PROBLEM TO BE SOLVED: To in principle not be able to give an appropriate load that should be given at each movement of bending and stretching of a joint by the conventional method in which the muscle strength against the load is not measured. In addition, although it has been attempted to perform load sensing and load adjustment according to the load sensing, the muscle could not bring out the “maximum output that can be output at that moment”. SOLUTION: In a training load generating device for muscle strengthening including sports training, a trainee operates a load, which is mounted on a support for supporting the entire device, and an operating part. A slide guide for moving the operation part, a load generating device for generating a load on the operation part, a ball screw mechanism for transmitting the load to the operation part, and a muscle generated by the generated load. At least a sensor for detecting the output is provided, the output of the muscle is measured by the sensor in real time, and the load amount is adjusted according to the output data. [Selection diagram] Figure 1
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