A lot has been made of insomnia as a contributing factor to high blood sugar levels, but German researchers tell us that the two kinds of insomnia that run up blood sugars the most are restless legs syndrome and the breathing disturbance known as sleep apnea.
The point at which sleep deprivation begins to interfere with blood sugar control is getting less than 5-1/2 hours of sleep uninterrupted every night. Even non-diabetics, the researchers have found, often get high blood sugars when they get less than four hours of sleep at night. Of course, if you have either restless legs syndrome or sleep apnea, you are unlikely to get even one hour of uninterrupted sleep at night.
This means that taking care of insomnia might also help you keep your blood glucose in check. And stopping the development of neuropathy, by careful attention to blood sugar levels, will also help improve restless legs syndrome.
Keckeis M, Lattova Z, Maurovich-Horvat E, Beitinger PA, Birkmann S, Lauer CJ, Wetter TC, Wilde-Frenz J, Pollmächer T. Impaired glucose tolerance in sleep disorders. PLoS One. 2010 Mar 1;5(3):e9444.