https://www.selleckchem.com/pr....oducts/ly2157299.htm
51) and light (r=.4 activity and weak for moderate/fairly active (r=.2 and vigorous/very active (r=.25). There were strong correlations between the physical activity data measured by Fitbit Zips and iPhones, but the iPhone Health app significantly underestimated the number of steps per day taken and the distance travelled when compared to the Fitbit Zip. SO WHAT? Understanding the comparability of accelerometer devices provides useful information for future pragmatic physical activity measurement. There were strong correlations be