In contrast, the GPS values obtained from this study produced a relative TEM of 2.2%, suggesting that the values obtained in this study were similar to the known distances when considering the total values. Each participant was tracked by the video camera from the commencement of their course, until completion, with the audio function muted so the analyzer would not be able to hear the actions on the video playback. Furthermore, the ER can be used to track distance, duration, and frequency of activities of athletes involved in outdoor sports and indoor sports, which GPS currently is unable to perform. Additional reliability procedures were undertaken using match situations. In fact, notational analysis may be a preferred and more effective method for tracking than GPS, particularly for indoor sports such as futsal, and field and court sports where short distances and changes in direction are observed. Spon, pp. Although performance analysis research in rugby and data collection has progressed, the utility of the insights is not well understood. More recently, sports scientists have been using notational analysis systems to answer fundamental questions about game play and performance in sport. Movement analysis is important for understanding the physiological and technical demands associated with field and court team sports, and assisting coaches with the designing of training programs that may improve match performance (4,7,9,18,25). Sp = Team sports. In any case, the TEMs in this study indicate good to moderate reliability for notational analysis during the course duration and the futsal match, and an experienced analyzer would be able to carry out the analysis confidently, as hypothesized. In the literature there are large differences in sample sizes. 17. To define quantitatively where technique fails or excels has very practical uses for coaches, in particular, and also for sports scientists aiming to analyse performance at different levels of development of athletes. This information is particularly important to understand player loading and intensity requirements of athletic endeavors, and to detect the predominant energy system in use and the onset of fatigue (4). Notational Analysis lacks in reliability when the game is live as there maybe things that you miss and you cant go back and rewind to check. All results were collated and various statistical procedures were implemented using Statistical Package for Social Sciences (SPSS, version 16.0). This is why most sport statistics companies and elite sporting organisations employ several analysts to collect the same performance indicators on a live game, allowing to compare notated statistics between analysts with the purpose of improving the accuracy of the data collected.