@mrwatsonpe @WorldSnooker Fine as the movement is small and only a small muscle group is used.
Discrete as there is a clear start and end to the skill.
@mrwatsonpe Active process
Diaphram, external intercostal muscles sternocleidomastoid and pectoralis minor contract with high force
Ribs and sternum move up and out more and faster
Cavity volume increases more
Lung pressure decreases more
More air rushes in
@mrwatsonpe Impulse in SA node
Atrial systole
Impulse in AV node
Impulse down the bundle of his
Impulse along purkyne fibres
Ventricular systole
No impulse
Diastole