20.500.12556/RUL-135532 Use of IMU in differential analysis of the reverse punch temporal structure in relation to the achieved maximal hand velocity To achieve good performance, athletes need to synchronize a series of movements in an optimal manner. One of the indicators used to monitor this is the order of occurrence of relevant events in the movement timeline. However, monitoring of this characteristic of rapid movement is practically limited to the laboratory settings, in which motion tracking systems can be used to acquire relevant data. Our motivation is to implement a simple-to-use and robust IMU-based solution suitable for everyday praxis. In this way, repetitive execution of technique can be constantly monitored. This provides augmented feedback to coaches and athletes and is relevant in the context of prevention of stabilization of errors, as well as monitoring for the effects of fatigue. In this research, acceleration and rotational speed signal acquired from a pair of IMUs (Inertial Measurement Unit) is used for detection of the time of occurrence of events. The research included 165 individual strikes performed by 14 elite and national-level karate competitors. All strikes were classified as slow, average, or fast based on the achieved maximal velocity of the hand. A Kruskal–Wallis test revealed significant general differences in the order of occurrence of hand acceleration start, maximal hand velocity, maximal body velocity, maximal hand acceleration, maximal body acceleration, and vertical movement onset between the groups. Partial differences were determined using a Mann–Whitney test. This paper determines the differences in the temporal structure of the reverse punch in relation to the achieved maximal velocity of the hand as a performance indicator. Detecting the time of occurrence of events using IMUs is a new method for measuring motion synchronization that provides a new insight into the coordination of articulated human movements. Such application of IMU can provide additional information about the studied structure of rapid discrete movements in various sporting activities that are otherwise imperceptible to human senses. IMU karate punch velocity gyaku zuki event timeline accelerometer gyroscope sensor fusion IMU karate hitrost udarca gyaku zuki časovnica dogodkov pospeškometri žiroskopi zlivanje senzorjev true false true Angleški jezik Slovenski jezik Članek v reviji 2022-03-17 13:35:25 2022-03-17 13:35:25 2022-09-14 04:13:51 0000-00-00 00:00:00 2021 0 0 13 str. iss. 12, art. 4148 Vol. 21 Jun. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 531.768:796.853.26 1424-8220 10.3390/s21124148 67401987 RAZ_Markovic_Stefan_2021.pdf RAZ_Markovic_Stefan_2021.pdf 1 CB7CCB484487586079DC9164447378AE c02a1749c93c54dd8f76bcfe9c508d80cefab827ff23fb9e7da6b1da896e5ac5 042ae646-a5ef-11ec-8556-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154656 https://www.mdpi.com/1424-8220/21/12/4148 1 b685659b-a5ee-11ec-8556-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154655 Fakulteta za elektrotehniko 0 0 0