1.1 Macro-traumatic (traumatic) Instability
- As mentioned in MODULE 1, macro-traumatic instability is the result of an acute trauma to
the shoulder, such as a fall or collision in contact sport or it can be due to a sudden
increase in overload leading to a “moment in time” when a structural lesion develops
(such as the last repetition of a bench press after an overloaded session in the gym or
the last few serves after doubling training duration in a tennis session). - There are variations as to how any an individual’s GHJ will be impacted by any one traumatic
event, dependent in part due to the variability of an individual’s anatomy and presence
of any underlying GHJ hypermobility. In some circumstances the exact position of the
arm at the time of injury is known, in others it is unclear. - Once a traumatic event has occurred, then this will affect the individual’s movement
strategies, particularly if there is structural damage to the joint.