Apparatus for and method of measuring instantaneous power generated by a leg extending force

摘要

The invention relates to a method of and apparatus for measuring physical strength by dynamically measuring the instantaneous power of a nonrepetitive muscular force as, for example, the force exerted by a leg extension, on the basis of a power theory and, consequently, the instantaneous power generated by a dynamic, nonrepetitive multi-articular movement such as a vertical jump. Work equivalent to an inertial energy is absorbed by a rotary drive system. This work is then added with an amount of work equivalent to the kinetic energy absorbed by a foot plate, the sum being added to the work done to a powder brake to obtain the maximum speed V_max of the foot plate and its output time T_max. Finally, the power produced by a leg extension is calculated from the maximum speed V_max of the foot plate and its output time T_max.;An apparatus for such measurement includes a base frame (2); a box (3) disposed in a rear end of the base frame (2); a guide section (6) that extends in the same direction as the base frame (2) between the upper front surface of the box (3) and a vertical plate (2b) that stands at the front end of the base frame (2), with the upper front surface of the box serving as the base end; a foot section (7) that slides along the guide section (6) so that its sliding angle is variable; a measuring unit (8) that measures sliding conditions of the foot section (7); and a display unit (9) that displays, visually or aurally, various data on the leg extension of the subject.