The Adidas MiCoach X_Cell is revolutionizing how athletes improve their game. The X_Cell is able to provide users with sport-specific metrics like jump height, acceleration, reaction speed, heart rate, and more. Paired with their professionally designed training plans, X_Cell will help athletes target improvement areas and allow them to train efficiently to take their game to the next level. The Adidas X_Cell clips to an adjustable chest strap which comes with the device, or it can also be worn with X_CELL base layer shirts and other heart rate sensing apparel.