Key result
The Instant Heart Rate smartphone application demonstrated high validity for measuring heart rate during exercise, with the Lenovo/Android system showing a stronger correlation (r = 0.98) than the iPhone/iOS system (r = 0.87).
Why the study?
The study was conducted to verify the validity of the Instant Heart Rate application in smartphones for measuring heart rate during exercise.
Does the Instant Heart Rate smartphone application accurately measure heart rate during exercise?
Cross-Sectional (n=48)
No
Does the Instant Heart Rate smartphone application accurately measure heart rate during exercise?
Effect estimate: r = 0.98 (95% CI 0.94-0.99)
p-value: p=0.001
The Instant Heart Rate smartphone application provides reliable heart rate monitoring during exercise, with the Android version demonstrating slightly higher accuracy than the iOS version.
Accuracy varies by device in smartphone HR apps during exercise; leaves open reliability for clinical use pending validation.
Purpose To verify the validity of Instant Heart Rate® application in smartphones for the measurement of exercise heart rate. Methods The individuals were initially instructed about all the procedures to be performed and signed the consent form. Anthropometric measures and rest heart rate were evaluated before the experimental session of the study. The subjects participated in a self-selected exercise on a cycle ergometer for 10 minutes. Results The results for validity demonstrated in an iPhone/iOS® smartphone revealed the intra-class correlation coefficient of r = 0.87 with a tendency to overestimate the heart rate by 5 bpm. For the Lenovo/Android® model, the intra-class correlation coefficient was r = 0.98, underestimating the values by –0.7 bpm. Thus, both systems presented high correlation values, and the error observed did not seem to compromise the several measures that use heart rate as a parameter. Conclusions It is possible to conclude that heart rate monitoring by the Instant Heart Rate® application on iPhone/iOS® and Lenovo/Android® operating system smartphones can be performed safely during exercise, with the Lenovo/Android® base being even more reliable than the iPhone/iOS® system.
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Vasconcelos et al. (2020) conducted a cross-sectional in Healthy university students (n=48). Instant Heart Rate smartphone application vs. Polar RS800CX heart rate monitor was evaluated on Validity of heart rate measurement during exercise (correlation with criterion measure) (r = 0.98, 95% CI 0.94-0.99, p=0.001). The Instant Heart Rate smartphone application demonstrated high validity for measuring heart rate during exercise, with the Lenovo/Android system showing a stronger correlation (r = 0.98) than the iPhone/iOS system (r = 0.87).
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