Chronic Obstructive Pulmonary Disease
Conditions
Keywords
COPD
Brief summary
This study was designed to test the following hypothesis: To investigate whether COPD muscles can respond to stimuli in terms of changes in fiber-type distribution.
Detailed description
Background: Muscle dysfunction is a major problem in chronic obstructive pulmonary disease (COPD). It is characterized by muscle fiber-type redistribution and oxidative stress. Classical training does not improve these features. Objectives: To investigate whether electrostimulation program following exacerbation can modify muscle structure and function in COPD patients. Method: We propose to conduct a controlled and randomized clinical trial comparing the efficacy of muscle electrostimulation training of the lower limbs to sham training in 15 patients with COPD. Patients are included in either 6 weeks of electrostimulation training (active treatment group) or 6 weeks of sham electrostimulation. Primary outcomes were changes in muscle structure, muscle oxidative stress and their relationship with quadriceps force and exercise tolerance.
Interventions
Electrostimulation: 35 Hz, 0.4 ms, 1 h; 5 times/week
Sham stimulation: 1 h; 5 times/week
Sponsors
Study design
Eligibility
Inclusion criteria
* COPD patients during or after exacerbation
Exclusion criteria
* Comorbidities that could limit exercise training * Obesity (body mass index \[BMI\] \> 30 kg/m²) * Neuromuscular disease * Pacemaker implantation
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Fiber-type distribution | 6 to 8 weeks | Typology was evaluated by immunohistochemistry |
Secondary
| Measure | Time frame |
|---|---|
| Change in the strength of the quadriceps over the 6-week electrostimulation program | 6 to 8 weeks |