# Making a Digital Pledge Added 665 Steps a Day

_Evidence Level: Moderate · Chen RJ et al., European journal of preventive cardiology, DOI 10.1093/eurjpc/zwag534_

*Effectiveness of Digital Commitment Devices in Improving Lifestyle and Cardiometabolic Outcomes in Adults with Cardiometabolic Risk Factors: A Systematic Review and Meta-Analysis.*

- **Evidence Level**: Moderate
- **Why this grade**: Pooled data from 29 trials with random assignment and 7,534 people; weight results varied widely between trials, and data beyond 12 months are missing.
- **Facts**: Design: Meta-analysis
- **Publication Types**: Journal Article
- **Journal**: European journal of preventive cardiology
- **Sample Size**: 7,534 adults in 29 studies
- **Authors**: Chen RJ, Goh CSP, Chew NW, Chew HSJ
- **Graded and published**: 2026-10-26
- **Last edited**: 2026-10-28
- **Topics**: Walking, Metabolic Health, Heart Health
- **DOI**: https://doi.org/10.1093/eurjpc/zwag534
- **Original Source**: https://pubmed.ncbi.nlm.nih.gov/42928598/

## Summary

Most people know what they want to change. Doing it is harder, especially with exercise and weight. Digital tools that let people lock in a commitment to a goal ahead of time can help close that gap a little. People who used them walked about 665 more steps a day on average. They also lost close to two kilos more than the comparison groups.

Researchers pooled 29 studies with 7,534 adults in total. All of them had a higher risk of heart and metabolic disease. In every study, chance decided who got the digital tool. Afterwards, participants reported less eating driven by emotions and fewer episodes of losing control over food. Body fat percentage, diet quality and taking medication as prescribed also improved.

For steps, the studies agreed closely. For weight, their results varied a lot. The analysis cannot say whether the gains last for years. The authors call for trials that follow people for longer than 12 months.

## Practical Takeaway

Digital commitment tools gave adults at higher heart risk about 665 extra steps a day on average.

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_Canonical: https://longevity-cities.com/en/research/making-a-digital-pledge-added-665-steps-a-day · Part of Longevity Cities · Updated 2026-10-28_