Age is a complex cross-cutting notion for at least two reasons: the intricate interweaving of its biological and socio-cultural meanings and its dual significance as both a benchmark in an individual's life course and a foundation for social structure. This book offers new perspectives on age and ageing by combining achievements in the biological sciences and their different applications and interpretations in demography, anthropology, psychology and other pertinent disciplines. Thirty contributors from these various fields revisit the measures and the biological models of ageing, the borderline between normal and pathological ageing, the pertinence of chronological age as a benchmark along the life course, its interrelations with psychological development, with reproductive phases and other life events, the «normalizing» role ascribed by age classes and the risk of falling into ageism, the cross-cultural diversity and temporal changes of its meanings, the gender divide (real and perceived), as well as the rights that should be enjoyed at each age.

Supercharge your body’s clock to gain a positively unfair advantage in business and life. What if there is a surefire time in a day to naturally heighten your focus and concentration? Are you tired of dieting and rigorous exercise regime, but not seeing success with fat loss? Do you have difficulty waking up at the same time every day without an alarm clock? This step-by-step guide to optimized body’s clock design teaches: - Science-backed strategies to synchronize your circadian rhythm for optimal performance - Proven practices to lose 4.19 pounds naturally in as little as 2 weeks without giving up the food you love and paying for expensive programs that don’t work - Scientific approach to organize your time productively, so that you can get your work done faster and at double the quality to deliver even more - Latest technology and science to help you sleep better and perform at your best - Essential plan to enjoy the comfort of healthy living without losing your mind - Natural energy boosters to train harder Peak Human Clock helps you reset your biological clocks to maximize every hour of your day.

Circadian Rhythm is the natural, 24-hour body's clock, regulating all the body's organ clocks. By learning how to harness all the natural energies within our physical bodies, everyone can become healthier, more energetic, and productive

The ability at the molecular level to keep track of time is a property shared by organisms ranging from the simplest unicells to humans. The primary feature of these biological clocks is their ability to entrain to environmental stimuli. The dominant stimulus comes from environmental light cues, which requires the existence of photopigments sensitive to light. The exact identity of the molecules involved in circadian photoreception has remained elusive. The classical view of the circadian system is of diverse physiological rhythms regulated by a centralized clock structure. This book presents evidence that challenges this view. Experiments in both vertebrate and invertebrate systems demonstrate that the circadian timing system is dispersed throughout the animal and suggest that possibly every cell contains an autonomous clock mechanism. A variety of tissues and cells contain have been shown to maintain an oscillation when placed in vitro and removed from any external cues or signals that originate from the classical clock structures and/or the environment. This book draws together contributions from an international and interdisciplinary group of experts whose work is focused on all aspects of the topic. Coverage includes the mechanisms of light signalling to the vertebrate clock, the connections between central and peripheral clocks, circadian gene expression patterns and output pathways of clock mechanisms.

With the invitation to edit this volume, I wanted to take the opportunity to assemble reviews on different aspects of circadian clocks and rhythms. Although most c- tributions in this volume focus on mammalian circadian clocks, the historical int- duction and comparative clocks section illustrate the importance of various other organisms in deciphering the mechanisms and principles of circadian biology. Circadian rhythms have been studied for centuries, but only recently, a mole- lar understanding of this process has emerged. This has taken research on circadian clocks from mystic phenomenology to a mechanistic level; chains of molecular events can describe phenomena with remarkable accuracy. Nevertheless, current models of the functioning of circadian clocks are still rudimentary. This is not due to the faultiness of discovered mechanisms, but due to the lack of undiscovered processes involved in contributing to circadian rhythmicity. We know for example, that the general circadian mechanism is not regulated equally in all tissues of m- mals. Hence, a lot still needs to be discovered to get a full understanding of cir- dian rhythms at the systems level. In this respect, technology has advanced at high speed in the last years and provided us with data illustrating the sheer complexity of regulation of physiological processes in organisms. To handle this information, computer aided integration of the results is of utmost importance in order to d- cover novel concepts that ultimately need to be tested experimentally.

Explores the many aspects of circadian rhythms, from jet lag to biorhythms to "forbidden phases" of sleep when one cannot awaken spontaneously.

This book provides the reader with a contemporary and comprehensive overview about the molecular, cellular and system-wide principles of circadian clock regulation. Emphasis is placed on the importance of circadian clocks for the timing of therapeutic interventions.