1. Exercise Previous studies have shown that exercise can increase deep sleep time.

2. People who control their weight and obesity are more prone to sleep disorders. For example, severe snoring can lead to sleep apnea and reduce deep sleep time.

3. It is not recommended to use sleeping pills for rational drug use. Most sleeping pills can't increase the time of deep sleep, but some studies have shown that olanzapine can increase the time of deep sleep. If you need to take medicine, you must do it under the guidance of a doctor.