Could be an idea to respect your natural cycles.
Original post available here
Men are solar, women are lunar.
Men have a 24 hour testosterone testosterone cycle which peaks in the morning and declines through the day.
Women have a 28 day hormonal cycle that changes with the 28 day cycle of the moon.
Men are meant to work hard in the morning and around lunch time and relax later in the day.
Women are meant to sync their activities to where they are within their 28 day cycle and vary their activities widely day to day.
The 9-5 work life is built for this solar cycle.