Research

Energy balance

Wearable activity trackers lead to improvements in body composition, specifically bodyweight and waist circumference, with large effect sizes for bodyweight reduction.

Using a wearable activity tracker can help you lose weight, with an average reduction of 0.5 to 1.5 kg. This benefit is seen in both healthy adults and those with chronic conditions like diabetes or heart disease. The weight loss is a result of the increased physical activity driven by the tracker.

ModerateSupportsMEDIUM confidence
Taken together, the meta-analyses suggested activity trackers improved... body composition (SMD 0·7–2·0)... equating to... reductions of approximately 1 kg in bodyweight.
Ty Ferguson et al. · The Lancet Digital Health · 2022

Why this rating

Based on umbrella review, but physiological outcomes were often small or non-significant, with bodyweight being the strongest physiological outcome.

Source

Effectiveness of wearable activity trackers to increase physical activity and improve health: a systematic review of systematic reviews and meta-analyses

Ty Ferguson et al. · The Lancet Digital Health · 2022

DOI 10.1016/s2589-7500(22)00111-x

Meta-analysis · 39 studiesCited 494×
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DOI resolved against Crossref · corpus check 2026-06-10

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