The Impact of the Double School Shift System on Lifestyle Behaviors Among Mexican Adolescents

Adolescents attending the morning school shift had a 1.77-hour shorter sleep duration on weekdays compared to those in the afternoon shift.

• Morning shift students experienced higher social jetlag, averaging 1.07 hours more compared to afternoon shift students.
• On weekends, morning shift students had a 0.40-hour longer sleep duration than their afternoon counterparts.
• Morning shift adolescents exhibited 0.85 hours more sedentary time than those attending the afternoon shift.
• Students in the morning shift had a higher consumption of a meat and starchy food dietary pattern.
• Among boys, morning shift attendance was linked to a lower likelihood of smoking and a higher likelihood of breakfast consumption.

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