Study on Impact of Maximal Strength Training in Patients With COPD
Study on Impact of Maximal Strength Training in Patients With COPD: Physiological and Clinical Implications
Istituti Clinici Scientifici Maugeri SpA
20 participants
Sep 18, 2019
INTERVENTIONAL
Conditions
Summary
In the context of pulmonary rehabilitation of COPD patients, recent guidelines and metanalysis describe that Resistance Training (RT) can be successfully performed alone or in conjunction with Endurance Training (ET) without evidence of adverse events. Maximal Strength Training (MST) is a kind of RT typically performed at \~85-90% of 1RM with maximal velocity to be developed in the concentric phase. Recent literature indicates a significant amelioration on the Rate of Force Development (RFD) after MST in healthy subjects, post-menopausal woman and older populations. When comparing to the conventional ET, MST generates a little change in muscle mass (no hypertrophy), but a much greater improvement in the RFD. It has been described that neural adjustments play a major role in the MST-induced adaptations. MST is also well documented to improve aerobic endurance by improving walking work efficiency. Only a small cohort study of COPD patients was conducted, describing that MST can meaningfully improve strength and RFD, with an increase of around 32% for mechanical efficiency and a decrease of the perceived effort during submaximal job. This improvement could determine best performances in daily activities and a best quality of life. The main aims of this physiological pilot randomized controlled trail will be to evaluate feasibility and efficacy of the MST compared to standard ET on strength, effort tolerance, fatigue, economy of walking, dyspnea and risk of falls in a populations of COPD patients, in a short and middle term (6 months).
Eligibility
Inclusion Criteria2
- COPD clinical definition according to GOLD guidelines with forced expiratory volume (FEV1)/ forced vital capacity (FVC) \< 70%, and FEV1 \< 50% of predicted
- stable clinical condition
Exclusion Criteria5
- pulmonary diseases other than COPD
- type II diabetes or other metabolic diseases
- malign disease
- a respiratory tract infection within the last 4 wks
- long oxygen therapy use.
Interventions
Patients will perform an addictive out-patients rehabilitative treatment of 8 weeks (3 times/week, ≥20 training sessions) consisting of: 1. MST- It will consist of four sets of five repetitions on a leg-press with a focus on the rate of force development during the concentric contraction of the quadriceps from a 90° to legs complete extension. The load will be 85-90% of 1RM. When a patient will be able to perform more than five repetitions in a set, the load will be increased. All strength training will be performed on a seated horizontal leg press. 2. ET - A cycling session will follow the MST and last 40 minutes at constant-load, starting from a load intensity corresponding to patient specific AT. The intensity will be gradually increased with a symptom-based progression.
Patients will perform a usual out-patients rehabilitative treatment of 8 weeks (3 times/week, ≥20 training sessions). They will perform ET by cycling sessions that will last 40 minutes/each at constant-load, starting from a load intensity corresponding to patient specific AT, assessed during the baseline incremental test. The intensity will be gradually increased during the sessions with a symptom-based progression, according to the protocol by Maltais and coworkers. A 3-min warm-up and cool-down will be provided. Heart rate (HR), blood pressure, oxygen pulsoxymetry, and symptoms by Borg CR10 scale will be monitored at the beginning and end of each session. Out of the training-days, both groups will continue their normal daily living with modest regular activity, as recommended by their physician.
Locations(1)
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NCT03799354