“We have body clocks not just in the brain but all over – in our pancreas, liver, heart, kidneys, fatty tissue, muscle, virtually everywhere – and these operate to their own timetables, dictating when hormones are released or organs are busiest or most relaxed. Your reflexes, for instance, are at their sharpest in mid-afternoon, while blood pressure peaks toward evening. Men tend to pump more testosterone early in the morning than later in the day.”
