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Results: the results of the accelerometer-based method show that the mean relative error of force calculation amounts to 3%. The measurement error of acceleration is less than 1%. The mean relative measurement error of the striking surface on the punching bag is 2%. However, the measurement error of force recorded with the strain gauge-based method is less than 1%. The results show that both systems are similar.

Conclusions: the punching bag having an embedded accelerometer is equipped with more versatile software, which makes the system a good tool for practical application in combat sport training.