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This study aims to examine the variation in muscle torque and discomfort produced when electrically stimulating quadriceps femoris using pulsed current with three different phase durations in order to establish whether there are any advantages or disadvantages in varying the phase duration over the range examined.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| 400 microseconds | Experimental | Electrically-induced torque generated with stimulus phase duration set at 400 microseconds. |
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| 700 microseconds | Experimental | Electrically-induced torque generated with stimulus phase duration set at 700 microseconds. |
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| 1000 microseconds | Experimental | Electrically-induced torque generated with stimulus phase duration set at 1000 microseconds. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| 400 microseconds | Device | Neuromuscular electrical stimulation with stimulus phase duration of 400 microseconds |
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| Measure | Description | Time Frame |
|---|---|---|
| Torque | Torque will be measured using an isokinetic dynamometer. Torque will be registered in Newton meter [N.m] | During 4 seconds of electrical stimulation |
| Measure | Description | Time Frame |
|---|---|---|
| Discomfort | Discomfort will be measured using a 10 cm visual analogue scale (VAS) ranging from zero (no discomfort) to 10 (worst discomfort imaginable). | During 6 seconds of electrical stimulation |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Richard E Liebano, PhD | Universidade Cidade de Sao Paulo | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Universidade Cidade de São Paulo | São Paulo | São Paulo | 03071-000 | Brazil |
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| 700 microseconds | Device | Neuromuscular electrical stimulation with stimulus phase duration of 700 microseconds |
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| 1000 microseconds | Device | Neuromuscular electrical stimulation with stimulus phase duration of 1000 microseconds |
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