Circadian Rhythms Did you know… Back in 400 BC, Androsthenes, scribe of Alexander the Great, described the movement of tamarind leaves — how they close at night and open during the day. Sound familiar? This is the first account of what’s now called circadian rhythms. Apply this ancient lesson by going to bed and waking up the same time each day. Sleep Shifts Did you know… In the 1600s, waking up in the middle of the night was the norm. People slept in 2 segments — and in between woke up to read, pray, and socialize. We’ve since found that a straight shot of sleep is better for daily rest and recovery. Get some great sleep tips by clicking right here . or... Click here to read Alexander the Great's final words .