Sleep patterns may be the most obvious manifestation of the highly individualized biological clocks we inherit, but these clocks also regulate bodily functions from digestion to hormone levels to cognition. Living at odds with our internal timepieces, Till Roenneberg shows, can make us chronically sleep deprived and more likely to smoke, gain weight, feel depressed, fall ill, and fail geometry. By understanding and respecting our internal time, we can live better.Internal Time combines storytelling with accessible science tutorials to explain how our internal clocks work—for example, why morning classes are so unpopular and why “lazy” adolescents are wise to avoid them. We learn why the constant twilight of our largely indoor lives makes us dependent on alarm clocks and tired, and why social demands and work schedules lead to a social jet lag that compromises our daily functioning.Many of the factors that make us early or late “chronotypes” are beyond our control, but that doesn’t make us powerless. Roenneberg recommends that the best way to sync our internal time with our external environment and feel better is to get more sunlight. Such simple steps as cycling to work and eating breakfast outside may be the tickets to a good night’s sleep, better overall health, and less grouchiness in the morning.[Description taken from publisher's web site.]

    That resilience inspired her to write 13 Things Mentally Strong People Don't Do, a web post that instantly went viral, and was picked up by the Forbes website.Morin's post focused on the concept of mental strength, how mentally strong people avoid negative behaviors--feeling sorry for themselves, resenting other people's success, and dwelling on the past. Instead, they focus on the positive to help them overcome challenges and become their best.In this inspirational, affirmative book, Morin expands upon her original message, providing practical strategies to help readers avoid the thirteen common habits that can hold them back from success. Combining compelling anecdotal stories with the latest psychological research, she offers strategies for avoiding destructive thoughts, emotions, and behaviors common to everyone.Like physical strength, mental strength requires healthy habits, exercise, and hard work. Morin teaches you how to embrace a happier outlook and arms you to emotionally deal with life's inevitable hardships, setbacks, and heartbreaks--sharing for the first time her own poignant story of tragedy, and how she summoned the mental strength to move on. As she makes clear, mental strength isn't about acting tough; it's about feeling empowered to overcome life's challenges.