ARTICLE ABOUT EXTREME ISOMETRICS

Here is a short article explaining the concept of using extreme isometrics to increase muscular endurance and core stability - http://www.livestrong.com/article/411660-what-is-an-extreme-iso-exercise/

GREAT ISOMETRIC EXERCISE FOR FOREARM AND WRIST STRENGTH

Here is a great isometric exercise that you can do for forearm and wrist strength. I like to call it the PENNY PINCHER. Grab a spring-loaded handgrip and squeeze the handles shut with a penny held between the handles. Hold for as long as possible until the penny falls to the floor. Time your hold and try to improve next session. Repeat with the other hand. That's it, simple but a great strengthener for the fingers, wrist, and forearms.