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Healthy circadian rhythms rely on regularity and stability— for the timing of light, the timing of exercise, and the timing of meals.

Our bodies are accustomed to the exposure of light and darkness on a regular basis. The circadian rhythm is reset on a daily basis and it i...

• The game of tennis was originally a game of the rich, played by male players in hats and ties, and women in corsets and bustles.
• It adopted a strict dress code in the 1890s, and white clothing became the official tennis attire. This dress code wasn't a great option for middle-class...

Regular exercise is a great way to boost energy levels, reduce stress, and improve physical and mental health. Successful people make time for exercise, whether it's a morning run, a yoga class, or a quick workout at home.

"Physical fitness is not only one of the most important keys to a he...