Fitbit wear during an activity trial

Survivors wore Fitbits most days and roughly doubled ActiGraph MVPA over 12 weeks in the intervention arm.

Source

Patterns of Fitbit Use and Activity Levels Throughout a Physical Activity Intervention: Exploratory Analysis from a Randomized Controlled Trial

Hartman SJ, Nelson SH, Weiner LS · JMIR mHealth and uHealth · 2018

Study at a glance

Design: Other — Secondary analysis of the exercise arm of a 12-week physical-activity RCT
N: N=42 · 42 of 43 exercise-arm completers (parent RCT randomized 87)
Population: Female breast cancer survivors in a physical-activity intervention
Outcome: Fitbit wear adherence and ActiGraph MVPA over 12 weeks

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Fitbit wear during an activity trial

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42 female survivors.

Participants were 42 female breast cancer survivors who were predominantly diagnosed at stage 1 (62%, 26/42). About

Wore Fitbit 6.2 of 7 days.

Each week, participants wore the Fitbit on average 6.2 out of 7 days (88.5% per week, SD 1.8). Altho

What they did

Exploratory analysis of Fitbit use among women in a 12-week activity intervention, relating wear adherence to ActiGraph MVPA.

Among 42 survivors, mean wear was 6.2/7 days weekly. Intervention MVPA rose from 93.8 to 195.3 min/week.

The limits

Small exploratory subsample; describes use patterns rather than proving Fitbit alone causes gains.

Key terms

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Common questions

42.

Wear?

6.2/7 days.

MVPA change?

93.8→195.3 min/week.

Valid days?

Mean 88%.