PROBLEM TO BE SOLVED: To enable an exercising user to grasp superiority of own physical ability simply and properly.SOLUTION: A diagnostic server includes an acquisition part for acquiring motion information of a diagnostic object user acquired by using an inertial sensor, a calculation part for calculating a physical strength age of the diagnostic object user on the basis of the acquired motion information of the diagnostic object user, and on a diagnostic reference related to the motion information classified by the age or by the age group, and an output part for outputting a diagnostic result related to the calculated physical strength age.SELECTED DRAWING: Figure 21
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