A segmented sleep or biphasic sleeping pattern involves sleeping in two separate segments. The term “polyphasic” applies to multiple segments, much like the sleeping patterns of infants.

And watch out for warning signs that this alternate sleep schedule is putting you in a funk. How It All Got Started Segmented sleep sounds trendy, but it's not a new idea.

Key points Segmented sleep reflects an “ancient” human pattern of alternating sleep and middle-of-the-night activity. Segmented sleep, coupled with the right mental frame of mind, may cure ...