Self-expansion is positively associated with Fitbit-measured daily steps across 4-weeks.

Xu, Xiaomeng; Tupy, Samantha; Sharp, Julia L; Miller, Ashley L; Correll, Danielle; Nigg, Claudio R (2022). Self-expansion is positively associated with Fitbit-measured daily steps across 4-weeks. Scientific Reports, 12(1), p. 20547. Nature Publishing Group 10.1038/s41598-022-24576-w

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The growth of the self-concept through increasing perspectives, identities, resources, and efficacy is known as self-expansion and typically involves novelty, challenge, interest, and/or excitement. Self-expansion is positively associated with health factors including self-reported physical activity (PA). This study is the first to investigate self-expansion and daily PA, and with a PA monitor. Fifty community participants completed baseline questionnaires, wore a Fitbit One and completed daily self-report questionnaires for 28 days, and completed follow-up questionnaires. Daily surveys included questions about both general and PA-specific self-expansion. Across the 4 weeks, steps taken was positively correlated with both general (all maximum likelihood r = 0.17) and PA-specific self-expansion (maximum likelihood rs of 0.15 and 0.16), and PA-specific self-expansion was positively correlated (maximum likelihood rs of 0.38 and 0.50) with aerobic activity. Future research should investigate this relationship in a larger more diverse sample and test whether PA-specific self-expansion can be utilized as an acceptable, feasible, and effective intervention to increase daily steps and other forms of PA.

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