Macro Criteria
The best require the least effort to generate the required ball speed, therefore with a maximum effort they can hit the ball fastest. The worst require the most effort. The rankings under the five benchmark criteria were weighted according to the ratio of the magnitude of the work required for the best (lowest) in that benchmark condition to the work required for the best in the Second Benchmark Condition, which was highest of all, and therefore by weighting had more effect on the composite weighted rank.
Wrist Safety
The best (lowest rank number) are the safest for the wrist; the worst are dangerous. The macro criterion of Wrist Safety comprises the evaluation criteria of 1.5*Wrist Crunch, Moment, Torque, and 0.5*Flex. Each of these evaluation criteria (Torque, etc.) produced composite rankings when the results under the five benchmark conditions were compiled, weighted, summed, and sorted. These composite rankings then were compiled, weighted, summed, and sorted to produce rankings under the macro criterion of Wrist Safety.
Elbow Safety
The best (lowest rank number) are the safest for the elbow; the worst are dangerous. The macro criterion of Elbow Safety comprises the evaluation criteria of 1.5*Elbow Crunch, Torque, Shock, 0.5*Moment, and 0.5*Flex. Moment and Flex were weighted half as much as Torque and Shock, which are more important, and Elbow Crunch was weighted 1.5 times Torque and Shock, because it is even more important. Each of these evaluation criteria (Torque, etc.) produced composite rankings when the results under the five benchmark conditions were compiled, weighted, summed, and sorted. These composite rankings then were compiled, weighted, summed, and sorted to produce rankings under the macro criterion of Elbow Safety.
Shoulder Safety
The best (lowest rank number) are the safest for the shoulder; the worst are dangerous. The macro criterion of Shoulder Safety comprises the evaluation criteria of Shoulder Pull, 0.72*Shoulder Crunch, Impulse Reaction (same ranks as Impact Force), Torque, and 0.5*Flex. Each of these evaluation criteria (Torque, etc.) produced composite rankings when the results under the five benchmark conditions were compiled, weighted, summed, and sorted. These composite rankings then were compiled, weighted, summed, and sorted to produce rankings under the macro criterion of Shoulder Safety.
The best (lowest rank number) are the easiest to wield; the worst are more tiring to weak players. The macro criterion of Dexterity comprises Moment, Swingweight, and 0.5*Weight. The rankings under these were compiled, weighted, summed, and sorted to produce rankings under the macro criterion of Dexterity. This is a measure of how light and agile the feeling of the racquet is, before contact with the ball. Because "pick up appeal" is the top criterion for racquet customers, and many players do not have the physical conditioning to manage the heavier racquets, this macro criterion is included. Expert players, please note that many of the best racquets get low rankings on Dexterity because of their high weight and swingweight (SWT), so for you this criterion should be disregarded.