Healthy Clinical Trial
Official title:
Muscular Adaptations After Endurance Exercise Training in Patients With COPD
The current protocol is developed in the context of a large Research and Innovation (R&I)
program aiming the promotion of daily life physical activity in chronic patients registered
at clinicaltrials.gov (NCT02976064) and approved by the ethical committee of the Hospital
Clinic de Barcelona (HCB/2016/0883). The project is partly supported by the Smart Innovation
Strategies promoted by the EU Commission (COMRDI15-1-0016). Specifically, the protocol uses
retrospective information collected between 2005-2008 as part of the EU project Biobridge
(LSHG-CT-2006-037939).
The aims of the current analysis of the retrospective information are 1) to assess
training-induced changes in muscle oxygen saturation (StO2) assessed by near-infrared
spectroscopy (NIRS) during constant-work rate cycling exercise (CWRE) as a useful marker of
the effects of training at limb muscle level in patients with chronic obstructive pulmonary
disease (COPD), and 2) to further explore underlying mechanisms of skeletal muscle
dysfunction as a characteristic systemic effect of COPD, potentially modifiable with
preventive interventions as endurance muscle training.
Methods: Incremental exercise (VO2 peak) and CWRE at 70% baseline peak work rate, before and
after 8-week of endurance exercise training, were done in healthy sedentary subjects and
COPD patients. NIRS was used to assess StO2 in the left "vastus internus" during the CWRE
(before an after training program) (objective 1); and blood samples and muscle biopsies of
the quadriceps were obtained at rest (before an after training program) (objective 2).
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