Standardizing fatigue-resistance testing during electrical stimulation of paralysed human quadriceps muscles, a practical approach

Table 2 Torque levels and stimulation intensity during fatigue testing

Electrode Configuration		CONV1	POS2	POS3	POS4	CONV2
Normalized Initial peak Torque	% of MEC	41.6 ± 2.7	39.1 ± 4.7	36.7 ± 2.9	39.4 ± 1.5	39.1 ± 2.7
Intensity at 40% MEC	mA	70.3 ± 10.1	59.7^* ± 3.3	50.2^* ± 4.0	53.2^* ± 5.3	66.8 ± 5.4

For the fatigue testing the stimulation amplitude was set to elicit contractions with a peak torque of 40% MEC. The table shows the normalized initial peak torque (average of the first 10 contractions) along with its corresponding stimulation amplitude. Data is represented as mean ± SD for each electrode configuration (n = 6). Fatigue measurements using the conventional electrode configuration were conducted as baseline measurements at the first (CONV1) and last (CONV2) session for each subject. Values marked with an asterisk (*) were statistically significant against CONV1 and CONV2.

ISSN: 1743-0003