Table 2. Summary of sample demographics and methods used to measure inter-limb strength asymmetry in the included articles (N = 53)

Article	Quality Score	Total Sample Size (N)	Sample Characteristics								Strength Asymmetry Test									Strength Asymmetry Metric
											Isolated						Functional
			Male	Female	Injured/Post-Surgery	Uninjured	Athlete	Non-Athlete	Young (≤55yrs)	Old (>55yrs)	Isokinetic Dynamometer	Stabilised Dynamometer	Hand-Held Dynamometer	Weight-Training Machine	Multi-Joint Strength Test	Nordic Hamstring	Jumping/Hopping	Push-Up	Seated Shot-Put	Torque	Force	Power	Impulse	Jump/Hop Height	Jump/Hop/Throw Distance	Vertical GRF	1-RM	Work Done	RFD
Abourezk et al., (2017)	22	36	✓	✓	✓	-	-	✓	✓	-	✓	-	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	-	-
Ageberg & Roos, (2016)	23	54	✓	✓	✓	-	-	✓	✓	-	-	-	-	✓	-	-	✓	-	-	-	-	✓	-	✓	✓	-	-	-	-
Almeida et al., (2019)	24	70	✓	✓	✓	-	-	✓	✓	-	✓	-	✓	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	-	-
Ardern et al., (2015)	21	42	✓	-	-	✓	✓	-	✓	-	✓	-	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	-	-
Batty et al., (2019)	22	100	✓	✓	✓	-	-	✓	✓	-	✓	-	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	-	-
Benjanuvatra et al., (2013)	20	58	✓	✓	-	✓	-	✓	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	✓	✓	-	✓	-	-	-
Bishop et al., (2019c)	20	28	?	?	-	✓	✓	-	✓	-	-	-	-	-	✓	-	✓	-	-	-	✓	-	✓	✓	-	-	-	-	-
Bishop et al., (2019d)	21	16	-	✓	-	✓	✓	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	✓	-	-	-	-	-
Bookbinder et al., (2020)	23	52	✓	✓	✓	✓	-	✓	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	✓	✓	-	-	-	-
Bourne et al., (2015)	22	178	✓	-	✓	✓	✓	-	✓	-	-	-	-	-	-	✓	-	-	-	-	✓	-	-	-	-	-	-	-	-
Carabello et al., (2010)	23	93	✓	✓	-	✓	-	✓	✓	✓	-	-	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-	✓	-	-
Chmielewski et al., (2014)	20	125	✓	✓	-	✓	✓	-	✓	-	-	-	-	-	-	-	-	-	✓	-	-	-	-	-	✓	-	-	-	-
Clark & Mullally, (2019)	23	23	-	✓	-	✓	✓	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	✓	✓	-	-	-	-
Coratella et al., (2018)	24	27	✓	-	-	✓	✓	-	✓	-	✓	-	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	-	-
Costa Silva et al., (2015)	20	22	?	?	-	✓	✓	-	✓	-	✓	-	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	-	-
Dai et al., (2018)	23	499	✓	✓	-	✓	✓	-	✓	-	-	-	-	-	-	-	✓	✓	-	-	✓	-	-	✓	-	-	-	-	-
de Lira et al., (2017)	21	112	✓	-	-	✓	✓	-	✓	-	✓	-	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	-	-
Dos’Santos et al., (2017a)	23	22	✓	-	-	✓	✓	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-
Dos'Santos et al., (2018)	22	20	✓	-	-	✓	✓	-	✓	-	-	-	-	-	✓	-	-	-	-	-	✓	-	✓	-	-	-	-	-	-
Falstrom et al., (2017)	24	154	-	✓	✓	✓	✓	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-
Fort-Vanmeerhaeghe et al., (2015)	21	29	-	✓	-	✓	✓	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	✓	✓	-	-	-	-
Fort-Vanmeerhaeghe et al., (2016)	20	79	✓	✓	-	✓	✓	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	✓	-	-	-	-	-
Guney-Deniz et al., (2019)	24	87	✓	✓	✓	✓	-	✓	✓	-	✓	-	-	-	-	-	✓	-	-	✓	-	-	-	-	✓	-	-	-	-
Hadzic et al., (2010)	20	183	✓	✓	✓	✓	✓	-	✓	-	✓	-	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	-	-
Harput et al., (2018)	22	72	✓	-	✓	-	-	✓	✓	-	✓	-	-	-	-	-	✓	-	-	✓	-	-	-	-	✓	-	-	-	-
Hart et al., (2014)	20	31	✓	-	-	✓	✓	-	✓	-	-	-	-	-	✓	-	-	-	-	-	✓	-	-	-	-	-	-	-	-
Hiemstra et al., (2008)	23	48	✓	✓	✓	-	-	✓	✓	-	✓	-	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	-	-
Holsgaard-Larsen et al., (2015)	24	48	✓	-	✓	✓	-	✓	✓	-	-	✓	-	-	-	-	✓	-	-	✓	-	-	-	✓	✓	-	-	-	-
Hubbard et al., (2007)	23	60	✓	✓	✓	✓	-	✓	✓	-	✓	-	✓	-	-	-	-	-	-	✓	✓	✓	-	-	-	-	-	-	-
Hughes et al., (2019)	21	125	✓	✓	✓	-	-	✓	✓	-	✓	-	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	-	-
Kaminska et al., (2015)	22	34	✓	-	✓	✓	-	✓	✓	-	✓	-	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	✓	-
Lisee et al., (2019)	23	117	✓	✓	-	✓	✓	✓	✓	-	✓	-	-	-	-	-	✓	-	-	✓	-	✓	-	-	✓	-	-	-	-
Lloyd et al., (2020)	21	43	✓	-	-	✓	✓	-	✓	-	-	-	-	-	-	-	✓	-	-	-	✓	-	-	-	✓	-	-	-	-
Lockie et al., (2012)	20	16	✓	-	-	✓	✓	-	✓	-	✓	-	-	-	-	-	-	-	-	✓	✓	-	-	-	-	-	-	-	-
Lockie et al., (2014	21	30	✓	-	-	✓	✓	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	✓	✓	-	-	-	-
Lockie et al., (2013)	20	16	✓	-	-	✓	✓	-	✓	-	✓	-	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	-	-
Lockie et al., (2016)	21	19	✓	-	-	✓	✓	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-
Madruga-Parera et al., (2019)	22	41	?	?	-	✓	✓	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	✓	-	-	-	-	-
Madruga-Perera et al., (2020)	20	42	✓	-	-	✓	✓	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	✓	✓	-	-	-	-
Maloney et al., (2016)	21	18	✓	-	-	✓	-	✓	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	✓	-	-	-	-	-
Menzel et al., (2013)	20	46	✓	-	-	✓	✓	-	✓	-	✓	-	-	-	-	-	✓	-	-	✓	-	✓	✓	-	-	✓	-	✓	-
Miles et al., (2019)	22	66	✓	-	✓	✓	✓	-	✓	-	✓	-	-	-	-	-	✓	-	-	✓	-	-	✓	-	-	-	-	-	-
Opar et al., (2015)	22	210	✓	-	✓	✓	✓	-	✓	-	-	-	-	-	-	✓	-	-	-	-	✓	-	-	-	-	-	-	-	-
Peebles et al., (2019)	23	30	✓	✓	✓	-	-	✓	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-
Redden et al., (2018)	24	13	✓	-	-	✓	✓	-	✓	-	-	-	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-

