TABLE A1.

Comparison of the resting passive and peak active values between trials.

	Pretest	5 kg	10 kg	Post-test	Significance
Pennation angle (°)
Passive	19.4 ± 2.0	18.7 ± 2.7	18.1 ± 2.4	19.2 ± 2.4	*,†, +, @
Active	20.9 ± 2.1	21.5 ± 3.4	21.0 ± 3.7	20.7 ± 3.3
Change	2.7 ± 1.5	3.8 ± 1.4	3.8 ± 1.5	3.1 ± 1.4	*,†,‡
Muscle thickness (mm)
Passive	18.9 ± 3.2	18.7 ± 3.5	18.1 ± 3.3	19.1 ± 3.2	†,‡, +, @
Active	20.7 ± 3.2	20.6 ± 3.3	20.1 ± 3.1	21.0 ± 3.2	†,‡, +, @
Change	1.8 ± 0.7	2.0 ± 0.9	2.2 ± 1.4	1.9 ± 0.7
Transverse wavelength (mm)
Passive	4.9 ± 1.6	4.5 ± 1.9	4.5 ± 1.8	5.0 ± 1.5
Active	4.6 ± 2.0	4.6 ± 1.6	3.9 ± 1.6	4.5 ± 1.6	±
Change	1.4 ± 0.7	1.9 ± 1.0	2.0 ± 1.2	1.7 ± 0.9	*,†
Fascicle length (mm)
Passive	57.2 ± 10.2	59.1 ± 12.6	59.2 ± 11.3	59.2 ± 12.6	†
Active	60.0 ± 11.9	58.9 ± 13.0	58.7 ± 14.5	61.8 ± 13.2
Change	7.0 ± 2.9	8.4 ± 3.9	8.6 ± 5.5	8.6 ± 3.8	|

Means and standard deviations are given for the pennation angles, muscle thicknesses, fascicle wavelengths, and fascicle lengths. Significances are indicated between pre-test and 5 kg (^∗), pre-test and 10 kg (†), pre-test and post-test (|), 5 kg and 10 kg (±), 5 kg and post-test (‡), and 10 kg and post-test (+).