Relationship between daily physical activity and aerobic fitness in adults with cystic fibrosis

BMC Pulmonary Medicine

Paolo Palange⁵  Pierantonio Laveneziana³  Banya Winston⁴  Serena Quattrucci¹  Mattia Internullo⁶  Paolo Onorati⁶  Nicholas Simmonds²  Marcello Di Paolo⁶  Daniela Savi¹ 

[1] Department of Pediatrics and Pediatric Neurology, Cystic Fibrosis Center, Sapienza University of Rome, Rome, 00185, Italy;Department of Cystic Fibrosis, Royal Brompton Hospital and Imperial College, SW3 6NP, London, UK;AP-HP, Groupe Hospitalier Pitié-Salpêtrière Charles Foix, Service des Explorations Fonctionnelles de la Respiration, de l’Exercice et de la Dyspnée, Paris, 75013, France;NIHR Respiratory BRU, Royal Brompton Hospital NHS Foundation Trust, SW3 6NP, London, UK;Eleonora Lorrillard-Spencer Cenci Foundation, Rome, Italy;Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, 00185, Italy

关键词: Exercise fitness;    Lactic threshold;    Daily physical activity;   

Others  :  1182376
DOI  :  10.1186/s12890-015-0036-9

 received in 2015-01-16, accepted in 2015-04-15,  发布年份 2015

【 摘 要 】

Background

The best clinical practice to investigate aerobic fitness includes measurements obtained during cardiopulmonary exercise testing (CPET), however it remains an underutilised clinical measure in cystic fibrosis (CF). To investigate this further, different methods of quantifying exercise capacity in CF are required. The possibility that measuring physical activity (PA) by a portable accelerometer could be used to assess the CF aerobic state and could be added among the CPET surrogates has not been investigated. The aim of this study was to examine the relationship between PA and exercise fitness both at submaximal and maximal levels in clinically stable adults with CF.

Methods

Thirty CF patients (FEV₁ 71 ± 19% predicted) and fifteen healthy controls undertook an incremental CPET on a cycle ergometer. CPET-related measurements included: oxygen uptake (V’O₂), carbon dioxide production (V’CO₂), ventilatory profile, heart rate (HR) and oxygen pulse (V’O₂/HR) throughout exercise and at lactic threshold (LT) and peak. LT measures represent submaximal exercise related data. PA was assessed using the accelerometer SenseWear Pro3 Armband.

Results

Moderate (>4.8 metabolic equivalents (METS)) and moderate + vigorous (>7.2 METS) PA was related to V’O₂ (p = 0.005 and p = 0.009, respectively) and work rate (p = 0.004 and p = 0.002, respectively) at LT. Moderate PA or greater was positively related to peak V’O₂ (p = 0.005 and p = 0.003, respectively). Daily PA levels were similar in CF and healthy controls. Except for peak values, V’O₂ profile and the V’O₂ at LT were comparable between CF and healthy controls.

Conclusions

In adult CF patients daily PA positively correlated with aerobic capacity. PA measurements are a valuable tool in the assessment of exercise performance in an adult CF population and could be used for interventional exercise trials to optimize exercise performance and health status. PA levels and parameters obtained at submaximal exercise are similar in CF and in healthy controls.

【 授权许可】

   
2015 Savi et al.; licensee BioMed Central.

【 图 表 】

Figure 1.

Figure 2.

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