Matrix Big Bar Grips are a simple addition to your gym arsenal and are easily added to Olympic barbells, dumbbells and even cables. They can double the thickness of a standard Olympic barbell, instantly increasing muscle fibre stimulation, forearm size and overall grip strength. Using bar grips is relatively unknown among the mainstream fitness crowd but it is widely used by military and elites athletes across the world. The increase in popularity and rediscovery of thick bar training can in a large part be attributed to their use by top strength and conditioning coaches such as Charles Poliquin, Joe De Franco and Dave Tate. All of which claim their use will produce superior results in strength training. There are four key reasons why thicker grip training works so well.