There are 3 stages of sleep:
- Light sleep.
- Sleep where heart rate and breathing become regular and your temperature lowers.
- Deep sleep, where breathing slows and muscles relax.
Airway resistance increases a night, whether awake or asleep. This increase is greater though during sleep. So airway function decreases as you progress through the 3 stages of sleep.
This is true for everyone but the effect is greater with asthma.
