Award Date


Degree Type


Degree Name

Master of Science (MS)


Kinesiology and Nutrition Sciences

First Committee Member

James Navalta

Second Committee Member

John Mercer

Third Committee Member

Tedd Girouard

Fourth Committee Member

Kai-Yu Ho

Number of Pages



Wearable technology is an emerging fitness trend where the technology which supports it lacks validity verification. Furthermore, heart rate validity of these devices vary greatly when observed in laboratory settings vs. field testing. Secondarily, Consumer Technology Association guidelines require a minimum five minute trial for wearable testing. This study examined heart rate data of previously tested wearable devices (Garmin Fenix 5, Jabra Elite Sport, Motiv Ring, Scosche Rhythm+) in an outdoor setting to further understand their performance, and to examine the relationship of the five minute regulation. Two separate algorithms were applied to the original data set, the first shortened the data to consist of the first five minutes of each trial. The second algorithm eliminated values that were outside of a range from the criterion (10% above the criterion or 10% below the criterion). Results of the first five minutes validity measures showed no change in validity decisions for the Garmin Fenix 5, Jabra Elite Sport, and Motiv Ring, confirming the regulation is sufficient time to determine heart rate validity in longer trials. Results of the 10% data removal revealed at that range the Garmin Fenix 5 had 56% of the data removed, for the Jabra Elite sport 38% was removed, For the Movti Ring 52% was removed, and for the Scosche Rhythm+ 12% of the data was removed. Wearable devices worn on the wrist (Garmin Fenix 5), finger (Motiv Ring), and ear (Jabra Elite Sport) have poor heart rate performance in outdoor settings. While the forearm device (Scosche Rhythm+) had the best heart rate performance, we still express caution as there is still error associated with the device.


Exercise; Heart rate; Outdoor; Wearables


Experimental Analysis of Behavior | Kinesiology

File Format


File Size

916 KB

Degree Grantor

University of Nevada, Las Vegas




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