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Dr. Andy Galpin explains sleep restriction training as a tough but effective way to fix broken sleep. The method locks in a strict wake-up time of 5 a.m. every day and delays bedtime until 11:59 p.m., limiting sleep to five hours. The first nights are exhausting and uncomfortable, but consistency is key. By removing naps and extra rest, the body quickly learns that sleep time is limited and becomes more efficient. Falling asleep happens faster, deep sleep comes sooner, and the overall sleep cycle tightens. After about a week, bedtime is slowly moved earlier in small increments, allowing sleep duration to increase while keeping quality high. Over time, this discipline retrains the body to sleep deeply and consistently.