Brain Activity & Muscle Force in Morning and Evening Types

A new study measured changes in brain activity and muscle force from morning to night in morning and evening types.The study involved 18 people. Nine were “evening types” who prefer to stay up late at night and sleep late in the morning; nine were “morning types” who prefer to go to bed early and wake up early. Data were collected four times in one day: at 9 a.m., 1 p.m., 5 p.m. and 9 p.m.Results