Doctors have raised concerns about the 72-hour workweek and the 9-9-6 work culture advocated by Infosys founder Narayana Murthy. "Sleep, diet, and exercise are...core pillars of good health. Long workweeks disrupt all three," a doctor said. Long workweeks can reduce your sleep duration and quality, increase reliance on junk food and packaged meals, and leave little room for physical activity.