Table 1.

Keyword grouping used during the systematic search.

Muscles	Injury	Timing	Running	Biomechanics
Hamstring *	Injur *	Past	Run *	Mechanic *
Semitendinosus	Strain	Prior	Sprint *	Biomechanic *
Semimembranosus	Tear	Retrospectiv *	Acceleration	Kinematic *
‘Biceps Femoris’	Pull	Previous *		Kinetic *
‘Posterior Thigh’	Rupture	Recent *		Techni *
Thigh	Torn	Histor *
		Prospectiv *

* Truncation. Boolean term OR was used within groups, while AND was used between groups.