In:
German Journal of Exercise and Sport Research, Springer Science and Business Media LLC, Vol. 51, No. 1 ( 2021-03), p. 49-62
Abstract:
In view of their motivating effect, wearable devices promise to provide an important contribution to individual`s maintenance of physical activity and thus, to the strengthening of health- and performance-relevant parameters in times of digital change. The overall aim of the present study was to evaluate the psychometric properties of wearable devices using a strong selling product of one of the markets key-players, the Garmin fēnix® 5. The reliability aspect of method concordance was identified as a research desideratum. To evaluate method concordance, stress level under cognitive stress exposure, energy expenditure during moderate running as well as maximum oxygen uptake during running of 30 male participants (age: 23.13 ± 2.5 years; BMI: 24.95 ± 2.45 kg/m²) as measured by the Garmin fēnix® 5 was compared with these parameters on the basis of the commonly accepted reference methods electrocardiography, indirect calorimetry and spiroergometry using Lin’s Concordance Correlation Coefficient ( CCC Lin ). Following our results, the Garmin fēnix® 5 does provide a high precision when compared to the reference method electrocardiography and with regard to the measurement of the necessarily z-standardized stress parameter ( p = 0.89). Moreover, indications for just moderate exact intraindividual concordance between the Garmin fēnix® 5 and its respective reference method indirect calorimetry and spiroergometry regarding the parameters energy expenditure ( CCC Lin = 0.43 [ p = 0.52, C b = 0.82]) and maximum oxygen uptake ( CCC Lin = 0.50 [ p = 0.77, C b = 0.66]) were found. Therefore, the Garmin fēnix® 5 cannot be recommended as a sufficiently concordant alternative to the established activity- and performance-related reference methods, at least when used for the first time.
Type of Medium:
Online Resource
ISSN:
2509-3142
,
2509-3150
DOI:
10.1007/s12662-020-00682-7
Language:
German
Publisher:
Springer Science and Business Media LLC
Publication Date:
2021
detail.hit.zdb_id:
2879774-7
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