One massive fifteen-year-long study of more than ten thousand Danes found no association between time spent sitting at work and heart disease.60 An even bigger study on sixty-six thousand middle-aged Japanese office workers yielded similar results.61 Instead, leisure-time sitting best predicts mortality, suggesting that socioeconomic status and exercise habits in mornings, evenings, and weekends have important health effects beyond how much one sits during weekdays at the office.62
