Significant Predictors of Sports Performance in Elite Men Judo Athletes Based on Multidimensional Regression Models

Kostrzewa, Maciej; Laskowski, Radosław; Wilk, Michał; Błach, Wiesław; Ignatjeva, Angelina; Nitychoruk, Magdalena

doi:10.3390/ijerph17218192

Cited by 12 publications

(13 citation statements)

References 35 publications

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“…Lower-limb muscle groups are particularly important in judo. Hence, we suggest paying particular attention to developing the strength of the muscles of the lower extremities in the training process, which is related to the health aspect of judo practitioners [ 29 ]. Certainly, more studies are needed in the field of isokinetic analysis in professional sports.…”

Section: Discussionmentioning

confidence: 99%

Isokinetic Profile of Elite Serbian Female Judoists

Błach

Drapšin

Lakičević

et al. 2021

IJERPH

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Elite judo athletes undergo vigorous training to achieve outstanding results. In pursuit of achieving competitive success, the occurrence of injuries amongst judo athletes is not rare. The study aimed to perform a knee flexors and extensors isokinetic torque analysis in elite female judo athletes. Fifty-eight elite female judo athletes of the Serbian national team (21.02 ± 3.11 years; 62.36 ± 11.91 kg, 165.04 ± 10.24 cm, training experience 12.72 ± 2.98 years) volunteered to participate in this study. The range of motion (ROM) was set at 90⁰. Testing was performed in a concentric–concentric mode for the testing speed of 60 ⁰/s. Five maximal voluntary contractions of knee extensors and knee flexors muscle groups were measured for both legs. The obtained data showed a statistically significant difference in absolute torque values among different categories as heavier athletes demonstrated higher values. Post hoc analysis showed a significant difference between weight categories, as heavier athletes demonstrated higher values, while no significant differences in normalized torque values for different weight categories were observed. The implementation of new elements and training modalities may improve performance and prevent lateral asymmetry, thus reducing the risk of injury.

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Section: Discussionmentioning

confidence: 99%

Isokinetic Profile of Elite Serbian Female Judoists

Błach

Drapšin

Lakičević

et al. 2021

IJERPH

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“…Smaruj et al [ 36 ] and Kostrzewa et al [ 37 ] mention strength, correct posture, effective movements and balance as critical elements in judo. Due to the activity’s complexity, judo training can also be considered as a tool for increasing the strength of postural muscles, which should be taken into account when planning training for children.…”

Section: General Recommendationsmentioning

confidence: 99%

Principles of Judo Training as an Organised Form of Physical Activity for Children

Kowalczyk

Zgorzalewicz-Stachowiak

Błach

et al. 2022

IJERPH

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When organising judo training for children, it is essential to ensure maximum safety, and use an appropriate training methodology adapted to the age of the youngest judo athletes. This paper aims to review the current literature containing judo training principles and safety-related considerations for preschool (4–6 years) and school-age (7–12 years) children as an organised physical activity. Data were collected until October 2021 from eight international scientific databases (PubMed, Scopus, UpToDate, Web of Science, Cochrane, EBSCOhost, ScienceDirect, Google Scholar). In the overviews, we found various times and frequencies of judo training for children. In preschool, the training time was 30–60 min with a frequency of 2–3 times per week, whereas in the school-age group, the training time was extended from 45 to 90 min 3–4 times per week. The most common injuries included upper arm injuries, followed by those of the lower limbs. In the future, it would be an advantage to systematise the methodology of judo training as an organised form of physical activity that can complement the daily dose of exercises recommended by the World Health Organization for maintaining children’s general health.

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“…Using a ridge regularisation was motivated by the high dimensional context that may lead to unsteady multivariate linear models, excessively sensitive to an expanded space of solutions. Accordingly, ridge regularisation reduces the space of solutions while solving collinearity problems, which remains common in sports [30][31][32] . It thus prevents biased estimates through penalising estimates of correlated features 33,34 .…”

Section: Data Setmentioning

confidence: 99%

Using Global Navigation Satellite Systems for modeling Athletic Performances in elite football players

Imbach

Ragheb

Leveau

et al. 2022

Preprint

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This study aims to predict individual Acceleration-Velocity profiles (A-V) from Global Navigation Satellite System (GNSS) measurements in real-world situations. Data were collected from professional players in the Superleague division during a 1.5 season period (2019-2021). A baseline modeling performance was provided by time-series forecasting methods and compared with two multivariate modeling approaches using ridge regularisation and long short term memory neural networks. The multivariate models considered commercial features and new features extracted from GNSS raw data as predictor variables. A control condition in which profiles were predicted from predictors of the same session outlined the predictability of A-V profiles. Multivariate models were fitted either per player or over the group of players. Predictor variables were pooled according to the mean or an exponential weighting function. As expected, the control condition provided lower error rates than other models on average (p = 0.001). Reference and multivariate models did not show significant differences in error rates (p = 0.124), regardless of the nature of predictors (commercial features or extracted from signal processing methods) or the pooling method used. In addition, models built over a larger population did not provide significantly more accurate predictions. In conclusion, GNSS features seemed to be of limited relevance for predicting individual A-V profiles. However, new signal processing features open up new perspectives in athletic performance or injury occurrence modeling, mainly if higher sampling rate tracking systems are considered.

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Significant Predictors of Sports Performance in Elite Men Judo Athletes Based on Multidimensional Regression Models

Cited by 12 publications

References 35 publications

Isokinetic Profile of Elite Serbian Female Judoists

Isokinetic Profile of Elite Serbian Female Judoists

Principles of Judo Training as an Organised Form of Physical Activity for Children

Using Global Navigation Satellite Systems for modeling Athletic Performances in elite football players

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