Fig 1.
Position of lower limb during ultrasonography.
Fig 2.
Ultrasound image from a right medial head of gastrocnemius of a participant, showing an example of the points plotted (⊕) for superficial aponeurosis borders, deep aponeurosis borders, and a selected fascicle length and corresponding pennation angle.
Fig 3.
Protocols for reliability analyses.
Fig 4.
Bland-Altman plots showing the differences between Investigator A and Investigator B log10 measurements in relation to the mean of Investigator A and Investigator B measurements.
Dashed lines indicate the mean bias and the upper and lower 95% limits of agreement. Fascicle length, pennation angle, and muscle thickness measurement comparisons for the gastrocnemius medialis are represented by a. b. and c. respectively, and the gastrocnemius lateralis represented by d. e. and f.
Table 1.
Gastrocnemius medialis and gastrocnemius lateralis median (IQR) values and inter-rater reliability results for fascicle length, pennation angle and muscle thickness lengths.
Fig 5.
Inter-rater-test-retest Bland-Altman plots of the differences of log-transformed measurements between test session 1 and test session 2 in relation to the mean of test session 1 and test session 2 measurements.
Dashed lines indicate the mean bias and the upper and lower 95% limits of agreement. Fascicle length, pennation angle, and muscle thickness measurement comparisons for the gastrocnemius medialis are represented by a. b. and c. respectively, and the gastrocnemius lateralis represented by d. e. and f.
Table 2.
Test-retest reliability for fascicle length, pennation angle and muscle thickness of the gastrocnemius medialis and gastrocnemius lateralis muscles.