High-Impact: Acute Injury Risk It is not suitable for all ages or populations. It is not suitable for athletes who have persistent injuries. Low-Impact: No major drawbacks except it may not be as effective in improving your running time. Plyometrics are exercises that use rapid limb movement to generate force. They include jumpings and landings, bounding, and skipping. Although they can improve your ability to rebound from a collision, do not perform plyometric movements if you have an acute injury or existing condition (such as arthritis). Overuse injuries may occur when an activity is done without proper recovery periods. For example, runners may be at risk for stress fractures of the foot due to the repetitive nature of their activity. If you are already prone to injuries, consider reducing your level of participation until your body is healed enough to handle the stress of the activity. Plyometric training is useful for improving explosive strength and power. It has been shown to increase muscle mass and bone density, which can help prevent osteoporosis later in life. The most common form of plyometric exercise is jumping. You can vary the type of jumps used in plyometric workouts to challenge different muscles and increase overall effectiveness.