The internal body clock—also known as the circadian rhythm—is something you’ve probably heard of. But did you know that every cell in your body has its own internal clock, and they’re not always perfectly in sync? I didn’t either! That’s why I’ve invited today’s guest, Professor Karyn Esser from the University of Florida, to help us explore this fascinating topic. As Chair of the Department of Physiology and Aging, Karyn and her team have been at the forefront of research on circadian rhythms—specifically how they influence skeletal muscle function and overall health. In this episode, we dive into how your body clock affects training at different times of the day and, crucially, how modern lifestyle habits may be disrupting your natural rhythms—potentially leading to chronic health issues. The good news? Small changes can help restore balance, with regular exercise playing a key role. Topics we cover in this episode: ✅ Do circadian rhythms differ between men and women? ✅ How do they change with age? ✅ Are ‘lark’ and ‘owl’ chronotypes an urban myth? ✅ When is the best time for aerobic training, strength training, and stretching? ✅ How can we manage jet lag and shift work effectively? If you've ever wondered how to optimise your training and lifestyle based on your body clock, this episode is for you! To find out more about Karyn’s work please. visit the following channels BlueSky: @kaesser LinkedIn: https://www.linkedin.com/in/karyn-esser-a187333/ Karyn also recommended the folowing resourescv that you kight like to check out ZOE Podcast - The best time to exercise BOOK Recommendation - The Inner Clock: Living in Sync with Our Circadian Rhythms by Lynne Peeples **To get a free copy of my personal daily mobility routine, please click HERE ** **To download your FREE infographic ‘7 steps to swimming faster’, please click HERE Join our SWAT/High Performance Human tribe using this link, with a happiness guarantee! You can watch a brief video about the group by going to our website here , and join our SWAT High Performance Human tribe here . You can find all of my social media links HERE : You’ll also find some really great content on my Instagram and YouTube! Instagram YouTube Sign up for Simon’s weekly newsletter Sign up for Beth’s weekly newsletter To contact Beth regarding Life Coaching, please visit her website at BethanyWardLifeCoaching.uk . If you would like to help offset the cost of our podcast production, we would be so grateful. Please click here to support the HPH podcast . Thank you! