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circadian rhythm

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Circadian Nutrition

By IDEA Editorial Staff / June 9, 2025

As fitness professionals, we often focus on what our clients eat—macros, calories, and micronutrients. But a growing body of evidence suggests that when they eat is just as critical. Circadian nutrition, an emerging area of chronobiology, explores how meal timing aligned with the body’s natural rhythms can optimize metabolism, energy, performance, and overall health. With…

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Man sleeping in a bed

Best Time for Swimming Performance

By Shirley Eichenberger-Archer, JD, MA / July 7, 2021

There may be an optimal time for swimming: Olympic swimmers clock faster times at 5 p.m., according to research from Stanford University.

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Woman staying up late in front of her computer

Evening Chronotype and Diet

By Matthew Kadey, MS, RD / June 7, 2021

A connection exists between chronotype and diet. If you fall into the evening category, your preference may not bode well for your diet.

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Effects of time of day on training

Does Time of Day Affect Training?

By Shirley Eichenberger-Archer, JD, MA / April 5, 2021

Does time of day influence exercise performance? An international group of researchers reviewed 66 studies on maximal exercise and time of day.

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Sleep Deprivation: You Are How You Sleep

By Beverly Hosford, MA / March 15, 2019

Spending a third of our lives horizontal, hallucinating and paralyzed may sound like something from a scary sci-fi movie—but, in reality, these are good things. It’s all about sleep, and getting enough of it is essential.

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