And, increasing topspin at a recreational level to keep the ball in often causes increased pronation that can cause elbow injury. Todd also reviewed that torque equals force times the radius of the motion. At the same time, a wide-bodied racquet stabilizes the racquet head and decreases the torque. Therefore, generally speaking, the most torque would be from a longer racquet with a slim frame design. Here are some more points on shock and vibration.
Shock is the actual feeling of impact.
For example, returning a Sampras serve with a full swing can create a shock force of up to 400 pounds. Vibration is defined as the lingering post contact sensation that does not cause injury. First, a vibration dampener helps absorb high frequency string vibrations. Second, vibration dampeners affect the sound and the feel of hitting a tennis ball. But racquet head vibration is a low frequency sound vibration and is not affected at all by string dampeners.