The Scientific Study

Like Donnay rackets they prevent arm injuries

The results of an independently conducted “Racquet Shock & Vibration” study dramatically show that solid-core tennis frames produce less shock and vibration on initial contact and 4 times less shock and vibration time after contact than the racquets of the four main brands.

The study was conducted by an independent third-party testing facility located in Shallotte, North Carolina, which specializes in testing medical devices and sports equipment.

OrthoKinetic Technologies, LLC is an important regulatory and consultancy firm specializing in regulatory and testing strategies for medical devices and sports equipment.

In the study, Donnay rackets dampened vibrations 4 times faster with less vibratory forces than other models tested at the moment of impact with a standardized force.

Both professional and recreational players receive repetitive transmissions of force and vibrations to the arm tissues by hitting the ball, and part of the shock is transmitted to the arm. The greater the prolongation of shock and vibration, the greater the risk of tissue injury.

In the study, the solid-core rackets vibrated for less than 0.2 seconds on contact with the ball, compared to an average of 0.7 seconds for the other models tested.

This means that a player who hits 180 balls in a typical tennis match is subjected to more than 111 seconds of vibrations with other brands, compared to just 32 seconds with Donnay.

Having a shock needle in the tendon for 2 minutes can cause serious damage especially to children and minors whose tendons are not yet fully developed.

The extent of the frame vibration transmitted to the arm holding the racket largely depends on how well it is cushioned. The solid-core Xenecore construction and production process acts as a super shock absorber to eliminate most harmful vibrations.

In the old wooden rackets, the vibration quickly disappeared because it was dampened by the bending of the solid wood, but the new stiffer, lighter and hollow conventional frames do a little work of damping the vibrations, so they transfer this shaking to the arm that can damage the elbow, wrist, forearm and shoulder.

The longer the vibration, the more stressed the tissues are. This constant stress is like a coat hanger is broken by folding it back and is worth the effort. Eventually, the tissue can become fatigued causing localized inflammation, micro tears and micro injuries, even without any tremendous force.

Empty rackets with their poor cushioning properties cause pain (think about hitting a baseball with an empty aluminum baseball bat on a cold day).

For years, the tennis industry has blamed arm injuries with low impact techniques, conveniently moving the racquet design exam, but heavy, stiff racquets with balance shifted to the head are more to blame.

While conventional rackets have become lighter and stiffer, the number of players suffering from arm and elbow pain has also increased dramatically.

The cause is no longer mainly related to mechanics, but rather to the equipment itself.

The study is of great importance to all players and the tennis industry as half of the players are currently experiencing some form of arm pain and are looking for rackets that can minimize repeated long-term exposure to prolonged vibration and stress transfer to the human tissue.

In short, if you are trying to hurt, you are not playing well and you are not having fun.

Donnay rackets filled with Xenecore are the solution that will keep you in the game, without injuries.

Studies in Pdf

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