Chronotype Test

The concept of chronotype refers to the biological profile that governs your natural preferences for sleep, waking, and activity over a 24-hour cycle. If some people feel at their best at dawn while others do not truly come alive until late evening, it is not a matter of willpower: it is the result of the circadian clock, the internal biological mechanism tied to the day-night rhythm and regulated by specific genes. Research by chronobiologist Jürgen Aschoff in the 1960s, followed by the large-scale work of Till Roenneberg (LMU Munich) across millions of subjects, established that this circadian rhythm varies considerably from person to person.

It was Dr. Michael Breus, a psychologist specializing in sleep disorders, who popularized in 2016 in his book "The Power of When" a classification into four chronotypes: the Lion, an early riser and ambitious planner who goes to bed early and makes best decisions in the morning; the Bear, the most common chronotype among humans, aligned with the sun and peaking between 10 a.m. and 2 p.m.; the Wolf, a night owl and creative thinker whose mind truly wakes up in the evening; and the Dolphin, a light, often insomniac sleeper with fragmented sleep and unpredictable energy.

Knowing your chronotype is not a trivial curiosity: it is a practical key to optimizing your productivity, health, and wellbeing. Scheduling your most demanding cognitive tasks at your circadian peak, adjusting your exercise or eating schedule, and stopping the fight against your natural rhythm can radically transform your daily experience. This free test reveals your chronotype in 20 questions.