Table 1 Search terms used for review; search 1 to 5 was combined with the operator ‘AND’, search 6 was combined with the operator ‘NOT’

Search 1

sport OR athlete OR player* OR military OR soldier OR “service men” OR “service member*”

Search 2

concuss* OR "sports related concussion" OR "sports-related concussion" OR mTBI OR "mild traumatic brain injury" OR "sport-induced concussion" OR "sport induced concussion" OR "mild head injury"

Search 3

assessment* OR test* OR evaluat* OR analysis OR examination OR outcome OR measure

Search 4

COP OR centre of pressure OR center of pressure OR gait OR movement OR single task OR single-task OR stiffness OR motor OR neuromuscular OR IMU OR "inertial measurement unit” OR accelerom* OR landing OR dynamic balance

Search 5

validity OR reliability OR sensitivity OR specificity OR “test–retest reliability”

Search 6

“motor accident” OR “car accident” OR “car crash” OR “wreck” OR “vehicle accident” OR “vehicle crash” OR “truck crash”