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Table 4 Inter-rater intraclass correlation coefficients and standard errors of measurements for muscle architecture

From: Age- and muscle-specific reliability of muscle architecture measurements assessed by two-dimensional panoramic ultrasound

ICCs

Gastrocnemius medialis

Tibialis anterior

Vastus lateralis

PA

FL

MT

PA

FL

MT

PA

FL

MT

Young

 Rest

0.86* (0.69–0.96)

0.76* (0.27–0.93)

0.98* (0.96–0.99)

0.85* (0.36–0.96)

0.64* (0.00–0.89)

0.98* (0.86–1.00)

0.72* (0.28–0.92)

0.81* (0.21–0.95)

0.98* (0.88–0.99)

 Contraction

0.93* (0.80–0.98)

0.97* (0.91–0.99)

0.99* (0.97–1.00)

0.65* (0.13–0.89)

0.86* (0.37–0.96)

0.99* (0.97–1.00)

0.75* (0.37–0.92)

0.67* (0.13–0.90)

0.91* (0.72–0.97)

Old

 Rest

0.84* (0.57–0.95)

0.84* (0.53–0.95)

0.99* (0.97–1.00)

0.90* (0.65–0.97)

0.67* (0.08–0.90)

0.98* (0.92–1.00)

0.55 (− 0.11–0.86)

0.37 (− 0.13–0.77)

0.99* (0.96–1.00)

 Contraction

0.77* (0.42–0.93)

0.88* (0.67–0.96)

0.99* (0.96–1.00)

0.85* (0.57–0.95)

0.86* (0.41–0.96)

0.97* (0.90–0.99)

0.44 (− 0.09–0.81)

0.22 (− 0.29–0.65)

0.94* (0.80–0.98)

SEMs

PA (°)

FL (cm)

MT (cm)

PA (°)

FL (cm)

MT (cm)

PA (°)

FL (cm)

MT (cm)

Young

 Rest

1.83 (9.79)

0.55 (10.73)

0.06 (3.82)

1.40 (14.25)

0.70 (11.22)

0.05 (4.70)

1.44 (10.84)

1.44 (11.88)

0.10 (3.87)

 Contraction

1.52 (6.96)

0.31 (6.90)

0.06 (3.61)

2.89 (22.05)

0.54 (9.89)

0.04 (3.82)

2.37 (18.66)

2.04 (18.29)

0.17 (6.67)

Old

 Rest

1.80 (11.15)

1.84 (28.09)

0.06 (3.52)

1.29 (10.93)

0.93 (14.27)

0.04 (3.45)

2.60 (24.52)

3.95 (36.02)

0.07 (3.46)

 Contraction

3.63 (19.06)

1.03 (19.37)

0.06 (3.70)

2.02 (13.57)

0.54 (9.58)

0.05 (4.09)

2.55 (25.83)

4.05 (34.04)

0.09 (4.52)

  1. Intraclass correlations (ICCs) are expressed with 95% confidence intervals shown between brackets. Relative standard error of measurement (SEM%) are shown next to the Standard error of measurement (SEM)-value between brackets
  2. PA pennation angle, FL fascicle length, MT muscle thickness
  3. ICCS were P < 0.05 are highlighted with an *