This article suggests that working 11 hrs a day increases heart disease compared to 7 or 8 hrs a day.
The study didn’t measure how much the “workaholics” exercised or whether or not they were obese. I suspect that long work days can interfere with healthy habits. I also wonder if there are distinctions between manual labor and others. We know that sitting is bad for heart health.
Who works that much and still manages to eat well and exercise?