Russian scientists from RUDN University have proved that people have six chronotypes instead of the usual binary system "owl-lark". It turned out that circadian rhythms are much more complex than we expected, and this imposes certain restrictions on a person's activity during the day. The updated information will surely come in handy for students and teachers when planning their schedule.
The presence of several chronotypes, or as they are called "biological clocks", scientists guessed before. But confirmation was required, which was prepared at RUDN University in the form of a survey of 2300 students and teachers. They were asked to rate their sleepiness and performance at different hours of the day, and in most of the questionnaires, the time was specified as arbitrary to avoid stereotyped answers. Based on the results of the survey, the organizers saw a clear distribution of answers across six chronotypes.
The main proof of the correctness of the hypothesis is that less than 37% of the respondents were able to make a choice between the classic "lark" (13%) and "owl" (23%), two-thirds of the participants indicated that they consider themselves to be something else. In particular, the largest group, 24%, was in favor of the evening type of activity, but not the nighttime one, like among the owls. Such people find it difficult to solve problems in the morning, but they gradually come into rhythm and work best in the afternoon.
The four new chronotypes look like this. First, there are as many as 18% of people "constantly sleepy" during the day, without obvious periods of burst of energy. Secondly, there are 16% of "moderately active", whose activity is rather low at any time of the day. Thirdly, their complete opposite, 15% of "daytime active" people, whom the light of the sun gives strength. Finally, there are only 9% of people who are “very active during the day”. It remains to add that 5% of the respondents were outside any categories, so work on the study of chronotypes will continue.