According to Cajochen (https://www.researchgate.net/publication/5781075_A_time_to_think_circadian_rhythms_in_human_cognition?ev=home_person_add_file_publication_target) and others it depends on time of day as well as the chronotype. It would be very interesting to see some stats of biathlon contest results, their time of day and the chronotype of the athletes!

Article A time to think: Circadian rhythms in human cognition

Thanks for your answer, Sven. In my diploma I verified question of chronotype with leg dynamic strenght of adolescents (boys and girls). I used Roennenberg (2003) questionnaire. Now, the part of my project is to investigate shooting accuracy infuence of day time.

Michal, that is interesting stuff! The MCTQ will certainly help to evaluate the chronotype, first of all. Further, especially for international contests, it is probably important to look at the possible impact of jetlag for athletes that crossed multiple time zones to the contests. Some US baseball teams look at possibilities to reduce the jetlag for their players under such circumstances.

Further, you might have a look at Kantermann: https://www.researchgate.net/publication/229162269_The_stimulating_effect_of_bright_light_on_physical_performance_depends_on_internal_time; or http://www.ncbi.nlm.nih.gov/pubmed/12388468.

Good luck,

SVen

Article The Stimulating Effect of Bright Light on Physical Performan...

Guess you may have a much larger impact from "dehydration" level of the athlete..then from morning or evening sessions ..

Yes, the question of dehydration has certainly stronger impact to sport performance than chronotype difference. Only think I want to know is if there is any difference between performance of morning and evening types in shooting effeciency. Thak you for your note.