The kBox and the kPulley target many important aspects of developing a Tennis player’s strength and are already being adopted by high-level players.

With flywheel training on the kBox and the kPulley tennis players have the tools for improving sprint speed, change of direction ability, and hitting power.


In Tennis, the kBox and the kPulley are tools for training many aspects of the player’s physique. They are used for lower limb work to improve starting strength and speed in change of direction, by way of squats, split squats, and lateral squats for example. Overloaded actions targeting the end range eccentric strength are excellent both for acceleration and overall speed. Upper body and core drills are important both for performance and hitting power but also to improve shoulder health through various drills such as rotations, rows, and pulls that may involve hip movement.


Studies have shown change of direction performance has been strongly linked to eccentric strength in a study involving elite female basketball athletes (Spiteri et al 2014) and studies using flywheels have shown acute and chronic adaptations to flywheel training that improved both linear and acceleration speed and change of direction performance (Hoyo et al 2015, Hoyo et al 2016).

The Exxentric Harness reduces a lot of the torque and stress on the lower back which makes the training very efficient, accessible, and safe for athletes without a specific gym background. Using the kMeter makes it easy and safe to perform and monitor your athletes.

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