyometric training is not likely to result in injury, unsound, unsupervised programs could potentially result in shin splints and knee, ankle and lower back problems. These types of injuries are often a result of too many workouts per week, too many jumps per workout, incorrect form, jumping on hard surfaces, and using plyometrics at too early an age or without the necessary strength base. To avoid these injuries follow these guidelines.
 
  1. Preadolescent athletes should avoid plyometrics because of greater susceptibility to injury prior to puberty.
     
  2. Plyometrics should be postponed for athletes who do not have a sufficient base of strength. Avoid lower body plyometrics until the athlete is capable of Legs pressing 2.5 times their body weight and avoid upper body plyometrics until the athlete is able to complete 5 consecutive clap pushups.
     
  3. Athletes who do not respond well to instructions are also at greater risk of injury.
     
  4. Precede a plyometric workout with a general warm-up period consisting of walk-jog-stride-sprint cycles for one-half to three-quarters of a mile, followed by careful stretching exercises.
     
  5. Use footwear with good ankle and arch support, lateral stability, and a wide, non-slip sole.
     
  6. Perform plyometrics only on surfaces with good shock absorbing properties, such as soft grassy areas, well padded artificial turf, and wrestling mats. NEVER do plyometrics on asphalt or gymnasium floors.
     
  7. Boxes should be sturdy and have a non-slip top
     
  8. Depth jumping from objects that are too high increases the risk of injury, particularly to larger athletes, and prevents the rapid switch from eccentric to concentric activity. The average heights for depth jumps are 0.75-0.8 meters (27-30 inches). Athletes over 220 pounds should use heights of 0.5-0.75 meters (18-27 inches).
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