The symptoms for understanding whether your body clock is out of kilter are relatively straightforward:
You find it difficult to go to sleep.
You have restless nights, frequently waking throughout the night.
You wake up early and can’t fall back to sleep.
If you have ever been jet-lagged before, then this is exactly what an out of sync body clock feels like. Jet lag is simply a mismatch of the time of day and your body clock and is one of the primary causes of an out of time sleep-wake rhythm.