The effect of targeted exercise on knee-muscle function in patients with persistent hamstring deficiency following ACL reconstruction – study protocol for a randomized controlled trial

Table 2 Outcome measurements

	Data collection instrument	Collection time point
	Data collection instrument	Baseline	Post (12 weeks)Primary endpoint	Post (6 months)
Primary outcome
Maximal isometric knee flexor strength (of the ACL-reconstructed leg)	Maximal isometric dynamometry	x	x	x
Secondary outcomes
KOOS – 5 subscales	PROM	x	x	x
Maximal isometric knee-extensor strength	Maximal isometric dynamometry	x	x	x
Hamstring-to-quadriceps ratio	Maximal isometric dynamometry	x	x	x
Explorative outcomes
Counter movement jump	3-dimensional motion analysis	x	x
Gait analysis	3-dimensional motion analysis	x	x
One-legged jump for distance	Simple functional test	x	x
Postural sway	Simple functional test	x	x
Rate of force development	Maximal isometric dynamometry	x	x	x
Quadriceps and hamstring morphologies Volume Peak cross-sectional area Length	MRI	x	x
IKDC	PROM	x	x	x

Patient characteristics (age, BMI, time since operation, Tegner Activity Level Scale score) will be obtained at baseline
KOOS Knee injury and Osteoarthritis Outcome Score, IKDC International Knee Documentation Committee Subjective Knee Form, MRI magnetic resonance imaging, PROM Patient-reported Outcome Measure

ISSN: 1745-6215