Table 1.

Groupings and categories for classifying type of injury [15].

Terminology	Description
Muscle
Tear	Injuries with structural damage or complete muscle rupture, corresponding to grades IIIa, b and IV according to Müller-Wohlfahrt et al.
Strain	Injuries with functional damage, corresponding to grade II according to Müller-Wohlfahrt et al.
Functional Muscle disorder	Injuries involving functional disorders without structural damage to the musculature (e.g., neuromuscular disorders or fatigue-related muscular disorders)
Bone
Physeal injury	Physeal injuries other than physeal fractures (e.g., apophysitis)
Mature Bone
Fracture	All fractures of mature bones caused by trauma
Other Bone injury	Structural bone damage such as bone marrow oedema, stress fractures or periostitis
Ligament
Sprain/Ligament injury	Strained or torn ligaments responsible for joint stability
Others
Concussion	Mild traumatic brain injury resulting from head impact or acceleration-deceleration forces
Skin lesion	Mechanical or thermal damage causing a disruption of the skin barrier.
Other injury	Acute functional impairment without diagnosis of specific tissue pathology
Non-specific overuse	Slow-onset functional impairment reported without diagnosis of specific tissue pathology