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.
Direction of the racket face. A good badminton grip allows you to control the angle of the racket face, so that you can hit the shuttlecock in the direction you want. For straight shots, the racket face will finish parallel to the net on impact (in other words, it faces forwards on impact).