Randomized Controlled Study to Investigate the Impact of Different Intensities Training on ADL and BODE Index in COPD

Study Overview
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Brief Summary
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The local and systemic manifestations that affect patients with Chronic Obstructive Pulmonary Disease (COPD) cause severe dyspnoea and limitation of functional capacity, leading to impairment in the performance of activities of daily living (ADL). The combination of aerobic and resistance training, for both upper limbs (UL) and lower limbs (LL), appears to be the physiologically most complete resource for improving quality of life and increased survival of these patients. Therefore, the aim of the study is to assess the impact of aerobic and resistance training of different intensities on the performance and dyspnoea during activities of daily living and prediction of mortality in patients with COPD. There will be include 45 COPD patients with moderate to severe obstruction, aged between 50-80 years of both gender. All patients will undergo to the following assessments and reassessments: history and anthropometric data, Scale London Chest Activity of Daily Living Scale (LCADL), modified Medical Research Council (mMRC), BODE index, test peripheral muscle strength, mobility and balance tests, 6-minute walk test (6MWT), Circuit ADL Test, 1 repetition maximum (1RM) and Incremental Cardiopulmonary Testing (ICPT). Patients will be randomly divided into two groups and undergo to the treatment program will consist of sessions lasting approximately 1 hour, three times a week for 12 consecutive weeks, totaling 36 sessions. All patients will undergo general stretching and aerobic training on a cycle ergometer with the intensity between 70-80 % of the maximum load achieved in ICPT. After aerobic training, a group of patients will achieve a protocol of low-intensity resistance training (LI-RT), with emphasis on gaining muscle strength, and the other group will be submitted to a protocol of high intensity (HI-RT), aiming greater gain in muscle strength. The calculation of the intensity of training will be conducted by the 1RM test. After the training protocol, it is expected to find improved performance and dyspnoea during activities of daily living and reduction of BODE index for both groups, however, it is expected that the group of low-intensity resistance training presents greater benefits in ADL.

Official Title
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Impact of Aerobic and High and Low Resistance Training on Daily Life Activities and BODE Index COPD Patients

Conditions
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Chronic Obstructive Pulmonary Disease

Intervention / Treatment
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* Behavioral: Low intensity resistance training
* Behavioral: High intensity resistance training
* Behavioral: Aerobic training


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria:Patients both genders, with a clinical diagnosis of COPD confirmed by post bronchodilator spirometry administered by a pneumologist, classified as moderate to very severe obstruction in accordance with the GOLD criteria; ex- or non-smokers; oxygen dependent or not; clinically stable; no history of infection and no exacerbation of respiratory symptoms or changes in medication for at least two months before the study and that no present cardiac, rheumatic or an associated orthopedic disease that prevent them from performing the proposed evaluation tasks. Exclusion Criteria:Patients who present respiratory, cardiac, rheumatic, musculoskeletal, orthopedic and neuromuscular sequels that may prevent the testing and intervention proposal; that to modify the type of medication during the study; in cases of uncontrolled hypertension or refusal to provide consent proposed in the Resolution of National Council of Health.

Ages Eligible for Study
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Minimum Age: 50 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Low intensity resistance training<br>Low intensity resistance training + aerobic training | Behavioral: Low intensity resistance training<br>* The LIRT group initiated the resistance training for UL with 30% of the 1RM, with 5% increases each nine sessions; therefore, the maximum load was 45% of the 1RM. The LL training initiated with 30% of the 1RM, increasing 7% each nine sessions, thus, the maximum load was 51% of the 1RM. Each exercise session consisted of three sets of 15 repetitions, with a 2 minutes interval between sets.<br>* Other names: Low-intensity resistance training;Behavioral: Aerobic training<br>* Patients underwent an aerobic training in cycle ergometer, with load intensity determined as the same load the patient presented a VO2 value of 70-80% of the peak VO2 obtained in the symptom-limited CPET. Each session of aerobic training lasted 20-30min according to patient's tolerance.<br>* Other names: AT;|
| Experimental: High intensity resistance training<br>High intensity resistance training + aerobic training | Behavioral: High intensity resistance training<br>* the initial load for HIRT group was 60% of 1RM for UL with 5% increases each nine sessions; therefore, the maximum load reached 75% of the 1RM. The LL training initiated with 60% of the 1RM with 7% increments each nine sessions, as a result, the maximum load after 36 sessions was 81% of the 1RM. These patients underwent three sets of eight repetitions, with two minutes intervals between sets.<br>* Other names: High-intensity resistance training;Behavioral: Aerobic training<br>* Patients underwent an aerobic training in cycle ergometer, with load intensity determined as the same load the patient presented a VO2 value of 70-80% of the peak VO2 obtained in the symptom-limited CPET. Each session of aerobic training lasted 20-30min according to patient's tolerance.<br>* Other names: AT;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in Oxygen Saturation During Activities of Daily Living | TThe ADL performance was assessed by an adapted laboratory circuit of ADL, including: Showering, lifting and lowering containers on a shelf above the shoulder girdle, and raising and lowering pots on a shelf below the pelvic girdle. Oxygen saturation (SpO2, %) was assessed by pulse oxymeter. | Baseline and after 36 sessions, an average of 3 months | 
| Change in Ventilation During Activities of Daily Living | The ADL performance was assessed by an adapted laboratory circuit of ADL, including: Showering, lifting and lowering containers on a shelf above the shoulder girdle, and raising and lowering pots on a shelf below the pelvic girdle. Ventilation (VE-l/min) was captured by a portable metabolic system. | Baseline and after 36 sessions, an average of 3 months | 
| Change in Oxygen Consumption During Activities of Daily Living | The ADL performance was assessed by an adapted laboratory circuit of ADL, including: Showering, lifting and lowering containers on a shelf above the shoulder girdle, and raising and lowering pots on a shelf below the pelvic girdle. Gas exchange (oxygen consumption - VO2-l/min) was captured by a portable metabolic system. | Baseline and after 36 sessions, an average of 3 months | 
| Change in Dyspnea Related During Activities of Daily Living | Dyspnea in ADL was assessed by London Chest Activity of Daily Living Scale(LCADL), that consists 15 quantitative questions of 4 domains: self-care, domestic, physical, and leisure. Subjects indicate a score of 0-5, in a total of 75 points. A higher total score indicates greater limitation in performing ADL due to dyspnea. | Baseline and after 36 sessions, an average of 3 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in BODE index | In order to calculate the BODE index, the following variables were considered: BMI (body mass index), forced expiratory volume in one second, as the percentage of the predicted value (pred FEV1 %), mMRC score (modified Medical Research Council Scale) and in the 6MWD (Six-Minute Walk Distance). The score was considered according to the results obtained from the four variables (0-3 for FEV1; 0-3 for mMRC; 0-3 for 6MWD and 0-1 for BMI), and total score ranged from 0 to 10 (higher scores indicate more severity). | Baseline and after 36 sessions, an average of 3 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Chronic Obstructive Pulmonary Disease, Activities of Daily Living, Mortality, Strength Training