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. 2020 Oct 30;20(1):285.
doi: 10.1186/s12890-020-01313-5.

New strategies of physical activity assessment in cystic fibrosis: a pilot study

Daniela Savi  1   2 , Luigi Graziano  3 , Barbara Giordani  4 , Stefano Schiavetto  3 , Corrado De Vito  3 , Giuseppe Migliara  3 , Nicholas J Simmonds  5 , Paolo Palange  3 , J Stuart Elborn  6
Affiliations

New strategies of physical activity assessment in cystic fibrosis: a pilot study

Daniela Savi et al. BMC Pulm Med. .

Abstract

Background: Regular physical activity (PA) is a valued part of cystic fibrosis (CF) care. Although the accelerometer, SenseWear Armband (SWA), accurately measures habitual PA in CF, it is mostly used for research purposes. For the first time, we analyzed different methods of measuring PA in daily life by the use of smartphones and other electronic devices such as smartwatch and Fitbit.

Methods: Twenty-four stable adults with CF (mean age 37.5 ± 11.5SD yrs.; FEV1 58 ± 19% predicted, BMI 22.9 ± 3.2) were studied. Daily PA was monitored for seven consecutive days. All patients wore the accelerometer SWA and at the same time they monitored PA with the electronic device they used routinely. They were allocated into one of four arms according to their device: Smartwatch, Fitbit, Android smartphones and iOS smartphones. PA related measurements included: duration of PA, energy expenditure, number of steps.

Results: There was a good agreement between SWA and Fitbit for number of steps (p = 0.605) and energy expenditure (p = 0.143). iOS smartphones were similar to SWA in monitoring the number of steps (p = 0.911). Significant differences were found between SWA and both Smartwatch and Android smartphones.

Conclusions: Fitbit and iOS smartphones seem to be a valuable approach to monitor daily PA. They provide a good performance to measure step number compared to SWA.

Keywords: Accelerometer; Cystic fibrosis; Daily physical activity; Electronic devices.

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Conflict of interest statement

NJS has consulted for Vertex Pharmaceuticals, Gilead, Teva, Roche, Chiesi, Pulmocide and PTC Therapeutics. The other authors declare that they have no financial and personal relationships with other people or organizations that could inappropriately influence their work.

Figures

Fig. 1
Fig. 1
Fitbit Agreements. a: Average agreement and limits of agreement between SWA and Fitbit for active energy expenditure; b: Average agreement and limits of agreement between SWA and Fitbit for number of steps. (Authors’ source)
Fig. 2
Fig. 2
iOS Smartphone Agreements. Average agreement and limits of agreement between accelerometer SWA and iOS Smartphone for number of steps. (Authors’ source)
See this image and copyright information in PMC

References

    1. Dwyer TJ, Elkins MR, Bye PT. The role of exercise in maintaining health in cystic fibrosis. Curr Opin Pulm Med. 2011;17:455–460. - PubMed
    1. Shelley J, Boddy LM, Knowles ZR, Stewart CE, Dawson EA. Physical activity and associations with clinical outcome measures in adults with cystic fibrosis; a systematic review. J Cyst Fibros 2019. pii: S1569–S1993(18)30898–1. doi: 10.1016/j.jcf.2019.03.003. - PubMed
    1. Baldwin DR, Hill AL, Peckam DG, Knox AJ. Effect of addition of exercise to chest physiotherapy on sputum expectoration and lung function in adults with cystic fibrosis. Respir Med. 1994;88:49–53. doi: 10.1016/0954-6111(94)90174-0. - DOI - PubMed
    1. Burtin C, Van Remoortel HV, Vrijsen B, Langer D, Colpaert K, Gosselink R, et al. Impact of exacerbations of cystic fibrosis on muscle strength. Respir Res. 2013;14:46. doi: 10.1186/1465-9921-14-46. - DOI - PMC - PubMed
    1. van de Weert-van Leeuwen PB, Arets HG, van der Ent CK, Beekman JM. Infection, inflammation and exercise in cystic fibrosis. Respir Res. 2013;14:32. doi: 10.1186/1465-9921-14-32. - DOI - PMC - PubMed