Soccer can be distinguished as a high intensity, sporadic, intermittent course of exercise. The game of soccer is made up of a number of distinct phases of play over an average of 90 minutes. This excludes injury time and also extra time which may be needed in ‘knockout’ circumstances. The phases of play involve sprinting, change of direction, jogging, walking, kicking, heading and physical challenges for possession. (Capoo, et al 2012).
Bloomfield et al. carried out a study in 2007 to determine the amount of purposeful movements (PM) by players in each position. It therefore showed the physiological demands are highest in the case of midfielders followed by defenders and strikers. Goalkeepers were not included.
Pitch …show more content…
2007)
The above table shows midfielders come out on top in terms of percentage of time spent performing purposeful movements, the frequency of purposeful movements and the mean duration of their purposeful movements. Strikers spend more time than defenders performing purposeful movements and in terms of their mean duration but defenders have a slightly higher frequency of purposeful movements which is level with that of midfielders.
Aerobic performance
Soccer players cover anywhere form 8 – 13 kilometers in a match in an intermittent fashion. The sub maximal nature of the sport places considerable stress on the aerobic system. (V. Di Salvo et al 2009.). According to Walker et al. 2009. Aerobic energy makes up 90% of the overall energy production of a soccer player. A study done by J. Boone et al. 2012. shows that full backs and midfielders had the highest levels of Vo2 max followed by strikers, centre backs and goalkeepers. It also showed that the blood lactate levels after the testing showed little variation between all positions.
goalkeeper Centre back Full back Midfielder Striker
Vo2 Max Score 52.1 55.6 61.2 60.4 …show more content…
2010.)
The above table shows the agility test results of 150 elite male soccer players. It shows, somewhat surprisingly, that defenders were quickest in the ‘T – Test’. However, in the slalom test and the forward/backward sprints midfielders come out as the quickest. In the majority of the testing the attackers tended to have the slowest times.
Strength and Power
Soccer is a sport the in which well developed power and strength are necessary to compete at an elite level. (Chamari, et al. 2008). Power performance is greatly influenced by maximal strength. Power performance is improved by relative strength which is normally associated with improvements to maximal strength. (Hoff et al. 2004.) J. Boone et al. tested 289 professional soccer players across 5 playing positions in the squat jump and the counter movement jump exercises. Goalkeepers Centre Backs Full Backs Midfielders Attackers
CMJ 45.6cm 46.0cm 41.0cm 41.4cm 44.2cm
SJ 42.2 42.4 38.6 39.4 41.2
(J. Boone et al. 2012.)
The above table shows midfielders to have the second lowest jump height in both tests. Only full backs scored lower. These results may suggest that jump height is not a key attribute to a midfielders game and that it is more relevant to different