TY  - JOUR
AU  - Vuković, Vesna
AU  - Dopsaj, Milivoj
AU  - Koropanovski, Nenad
AU  - Marković, Stefan
AU  - Kos, Anton
AU  - Umek, Anton
PY  - 2021
UR  - http://jakov.kpu.edu.rs/handle/123456789/1389
AB  - In order to understand the complexity of punches, measurement under realistic conditions in a training environment is necessary. A crucial element to achieving valid results is a reliable instrument. The aim of the study was to evaluate the metrical characteristics and reliability of kinematic sensors (KS) in specific karate testing as a novel method in the training process. Fourteen male competitors, members of a Serbian national senior and cadet karate team, participated in the study. Segmental acceleration in the different modalities of reverse punch (Gyako tsuki) were measured using KS placed on the hand and body. In relation to the qualitative criterion of the intraclass correlation coefficient (ICC) significance, good reliability (ICC = 0.75–0.90) was observed for eight kinematic variables, while excellent reliability (ICC > 0.90) was confirmed for ten kinematic variables. KS can be considered sophisticated measuring tools providing a reliable base of information for the objectification of assessment as the primary approach to top-level athletes.
PB  - Elsevier Ltd.
T2  - Measurement : Journal of the International Measurement Confederation (IMEKO)
T1  - Metrical characteristics and the reliability of kinematic sensor devices applied in different modalities of reverse punch in karate athletes
IS  - 177
SP  - 109315
DO  - 10.1016/j.measurement.2021.109315
ER  - 

@article{
author = "Vuković, Vesna and Dopsaj, Milivoj and Koropanovski, Nenad and Marković, Stefan and Kos, Anton and Umek, Anton",
year = "2021",
abstract = "In order to understand the complexity of punches, measurement under realistic conditions in a training environment is necessary. A crucial element to achieving valid results is a reliable instrument. The aim of the study was to evaluate the metrical characteristics and reliability of kinematic sensors (KS) in specific karate testing as a novel method in the training process. Fourteen male competitors, members of a Serbian national senior and cadet karate team, participated in the study. Segmental acceleration in the different modalities of reverse punch (Gyako tsuki) were measured using KS placed on the hand and body. In relation to the qualitative criterion of the intraclass correlation coefficient (ICC) significance, good reliability (ICC = 0.75–0.90) was observed for eight kinematic variables, while excellent reliability (ICC > 0.90) was confirmed for ten kinematic variables. KS can be considered sophisticated measuring tools providing a reliable base of information for the objectification of assessment as the primary approach to top-level athletes.",
publisher = "Elsevier Ltd.",
journal = "Measurement : Journal of the International Measurement Confederation (IMEKO)",
title = "Metrical characteristics and the reliability of kinematic sensor devices applied in different modalities of reverse punch in karate athletes",
number = "177",
pages = "109315",
doi = "10.1016/j.measurement.2021.109315"
}

Vuković, V., Dopsaj, M., Koropanovski, N., Marković, S., Kos, A.,& Umek, A.. (2021). Metrical characteristics and the reliability of kinematic sensor devices applied in different modalities of reverse punch in karate athletes. in Measurement : Journal of the International Measurement Confederation (IMEKO)
Elsevier Ltd..(177), 109315.
https://doi.org/10.1016/j.measurement.2021.109315

Vuković V, Dopsaj M, Koropanovski N, Marković S, Kos A, Umek A. Metrical characteristics and the reliability of kinematic sensor devices applied in different modalities of reverse punch in karate athletes. in Measurement : Journal of the International Measurement Confederation (IMEKO). 2021;(177):109315.
doi:10.1016/j.measurement.2021.109315 .

Vuković, Vesna, Dopsaj, Milivoj, Koropanovski, Nenad, Marković, Stefan, Kos, Anton, Umek, Anton, "Metrical characteristics and the reliability of kinematic sensor devices applied in different modalities of reverse punch in karate athletes" in Measurement : Journal of the International Measurement Confederation (IMEKO), no. 177 (2021):109315,
https://doi.org/10.1016/j.measurement.2021.109315 . .

TY  - JOUR
AU  - Marković, Stefan
AU  - Kos, Anton
AU  - Vuković, Vesna
AU  - Dopsaj, Milivoj
AU  - Koropanovski, Nenad
AU  - Umek, Anton
PY  - 2021
UR  - http://jakov.kpu.edu.rs/handle/123456789/1390
AB  - 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.
PB  - Basel : MDPI
T2  - Sensors
T1  - Use of IMU in Differential Analysis of the Reverse Punch Temporal Structure in Relation to the Achieved Maximal Hand Velocity
VL  - 21
IS  - 12
SP  - 4148
DO  - 10.3390/s21124148
ER  - 

@article{
author = "Marković, Stefan and Kos, Anton and Vuković, Vesna and Dopsaj, Milivoj and Koropanovski, Nenad and Umek, Anton",
year = "2021",
abstract = "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.",
publisher = "Basel : MDPI",
journal = "Sensors",
title = "Use of IMU in Differential Analysis of the Reverse Punch Temporal Structure in Relation to the Achieved Maximal Hand Velocity",
volume = "21",
number = "12",
pages = "4148",
doi = "10.3390/s21124148"
}

Marković, S., Kos, A., Vuković, V., Dopsaj, M., Koropanovski, N.,& Umek, A.. (2021). Use of IMU in Differential Analysis of the Reverse Punch Temporal Structure in Relation to the Achieved Maximal Hand Velocity. in Sensors
Basel : MDPI., 21(12), 4148.
https://doi.org/10.3390/s21124148

Marković S, Kos A, Vuković V, Dopsaj M, Koropanovski N, Umek A. Use of IMU in Differential Analysis of the Reverse Punch Temporal Structure in Relation to the Achieved Maximal Hand Velocity. in Sensors. 2021;21(12):4148.
doi:10.3390/s21124148 .

Marković, Stefan, Kos, Anton, Vuković, Vesna, Dopsaj, Milivoj, Koropanovski, Nenad, Umek, Anton, "Use of IMU in Differential Analysis of the Reverse Punch Temporal Structure in Relation to the Achieved Maximal Hand Velocity" in Sensors, 21, no. 12 (2021):4148,
https://doi.org/10.3390/s21124148 . .