Table 2. Continue...

Article	Quality Score	Total Sample Size (N)	Sample Characteristics								Strength Asymmetry Test									Strength Asymmetry Metric
											Isolated						Functional
			Male	Female	Injured/Post-Surgery	Uninjured	Athlete	Non-Athlete	Young (≤55yrs)	Old (>55yrs)	Isokinetic Dynamometer	Stabilised Dynamometer	Hand-Held Dynamometer	Weight-Training Machine	Multi-Joint Strength Test	Nordic Hamstring	Jumping/Hopping	Push-Up	Seated Shot-Put	Torque	Force	Power	Impulse	Jump/Hop Height	Jump/Hop/Throw Distance	Vertical GRF	1-RM	Work Done	RFD
Reid et al., (2007)	23	42	✓	✓	✓	-	-	✓	✓	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	✓	-	-	-	-
Riemann & Davies, (2019)	20	24	✓	✓	-	-	-	✓	✓	-	✓	-	-	-	-	-	-	-	✓	-	✓	-	-	-	✓	-	-	-	-
Suchomel et al., (2016)	22	13	✓	-	-	✓	-	✓	✓	-	-	-	-	-	-	-	✓	-	-	-	✓	✓	✓	-	-	-	-	-	✓
Vanderstukken et al., (2019)	21	50	✓	-	-	✓	✓	✓	✓	-	✓	-	-	-	-	-	-	-	-	✓	✓	-	-	-	-	-	-	-	-
Welling et al., (2019)	23	68	✓	-	✓	✓	✓	-	✓	-	✓	-	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	-	-
Xergia et al., (2013)	24	44	✓	-	✓	✓	-	✓	✓	-	✓	-	-	-	-	-	✓	-	-	✓	-	-	-	-	-	✓	-	-	-
Zwolski et al., (2015)	22	139	✓	✓	✓	-	✓	-	✓	-	✓	-	-	-	-	-	-	-	-	✓	-	-	-	-	-	-	-	-	-
Zwolski et al., (2016)	22	45	-	✓	✓	✓	✓	-	✓	-	✓	-	-	-	-	-	✓	-	-	✓	-	-	-	-	-	✓	-	-	-
Total			4	2	2	4	3	2	5	1	2	1	2	3	3	2	2	1	2	2	1	7	6	1	1	4	1	2	1

GRF = Ground Reaction Force, 1-RM = 1-Repetition Maximum, RFD = Rate of Force Development