Table 1.

Intrarater and interrater reliability of ultrasound muscle thickness measurements at each measured site

Measured site	Number of subjects	Posture and state of MT testing		Device	Reliability & Precision			Reference
					ICC	95%CI	SEM
Intrarater reliability
Anterior thigh	N = 10	Standing	Resting	Aloka	0.97	–	–	Miyatani et al. 200413
VL	N = 21	Sitting	Resting	GE	0.96	0.90–.98	–	Raj et al. 201214
Anterior thigh	N = 18	Standing	Resting	Nanshan	0.89	0.79–.94	–	Thoirs & English 200915
		Supine	Resting		0.90	0.80–.95	–
Posterior thigh	N = 18	Standing	Resting		0.70	0.49–.84	–
		Prone	Resting		0.71	0.79–.84	–
Anterior thigh	N = 42	Supine	Resting	NR	0.98	–	–	Tillquist et al. 201416
Anterior thigh	N = 15	Standing	Resting	Aloka	0.98	–	0.07	Abe et al. 201417
Posterior thigh					0.95	–	0.10
Posterior lower leg	YM = 15	Prone	Resting	GE	0.98	–	–	Weiss & Clark 198518
Posterior lower leg	YW = 15	Prone	Resting		0.99	–	–
Posterior lower leg	N = 10	Standing	Resting	Aloka	0.96	–	–	Miyatani et al. 200413
Anterior lower leg	N = 18	Standing	Resting	Nanshan	0.83	0.69–.91	–	Thoirs & English 200915
		Supine	Resting		0.88	0.77–.94	–
Posterior lower leg	N = 18	Standing	Resting		0.83	0.69–.91	–
		Prone	Resting		0.34	0.07–.64	–
MG	YC = 21	Prone	Resting	Phillips	0.94	0.86–.98	–	Legerlotz et al. 201019
				Chison	0.98	0.94–.99	–
MG	N = 21	Prone	Resting	GE	0.97	0.92–.99	–	Raj et al. 201214
TA	N = 10	Supine	Resting	GE	0.90	–	–	Crofts et al. 201420
Interrater reliability
Anterior thigh	N = 78	Supine	Resting	NR	0.95	–	–	Tillquist et al. 201416
MG	N = 15	Prone	Resting	GE	0.82	–	0.1	Konig et al. 201421

YM, young men; YW, young women; YC, young children; VL, vastus lateralis; MG, gastrocnemius medialis; TA, tibialis anterior

ICC, intra- or inter-class correlation coefficient; CI, confidence interval; SEM, standard error of measurement; NR, not reported