Over the past 30 years the use of performance analysis in football has increased dramatically. Football is physiologically demanding: each position within the game requires different skills and physical attributes that a player needs to maintain to compete at a high standard. With the use of performance analysis systems it is becoming easier for coaches and sport scientists to gain important, detailed information to provide real-time technical analysis to improve their skills, and to evaluate the movement of players during training and matches. From amateur to professional, more teams are using GPS (Global Positioning System) and video analysis to improve there teams overall performance. The key indicators within football are: Technical (tackles …show more content…
A study by Di-Slavo et al., (2006) investigates the validation of ProZone, a recently developed video-analysis system. Its data provides very accurate, ‘almost perfect correlation’, as it is provided a variety of different runs and movements throughout (60m runs r = 0.999; 50m r = 0.999; 15m sprint r = 0.999; 20m zigzag sprint r = 0.959). Randers at al., (2010) supports this evidence as during their study, results show that the camera-system showed that athletes covered more accurate distance compared with other systems (time motion analysis: 12%, n = 17, P <0.001), more high intensity running (GPS: 37% n = 13; time motion analysis: 39% n = 13) and low intensity running (GPS: 20% n = 13; time-motion analysis 14% n = 15 and 16% n = 11). Although the study conducted by Randers et al., (2010) highlights that it is difficult when comparing data from video-analysis that it should be done with caution as there may be a problem misinterpretation results as there is no definition to explain the analysed term ‘dribbling with the ball’ or ‘pass provided’ (O’Donoghue, 2007). Roberts et al., (2008) study also shows a slight disadvantage about video analysis, proving that it can be very time consuming, with their study taking 8 hours to analyse the speeds/distances by just one rugby union player within a 80 minute game – is it a direct