Aerobic Exercise as a Countermeasure for Night Shift Associated Circadian Misalignment

Inclusion Criteria: * Age 18-40 years * Body Mass Index 18.5-\<40kg/m\^2 * Physically inactive: defined as \<150 minutes per week of voluntary exercise at moderate intensity or greater and \<60 min per day of total habitual physical activity (i.e., work related, transportation related) at moderate intensity or greater, over the past 3 months. * No plans to relocate within the next 6 months. * No plans for extended travel (\>2 weeks) within the next 3 months. * Capable and willing to give informed consent, understand exclusion criteria, and adhere to study conditions. * Have a primary care physician (or are willing to establish care with a primary care physician prior to study enrollment) to address medical issues which may arise during screening or study procedures. * No contraindications to exercise or limitations on ability to be physically active. * Ability to adhere to sleeping, eating, and exercise protocol * Willing and able to wear activity/sleep monitor for 7 consecutive days. * For Females: * Not currently pregnant or lactating. * Not pregnant within the past 6 months. * Not planning to become pregnant in the next 6 months * Regularly timed menstrual cycles to facilitate measurement of EE in the early follicular phase. Exclusion Criteria: * Diastolic blood pressure \>100 mmHG, systolic blood pressure \>160 mmHG, or resting heart rate \>100 bpm as measured in duplicate on the screening visit after 5 minutes of rest in a seated position. * Diabetes (fasting glucose …