For boxers, many measurements factor into the tale of the tape. Officials track body weight closely to ensure fighters are competing in the appropriate weight classes. Other factors like height and reach also are critical in determining the approach a boxer should take against his opponent. Reach refers to the total length of a boxer's arms, measured from right fingertip to left fingertip when the arms are parallel to the ground. While reach measurements are very common, arm length often will be used instead when compiling a fighter's statistics.
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Remove any upper body clothing. Proper measurements require that a fighter be shirtless to ensure consistent and accurate results.
Warm up by performing two to three minutes of light cardiovascular activity. This will prepare the body to be stretched. Then stretch the shoulders and arms by pulling each arm across the body at a height parallel to the floor. This will loosen the shoulder joint and ensure a proper measurement.
Extend one arm to the side, perpendicular to the body. Measure the distance between the armpit and the tip of the fighter's closed fist. Record this number in a notebook and repeat the measurement on the other arm.