Aug 22 2021 Plyometric training to increase knee robustness from injury and improve performance.

Plyometric training to increase knee robustness from injury and improve performance.


Enhancing jumping ability following knee injury. Utilising Cal Dietz’s triphasic approach to training power

Restoring pain free movement is not the final stage in returning an athlete to sport. To deliver the best physiotherapy outcomes we must ensure that the athlete returns to compete at their best. Otago Nuggets Physiotherapist, Andy Armstrong @and1armstrong_training details how he incorporated plyometrics into his athletes rehabilitation plan to ensure that he returns to optimal performance on the volleyball court.

Harry was returning to Volleyball following a knee injury and found that although his knee health has improved, his jumping ability had decreased. Decreased performance following an injury is a key complaint of many people returning to sport. Loss of power is common following an injury (Maestroni et al., 2020) and this directly affects athletic skills such as jumping, sprinting, changing direction, pushing, pulling, throwing and kicking (Haff & Nimphius, 2012; Issurin, 2013; Young, 2006). Therefore, our goal was to improve both the injury-specific and performance capabilities of our clients.

Plyometric training techniques (jump training) may help protect injured tissues by increasing the athlete’s ability to coordinate movements and absorb and produce power, making the structure surrounding the injury more robust. In the clinic we have been utilising Cal Dietz’s triphasic approach to training power. Triphasic training is a periodised approach that incorporates eccentric (slow lowering), isometric (pause reps) and concentric (fast reps) phases. During his eccentric phase, Harry has already noticed improvements in his jumping ability and control of movement.

Incorporating Tri-Phasic training into knee rehab and jump performance

Our end-stage goal is to return Harry to his previous performance levels to play at his peak and reduce his risk of injury in the volleyball season.

Haff, G. G., & Nimphius, S. (2012). Training principles for power. Strength and Conditioning Journal.

Issurin, V. B. (2013). Training transfer: Scientific background and insights for practical application. Sports Medicine, 43(8), 675–694.

Maestroni, L., Read, P., Bishop, C., & Turner, A. (2020). Strength and power training in rehabilitation: Underpinning principles and practical strategies to return athletes to high performance. Sports Medicine, 50(2), 239–252.

Young, W. B. (2006). Transfer of strength and power training to sports performance. International Journal of Sports Physiology and Performance, 1(2), 74–83.

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