In the Knowledge Café of the Forum Groningen on April 24 between 8 and 9:30 pm, Maaike van Veen, psychiatrist, Catrien Santing, historian, and Marijke Gordijn, chronobiologist from Chrono@Work, will discuss the topic of sleep, mood, history, and more. The discussion is led by Ruth Koops van ‘t Jagt. This Knowledge Café was created in…
Marijke Gordijn is invited for several public events (in Dutch) on the topic of Daylight saving time. The first one will be an interview organised by Studium Generale Utrecht in collaboration with Tivoli/Vredenburg. On October 28th, at 8:15 pm on the stage of Tivoli-Vredenburg in Utrecht, Marijke will talk about the role of the biological…
Normally we promote to sleep at night and be awake during the day. However, Marijke Gordijn from Chrono@Work accepted the invitation to be one of the two guests in the night program De Slapelozen on Dutch radio on early Thursday morning August 12th 2021, between 2 and 4 am. The reason why is that during…
The COVID-19 pandemic poses a serious health threat to the world population. In response, governments are implementing a variety of new policies including self-quarantine, self-isolation and social distancing. While medically necessary to limit spread, these new social policies can disrupt many of the stabilizing factors in our lives which support mental health. In close collaboration,…
On May 17th, Pauline Bollen and Marijke Gordijn from Chrono@Work organized an interactive workshop for a group of 15 social workers of academic institutes in the Netherlands. The assignment was clear: inform us on possible sleep problems we may encounter in our office and how to proceed if we recognize some. The 3h-workshop consisted of…
Chrono@Work B.V. Groningen is the first company this year to receive a grant of € 25,000 of SNN. The innovation grant for the Groningen company is intended for research into the feasibility of a sensor system that teaches poor sleepers to sleep according to their biological clock. Read more on the site of SNN. With…
In the Dutch Television program ‘Dokters van Morgen‘ on October 17th, Antoinette Herzenberg pays attention to the importance of a healthy sleep. As part of the program, five volunteers went camping during one weekend. Chrono@Work supported the program with scientific input and the analysis of light exposure, rest-activity rhythms and melatonin patterns. Following up on…
The Dutch media are highly interested in the new teaching package Charge Your Brainzzz. Please read the item “50% of the adolescents do not sleep enough…but in this way you will get them in bed” (in Dutch) that RTL published online on September 27th.
After a year of hard work we are there! The teaching materials for the package Charge Your Brainzzz are ready. Charge your Brains teaches highschool students about sleep. On 27 September, Chrono@Work and the Dutch Brain Foundation will launch this special educational package. Charge Your Brainzzz is a modern package with activating learning tools including…
Van der Heijden, K.B., Vermeulen M.C.M., Donjacour, C., Gordijn M., Hamburger, H., Meijer, A.M., Van Rijn, K. Chronic sleep reduction predicts academic achievement and study concentration in higher education students. J. Sleep Res. 2017
http://onlinelibrary.wiley.com/doi/10.1111/jsr.12596/abstract
Wednesday September 27th, Chrono@Work and the Brain Foundation will launch the new teaching material Charge Your Brainzzz in the Corpus Congress Centre in Leiden. Charge Your Brainzzz consists of a package of three lessons about sleep regulation and sleep disorders, with activating learning tools, animations (to be used during class) and a serious game developed…
Gordijn M.C.M. Slapen als onderdeel van een gezonde leefstijl. In: “Gestoorde slaap: een onschuldig probleem?” Lancel M., Koenraadt F. en ‘t Lam K. (eds). Wolf Legal Publishers. pp 13-28. (2016).
LIght therapy to shift the biological clock has been shown to be effective, but in most cases studies are carried out in well controlled laboratory studies and with long duration light pulses. In practice, light therapy should consist of an easy to apply lighting regime to which people at home will adhere and with clear…
On July 19th at 17: 15h Marijke Gordijn CEO of Chrono@Work was interviewed by Morad & Shay for the local youth radio station Funx. Following up on a British study from 2015 that discussed the optimal bed-times, times of getting up and working times for young and elderly people. Professor Kelley and colleagues published an…
The therapy of first choice for treating Seasonal Affective Disorder, winter type, is light treatment. Meta analyses have shown that light therapy in the morning has the highest chance to be successful. In the Netherlands, common practice is 30-45 minutes of bright light therapy in the morning for five consecutive days. If given early in…
Daylight saving time will be set coming Saturday to Sunday. The clock will advance and this is something we can feel well: our biological clock gets upset. Marijke Gordijn, chronobiologist at the University of Groningen explains why: ‘Our brains contain a biological clock. That signals to our body what time it is. Just like old-fashioned…
During the night of Saturday to Sunday daylight saving time will start: the clock will move forward one hour. The discussion to get rid of daylight saving time has been going on for many years. NU.nl asked the experts about their opinion. “I think we can better repeal daylight saving time”, states researcher of human…
December 11th 2015 the sympium Licht -Donker -Slaap (Light- Dark- Sleep) took place at the Beurs van Berlage in Amsterdam. Marijke Gordijn was there to give a lecture regarding ‘when every second counts, the role of sleep and time of day on athletic performance”. Why is sleep an important part of your training-schedule? Does it…
This study examined associations of chronotype and age with shift-specific assessments of main sleep duration, sleep quality and need for recovery in a cross-sectional study among N ¼ 261 industrial shift workers (96.6% male). Logistic regression analyses were used, adjusted for gender, lifestyle, health, nap behaviour, season of assessment and shift schedule. Shift workers with latest versus earliest…
Light is an important environmental stimulus for the entrainment of the circadian clock and for increasing alertness. The intrinsically photosensitive ganglion cells in the retina play an important role in transferring this light information to the circadian system and they are elicited in particular by short-wavelength light. Exposure to short wavelengths is reduced, for instance, in elderly…
