Conclusion These studies provide preliminary evidence suggesting that EAMS can increase physical activity and decrease weight significantly , but their efficacy compared to other interventions has not yet been demonstrated .
Background Obesity is a growing global health concern that may lead to cardiovascular disease , type II diabetes , and cancer .
Several systematic review s have shown that technology is successful in combating obesity through increased physical activity , but there is no known review on interventions that use an electronic activity monitor system ( EAMS ) .
EAMSs are defined as a wearable device that objective ly measures lifestyle physical activity and can provide feedback , beyond the display of basic activity count information , via the monitor display or through a partnering application to elicit continual self-monitoring of activity behavior .
These devices improve upon st and ard pedometers because they have the ability to provide visual feedback on activity progression , verbal encouragement , and social comparison .
This systematic review aim ed to synthesize the efficacy and feasibility results of EAMSs within published physical activity interventions .
Validation of the Fitbit One activity monitor device during treadmill walking.
OBJECTIVES In order to quantify the effects of physical activity such as walking on chronic disease , accurate measurement of physical activity is needed . The objective of this study was to determine the validity and reliability of a new activity monitor , the Fitbit One , in a population of healthy adults . DESIGN Cross-sectional study . METHODS Thirty healthy adults ambulated at 5 different speeds ( 0.90 , 1.12 , 1.33 , 1.54 , 1.78 m/s ) on a treadmill  while  wearing three Fitbit One activity monitors  ( two on the hips and one in the pocket ) . The order of each speed condition was r and omized . Fitbit One step count output was compared to observer counts and distance output was compared to the calibrated treadmill output . Two-way repeated measures ANOVA , concordance correlation coefficients , and Bl and and Altman plots were used to assess validity and intra-class correlation coefficients ( ICC ) were used to assess reliability . RESULTS No significant differences were noted between Fitbit One step count outputs and observer counts , and concordance was substantial ( 0.97 - 1.00 ) . Inter-device reliability of the step count was high for all walking speeds ( ICC ≥ 0.95 ) . Percent relative error was less than 1.3 % . The distance output of the Fitbit One activity monitors  was significantly different from the criterion values for each monitor at all speeds ( P<0.001 ) and exhibited poor concordance ( 0.0 - 0.05 ) . Inter-device reliability was excellent for all treadmill speeds ( ICC ≥ 0.90 ) . Percent relative error was high ( up to 39.6 % ) . CONCLUSIONS The Fitbit One activity monitors are valid and reliable devices for measuring step counts in healthy young adults . The distance output of the monitors is inaccurate and should be noted with caution
Conclusion These studies provide preliminary evidence suggesting that EAMS can increase physical activity and decrease weight significantly , but their efficacy compared to other interventions has not yet been demonstrated .
Background Obesity is a growing global health concern that may lead to cardiovascular disease , type II diabetes , and cancer .
Several systematic review s have shown that technology is successful in combating obesity through increased physical activity , but there is no known review on interventions that use an electronic activity monitor system ( EAMS ) .
EAMSs are defined as a wearable device that objective ly measures lifestyle physical activity and can provide feedback , beyond the display of basic activity count information , via the monitor display or through a partnering application to elicit continual self-monitoring of activity behavior .
These devices improve upon st and ard pedometers because they have the ability to provide visual feedback on activity progression , verbal encouragement , and social comparison .
This systematic review aim ed to synthesize the efficacy and feasibility results of EAMSs within published physical activity interventions .