Editor's Note: Today, motion trackers are everywhere, but one problem has been plaguing everyone: Are the numbers of steps and heat they track accurate? Recently, a study sponsored by the American Sports Commission (ACE) evaluated five popular motion trackers in the market to determine their true value. The OFweek Medical Technology Network compiles the research report for you to help you gain insight into the actual effects that the current motion tracker can achieve.
In modern society, people generally agree with a healthier lifestyle. More and more people are tempted to use sports trackers to track their calorie consumption and sleep quality to help them adhere to fitness programs and achieve fitness and health goals.
It is estimated that a total of 19 million activity tracking devices will be put into use in 2014, and this number is expected to grow exponentially in the next few years. According to a recent Juniper Research report, the use of motion trackers, or fitness wearable devices, will triple by 2018 by 2014.
These new technologies are very cool and some are very interesting to use, but so far few published studies have confirmed the accuracy and effectiveness of these devices. How accurate is the motion tracker's prediction of heat consumption or the number of steps? Considering the growing popularity of these devices, the American Sports Commission (ACE) recruited a team of researchers from the Department of Clinical Exercise Physiology at the University of Wisconsin-La Crosse to evaluate five popular sports trackers in the market.
Five popular sports trackers in the market were selected for this study: Nike+ Fuelband ($99-$149), Fitbit Ultra ($99), Jawbone UP ($99), BodyMedia FitCore ($99) and Adidas MiCoach ($199). (BodyMedia has been acquired by Jawbone.)
The researchers recruited 10 healthy men and 10 healthy women between the ages of 18 and 44 to participate in the study. They are divided into two groups, one of which measures energy expenditure and the other measures the number of steps taken. Both studies were conducted simultaneously and the same protocol was applied.
In addition to wearing a motion tracker, the subject also wore a portable metabolic gas analyzer and the NL-2000I pedometer. The reliability of these two sets of equipment has been proven to enable accurate calorie consumption measurements and step counting. With all of the above devices in place, each subject performed a series of different exercises at the same time; the test was performed in two separate phases, 50 minutes each.
The first phase of the exercise included walking and running on a horizontal treadmill. Each subject walked for 20 minutes at the optional speed, then rested for 10 minutes, and then ran for 20 minutes at the optional speed.
The second phase of the exercise is done on an elliptical machine that can exercise both arms and legs. Subjects should first choose the intensity of the elliptical machine for 20 minutes. After the break, they will be involved in agility training related to sports, including agility ladder, basketball free throw, suspension training and half-time layup.
After completing the two-stage exercise, the energy consumption values ​​recorded by each device and the step values ​​taken will be compared to the records of the portable metabolic analyzer.
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