In recent years, many studies have compared physical demands in professional soccer by analyzing the distances covered by the players at different speeds 1, 2. The quantification of the demands of competition enables us to improve the individual and team specificity of training load. However, caution is required when interpreting the results and a comparison with a gold standard is required in order to validate both systems. Thus, both systems demonstrated an acceptable degree of agreement and could be useful in analyzing players’ acceleration demands in professional soccer. All scores in the smallest worthwhile change were lower than 9% and in the coefficients of variation were lower than 95% and 15%, respectively. The magnitude of change in means (%) between systems, defined as the percentage change between the numbers or values, was below 14% and 7% for number and distances covered, respectively. Also, the Intra class Correlation Coefficients (ICCs) for agreement and consistency between systems showed good and excellent values (> 0.90). The standardized typical errors in the estimate (TEE) were moderate (0.3–0.59) and small to moderate (0.1–0.29 to 0.3–0.59), respectively. Second, negative relationships were found (i.e., negative bias) comparing WIMU PRO to MEDIACOACH in the number of accelerations and decelerations between 0/1 m/s 2 and ½ m/s 2 ( p 0.19) and small (0.2–0.59) for most variables. First, the descriptive statistics presented more bursts of accelerations and decelerations in WIMU PRO than in MEDIACOACH, whereas the distances covered recorded by both systems were similar.
Data from a Spanish professional club were registered over the course of a season. iSportsAnalysis is an excellent aid for all passionate coaches and I would definitely recommend it to be used at all tournaments.The aim of this study was to analyze the degree of agreement comparing number and distance covered in different acceleration and deceleration sections registered by a video tracking system (MEDIACOACH) and a GPS device (WIMU PRO) during official competition. Players, through this medium, were able to see which areas of play they need to work on and also to receive individual exercises during the week. This programme afforded me the opportunity of communicating with the players through "Coaches Corner" giving feedback regarding tactical work for the upcoming matches.
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The software was of invaluable assistance especially because of the logistics of my team members living far apart, and their work commitments preventing us from practising during the week. For someone with limited techno savvy, and with Cristy’s assistance, I was quickly able to master iSportsAnalysis which I used daily.
NSA (Netball South Africa) has indeed come up with a winning recipe by making iSportsAnalysis accessible to coaches, players and umpires. I would just like to extend a huge thank you to iSportAnalysis for the unbelievable assistance their Sports Performance Analysis software offered during the TNL league.
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