15 minutes is a short walk, bit this isn't the title (or the finding).
Title: This easy daily habit cuts heart risk by two thirds
Paper title: Step Accumulation Patterns and Risk for Cardiovascular Events and Mortality Among Suboptimally Active Adults
Finding:
> Suboptimally active adults who accumulated most of their daily steps in longer bouts had lower mortality and CVD risk than those who accumulated most daily steps in shorter bouts.
Title: This easy daily habit cuts heart risk by two thirds
Paper title: Step Accumulation Patterns and Risk for Cardiovascular Events and Mortality Among Suboptimally Active Adults
Finding:
> Suboptimally active adults who accumulated most of their daily steps in longer bouts had lower mortality and CVD risk than those who accumulated most daily steps in shorter bouts.