Observational study in the British Journal of Sports Medicine finds 560-610 min/week of moderate-to-vigorous activity needed for >30% cardiovascular risk reduction.
Key Takeaways
Current 150 min/week guideline yields only 8-9% cardiovascular risk reduction; 560-610 min/week is 3-4x higher and achieves substantial (>30%) protection.
Study used wrist-worn accelerometers and VO2 max cycle tests on 17,088 UK Biobank participants, tracking 1,233 cardiovascular events over 7.8 years.
Lower-fitness individuals need 30-50 extra minutes per week versus high-fitness individuals to reach equivalent risk reduction thresholds.
Only 12% of study participants actually hit the 560-610 min/week level, highlighting how far current behavior is from optimal targets.
Researchers call for stratified, personalized guidelines rather than a single universal minimum, noting observational design limits causal conclusions.
Hacker News Comment Review
Commenters note this is a significant upward revision from prior ~150-minute guidelines, with the dose scaling by baseline fitness level.
Practical feasibility is the dominant skepticism: fitting 80-87 min/day of moderate-to-vigorous activity into a dual-income household with young children and no support is seen as unrealistic for most people.
