Key result
My Heart Counts app linked to ~18 m increase in 6MWT distance on repeat testing.
Why the study?
Using the largest collection of remote 6MWTs, the study sought to identify demographic and clinical associations with baseline 6MWT distance and determine if using the My Heart Counts smartphone application altered 6MWT distance.
What demographic and clinical variables are associated with remote 6-minute walk test distance, and does use of a smartphone application improve it?
Population
8922 unique participants performing 30,475 6MWTs via a smartphone application
Comparison
Demographic, clinical, and disease variables; and repeat 6MWTs after app use
Design
Digital cohort study
Follow-up
At least 1 week but no greater than 3 months
Authors
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Remote 6MWT collection is feasible at scale; hypothesis-generating for app effects on distance, pending RCTs.
Observational (n=8,922)
What demographic and clinical variables are associated with remote 6-minute walk test distance, and does use of a smartphone application improve it?
Mean Difference: 17.5
p-value: p=<0.001
A fully digital smartphone platform successfully collected the largest dataset of remote 6-minute walk tests, validating known clinical associations and demonstrating a small improvement in functional capacity with app use.
Kim et al. (2025) conducted an observational in Cardiovascular health (n=8,922). My Heart Counts smartphone application was evaluated on Change in 6-minute walk test distance (MD 17.5, p=<0.001). Use of the My Heart Counts smartphone application was associated with a significant increase in 6-minute walk test distance (+17.5 m, P<0.001) among participants conducting repeat tests.
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