If you've ever tried to finish a set of weighted pull-ups and felt your hands give out before your back did, you are already familiar with the importance of grip strength, even if you didn't realize it at the time. Grip strength isn't just about a firm handshake or showing off forearm veins. It's one of the most accurate measurements of overall fitness and health. In fact, it may tell you more about your physical condition - and even your longevity - than the number on your s