The degree of arm elevation impacts the endurance and cardiopulmonary adaptations of COPD patients performing upper-limb exercise: a cross-over study

Mara Paneroni, Carla Simonelli, Pierantonio Laveneziana, Massimiliano Gobbo, Manuela Saleri, Luca Bianchi, Michele Vitacca

Research output: Contribution to journalArticle

Abstract

BACKGROUND: In Chronic Obstructive Pulmonary Disease (COPD), upper limb exercise is widely recommended. However, how the degree of shoulder flexion may influence the exercise response is unknown.

AIM: We compared metabolic, ventilatory and symptomatic responses during constant-load supported and unsupported exercise performed at 80° and 120° arm elevation.

DESIGN: Randomized cross-over study.

SETTING: Pulmonary Pathophysiology Service in an Italian Respiratory Rehabilitative Division, in-patients were enrolled.

METHODS: Twelve patients with moderate-to-severe COPD (FEV1 51%, BMI 26.7 ± 6.3 Kg/m2) performed 4 symptom-limited constant-load tests at 70% of their individual maximal workload: 2 supported and 2 unsupported, respectively at 80° and 120° of glenohumeral joint flexion, executed in a random order.

RESULTS: Time to exhaustion (Tlim), evaluated by Kaplan-Maier curve, was shorter at 120° than 80° arm elevation in both supported (360 vs.. 486 seconds, p=0.031) and unsupported exercise (210 vs.. 375 seconds, p=0.005). No difference in dynamic hyperinflation was found between 80° and 120° elevation, even at the peak of exercise and at iso-ventilation. When normalized to Tlim, 120° arm elevation had a significantly higher metabolic cost, heart rate, minute ventilation and dyspnea/fatigue symptoms compared to 80° elevation, both in unsupported and supported conditions.

CONCLUSIONS: A larger shoulder flexion shortens per se exercise endurance due to the increased metabolic, ventilatory and cardiac response, without worsening dynamic hyperinflation.

CLINICAL REHABILITATION IMPACT: Arm position should be considered when prescribing individual exercise training and may be adjusted to modulate the workload.

Original languageEnglish
Pages (from-to)690-697
Number of pages8
JournalEuropean Journal of Physical and Rehabilitation Medicine
Volume54
Issue number5
DOIs
Publication statusPublished - Oct 2018

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Keywords

  • Aged
  • Arm/physiology
  • Cross-Over Studies
  • Dyspnea/etiology
  • Exercise Therapy/methods
  • Exercise Tolerance
  • Female
  • Humans
  • Male
  • Muscle Strength
  • Pulmonary Disease, Chronic Obstructive/physiopathology
  • Quality of Life

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