
More Exercise Could Strengthen Heart Health Beyond Guidelines, but Realistic Goals Matter
A UK Biobank analysis of 17,088 people over ~8 years finds that while the standard 150 minutes per week of moderate-to-vigorous activity lowers cardiovascular risk, higher levels of exercise yield greater protection: about 340–370 minutes per week (~20% risk reduction) and roughly 9–10 hours per week (>30% reduction), with the largest benefits seen in those with lower fitness. Experts caution against overstating ultra-high targets and emphasize that the 150-minute minimum remains a valid baseline; more activity can help when feasible, but randomized trials are needed to confirm causality.

