FREE-LIVING COMPARABILITY OF THE FIBION AND ACTIVPAL MONITORS, AND RELIABILITY OF FIBION THIGH-AND POCKET-WORN MONITORS
Start Date
April 2025
Location
CLC 207
Abstract
BACKGROUND: Accelerometer-based inclinometer devices measure sedentary and active behaviors such as sitting, standing, and walking. Validity of these devices is necessary to use in further research.
PURPOSE: This study examined the validity and reliability of Fibion activity monitors worn on the thigh or in pockets, compared to the ActivPal (AP) monitor, during free-living conditions.
METHODS: Twenty-five adults (18-64 years) simultaneously wore Fibion monitors on each thigh and in each pocket, and one AP device randomized to either thigh, for three full days. Pocket devices were removed during sleep or showering. Device agreement and differences in sitting, standing, stepping, and cycling behaviors were analyzed.
RESULTS: Over 63,775 total minutes, thigh-worn devices showed 85.6% agreement (Kappa = 0.728), whereas pocket-worn devices had 76.1% agreement (Kappa = 0.57); both significant at p≤0.001. Sitting times differed significantly (p<0.05) between pocket-worn (left: 506 min; right: 501 min) and thigh-worn devices (Fibion left: 550 min; Fibion right: 547 min; AP: 555 min). Standing times significantly differed (p<0.05) between thigh-worn Fibion devices (left: 183 min; right: 180 min) and other devices (216-223 min). Stepping differed significantly among all devices except between pockets; Fibion thigh devices recorded significantly greater stepping than AP or pockets. Cycling showed no significant differences, though the left pocket device recorded notably higher values (7.88 min vs. 0.78-1.65 min). Moderate activity, stepping, and cycling significantly differed between left and right thigh devices but not between pocket devices.
CONCLUSION: Fibion monitors demonstrate reliable measurements by location, with minimal left-right differences except during stepping activities.
Poster from BigEast Research Symposium
FREE-LIVING COMPARABILITY OF THE FIBION AND ACTIVPAL MONITORS, AND RELIABILITY OF FIBION THIGH-AND POCKET-WORN MONITORS
CLC 207
BACKGROUND: Accelerometer-based inclinometer devices measure sedentary and active behaviors such as sitting, standing, and walking. Validity of these devices is necessary to use in further research.
PURPOSE: This study examined the validity and reliability of Fibion activity monitors worn on the thigh or in pockets, compared to the ActivPal (AP) monitor, during free-living conditions.
METHODS: Twenty-five adults (18-64 years) simultaneously wore Fibion monitors on each thigh and in each pocket, and one AP device randomized to either thigh, for three full days. Pocket devices were removed during sleep or showering. Device agreement and differences in sitting, standing, stepping, and cycling behaviors were analyzed.
RESULTS: Over 63,775 total minutes, thigh-worn devices showed 85.6% agreement (Kappa = 0.728), whereas pocket-worn devices had 76.1% agreement (Kappa = 0.57); both significant at p≤0.001. Sitting times differed significantly (p<0.05) between pocket-worn (left: 506 min; right: 501 min) and thigh-worn devices (Fibion left: 550 min; Fibion right: 547 min; AP: 555 min). Standing times significantly differed (p<0.05) between thigh-worn Fibion devices (left: 183 min; right: 180 min) and other devices (216-223 min). Stepping differed significantly among all devices except between pockets; Fibion thigh devices recorded significantly greater stepping than AP or pockets. Cycling showed no significant differences, though the left pocket device recorded notably higher values (7.88 min vs. 0.78-1.65 min). Moderate activity, stepping, and cycling significantly differed between left and right thigh devices but not between pocket devices.
CONCLUSION: Fibion monitors demonstrate reliable measurements by location, with minimal left-right differences except during stepping activities.
