A warm-up will improve the effectiveness of training and should be done before every training session. This is fundamental to a safe practice.
Direct physical effects:
Release of adrenaline
Increased heart rate
Enables oxygen in the blood to travel with greater speed
Increased production of synovial fluid located between the joints to reduce friction
Allows joints to move more efficiently
Dilation of capillaries
Enables oxygen in the blood to travel at a higher volume
Increase of temperature in the muscles
Decreased viscosity of blood
Enables oxygen in the blood to travel with greater speed
Facilitates enzyme activity
Encourages the dissociation of oxygen from haemoglobin
Decreased viscosity within the muscle
Greater extensibility and elasticity of muscle fibres
Increased force and speed of contraction
Increase of muscle metabolism
Supply of energy through breakdown of glycogen
Increase in speed of nerve impulse conduction.
A comprehensive warm-up programme has been found to decrease injuries in soccer
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