Dr Alexander Zeuke provides cutting-edge information on how to improve your environment and lifestyle to enhance the two decisive mechanisms that lead to healthy sleep: Circadian Rhythms and Sleep Drive.Among the many facts and practical interventions, you will discover:How much sleep we need and ways to self-analyse sleep.How to optimise circadian rhythms for better sleep.How the regenerative effects of natural light enhance sleep.How circadian temperature variations affect sleep.How the right timing of food intake and physical activity enhances sleep drive and circadian rhythms.How to analyse your chronotype and optimise the biorhythms to achieve restorative sleep without supplements or medication.Each chapter of the book provides conscious problem awareness and achievable solutions for people who have insomnia, social jetlag and circadian rhythms disorders. Sleep Timer uncovers the root cause of insomnia and how to optimise sleep under the environmental pressure of modern societies.