alert in the morning as “larks” and those who are most alert in the evening as “owls.” Numerous studies confirm that these categories are indeed very real. Whether they be physically or cognitively demanding tasks, most people tend to perform their best either in the earlier part of the day (i.e., larks) or in the later part of the day (i.e., owls). These individual differences are rooted in our bodies’ unique biological rhythms—when various hormones associated with energy and focus are released, and when our body temperatures rise and fall. While some of us get pulses of energizing hormones
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