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MedicineKinesiologyRehabilitation MedicineExercise PhysiologyPhysical ActivityPulmonologyChronic Obstructive Pulmonary DiseaseChronic Obstructive Pulmonary Disease RehabilitationExercise TrainingObstructive Lung DiseasePhysical FitnessRespiratory RehabilitationActivity Tolerance AssessmentCopd Symptom ManagementExercise Tolerance ImprovementPulmonary Function RehabilitationSingle-blind TrialsTai Chi
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Jacob Cohen · Psychological Bulletin · 1992 · 42.2K citations
Psychophysical bases of perceived exertion
Gunnar Borg · Medicine & Science in Sports & Exercise · 1982 · 16.4K citations
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