Stimulus Phase Duration on Discomfort and Electrically Induced Torque of Quadriceps Femoris

The Influence of Stimulus Phase Duration on Discomfort and Electrically Induced Torque of Quadriceps Femoris

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT01862393

Enrollment

Registered

2013-05-24

Start date

2008-08-31

Completion date

2008-12-31

Last updated

2016-09-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Pain Perception, Torque

Keywords

electrical stimulation, torque

Brief summary

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.

Interventions

DEVICE400 microseconds

Neuromuscular electrical stimulation with stimulus phase duration of 400 microseconds

DEVICE700 microseconds

Neuromuscular electrical stimulation with stimulus phase duration of 700 microseconds

DEVICE1000 microseconds

Neuromuscular electrical stimulation with stimulus phase duration of 1000 microseconds

Study design

Allocation

RANDOMIZED

Intervention model

CROSSOVER

Masking

SINGLE (Subject)

Eligibility

Sex/Gender

FEMALE

Age

18 Years to 35 Years

Healthy volunteers

Yes

Inclusion criteria

* sedentary healthy university students.

Exclusion criteria

* history of knee surgery or injury, * musculoskeletal, cardiovascular or neurological disease including impaired sensation.

Design outcomes

Primary

Measure	Time frame	Description
Torque	During 4 seconds of electrical stimulation	Torque will be measured using an isokinetic dynamometer. Torque will be registered in Newton meter \[N.m\]

Secondary

Measure	Time frame	Description
Discomfort	During 6 seconds of electrical stimulation	Discomfort will be measured using a 10 cm visual analogue scale (VAS) ranging from zero (no discomfort) to 10 (worst discomfort imaginable).

Countries

Brazil

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026