File:Learning circadian cycle.jpg

Learning circadian cycle. The exemplary picture proves that morning is the best time to learn with a "second (circadian) wind" in the evening (blue line). The morning learning time is short and sharp with longer individual learning blocks, while the evening time spans over a longer period but shows gradually decreasing drop in the "power to learn" (2h average in the morning, 1h average in the 12th hour, down to 5-10 min. at the end of the day)(red line). The rapid increase in the length of blocks after 21sth hour (red line) represents the days of "early rising with extra learning power". Even though those early learning blocks are long, they do not occur often (as indicated by low blue line, which represent "frequency of learning" at that particular time).