Transthyretin amyloidosis is a slowly progressive condition characterized by the buildup of abnormal deposits of a protein called amyloid (amyloidosis) in the body's organs and tissues.
If you play tennis, you may be familiar with the different racket customizing choices you have -- common choices include string type, gauge and tension. Not so common is an inexpensive device called a shock absorber or vibration dampener. These devices have no impact on your performance, but some players can't play without one. It's a personal choice, and if you do use a dampener, its placement must comply with the rules of the International Tennis Federation.
Rather, it simply proves that when the racquet head is behind the wrist at the moment of impact, that there is less likelihood of tennis elbow pain. If you have pain when hitting overhead smashes, however, you may want to switch to hitting these with a forehand grip.