Why sitting may be bad for your heart

People who sit for more than about nine or 10 hours each are prone to developing diabetes

Sitting quietly for extended periods of time could be hurting your heart, according to a surprising new study. It finds that the more people sit, the greater the likelihood that they will show signs of injury to their heart muscles.

People who sit for more than about nine or 10 hours each day — a group that includes many of us who work in offices — are prone to developing diabetes, heart disease and other problems, and most of these risks remain relatively high, even if we exercise.

Excessive sitting also has been associated with heart failure. But how sitting, which seems