In India, the school education system puts a higher emphasis on grades than on practical learning, thus encouraging practices like late-night studies and changes in eating and sleeping routines during weekdays and weekends. So how badly are India’s adolescents affected by this? In a recent study, researchers at the Chaudhary Charan Singh University, India, analysed the complex relationship between these lifestyle changes and the disruptions in the circadian cycles among students from classes IX, XII and the first year of college.