Abstract: An analyzer and practice aid primarily for determining a ball pitcher's or hitter's stride angle and stride length. The analyzer is comprised of a ground or floor mat with a grid imprinted on it, the grid havings a reference point from which reference lines extend forwardly and outwardly at predetermined angles toward a target, such as the home plate. The grid also includes lines that intersect the reference lines for easy measurement of the distance from the reference point toward the target. The mat may also include means behind the reference point for mounting an adjustable pitching rubber. The analyzer can also be used for batting practice and in training for improvement in other sports such as golf for determining a proper stance.