Abstract
Peak oxygen uptake (˙VO 2peak ) is an important factor contributing to running performance. Wearable technology may allow the assessment of ˙VO 2peak more frequently and on a larger scale. We aim to i) validate the ˙VO 2peak assessed by a smartwatch (Garmin Forerunner 245), and ii) discuss how this parameter may assist to evaluate and guide training procedures. A total of 23 runners (12 female, 11 male; ˙VO 2peak : 48.6±6.8 ml∙min −1 ∙kg −1 ) visited the laboratory twice to determine their ˙VO 2peak during a treadmill ramp test. Between laboratory visits, participants wore a smartwatch and performed three outdoor runs to obtain ˙VO 2peak values provided by the smartwatch. The ˙VO 2peak obtained by the criterion measure ranged from 38 to 61 ml∙min −1 ∙kg −1 . The mean absolute percentage error (MAPE) between the smartwatch and the criterion ˙VO 2peak was 5.7%. The criterion measure revealed a coefficient of variation of 4.0% over the VO2peak range from 38–61 ml∙min −1 ∙kg −1 . MAPE between the smartwatch and criterion measure was 7.1, 4.1 and −6.2% when analyzing ˙VO 2peak ranging from 39–45 ml∙min −1 ∙kg −1 , 45–55 ml∙min −1 ∙kg −1 or 55–61 ml∙min −1 ∙kg −1 , respectively.
Highlights
Peak oxygen uptake (VO2peak) is extensively investigated among individuals of different age, gender, and performance levels [1,2,3,4] and is a key component of endurance performance in heterogeneous populations
Wearable sensors used in research settings (e. g., a combination of an accelerometer worn on the tibia and a heart rate sensor) employing a mixed-effects unpenalized linear regression model allow the estimation of VO2peak with an error of 4.92 % in the laboratory [9]
These sensors and algorithms may not be available to the public, and few studies have evaluated the validity of VO2peak measurements with end consumer wearables (e. g., smartwatches) [10, 11]
Summary
Peak oxygen uptake (VO2peak) is extensively investigated among individuals of different age, gender, and performance levels [1,2,3,4] and is a key component of endurance performance in heterogeneous populations. The accurate assessment of VO2peak requires i) time-consuming and expensive laboratory setup for gas exchange measurement, ii) specialized laboratory staff, and iii) an all-out effort by the participant These disadvantages impair frequent assessment of VO2peak, especially for recreational runners without access to such equipment. G., a combination of an accelerometer worn on the tibia and a heart rate sensor) employing a mixed-effects unpenalized linear regression model allow the estimation of VO2peak with an error of 4.92 % in the laboratory [9] These sensors and algorithms may not be available to the public, and few studies have evaluated the validity of VO2peak measurements with end consumer wearables Recreational runners will need some level of knowledge on how to interpret changes in VO2peak to guide their training [14]
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