Many people with low back problems wake worse in the morning.

If you have commenced your McKenzie exercises and are improving as expected, and yet seem to take a step or two backwards on waking and notice you are not as good as when you retired to bed, correction of your sleeping posture may be required.

Often the issue is loss of the lordosis from curling up in your sleep, or lying on your back (where the back rounds like it would lying in a hammock), allows the disc to bulge more overnight. Use of a rolled towel or McKenzie Night roll (as in the youtube clip) will resolve the problem, and is often only required for a few days.

If after this your morning pain/stiffness is no better, it is likely that either the surface you are sleeping on, or inflammation (which accumulates with lack of movement over night) is likely the cause, and will need to be identified and addressed by your McKenzie Practitioner.