Pd - Factors Affecting Performance in Soccer

pd Assignment- Factors Affecting Performance

3 Positions  
Centre Midfield
Goal Keeper

Centre Midfield

in soccer, there are usually 3 or 4 Midfielders. The Midfielders play between the Fullbacks and the Forwards. They are often in the "Middle Third" of the field. There can be "Offensive Midfielders" who play closer to the Forwards and "Defensive Midfielders" who play closer to the Fullbacks. The centre Midfielders are between the offensive and defensive midfielders.

40 % of energy requirements for a centre midfielder comes from the Aerobic system. This is due to the fact that this position incorporates periods of jogging for just over 2 minutes. Aerobic activity is defined as any activity lasting over 2 minutes where oxygen mist be present in order to generate adenosine tri-phosphate (ATP). The system which uses energy which can supply a player jogging for over 800 m at one time is the lactic acid system. The lactic acid system uses glucose as its source of fuel and the duration of this energy system is just up to 3 minutes.   When the player exceeds 800m and further runs approximately 1500m the aerobic system becomes dominant as this long distance requires the presence of oxygen to ensure the continuation of muscular contraction.

However, 60% of energy requirements for a centre midfielder comes from the anaerobic system. Anaerobic activity is defined as an activity that requires shorter bursts of energy usually lasting anywhere from less than 10 seconds up to two minutes.   The anaerobic system is dominant as sprinting occurs in numerous short 10 – 40 meter bursts. 90% of the Anaerobic system is used in sprints under 100 meters. Explosive anaerobic movements such as sprinting requires speed, agility and quickness. This explosive movement along with kicking, tackling, quick passes and changing pace consequently causes   the ATP-PC energy system to come into action. Further muscular work relies on creatine phosphate breaking down to...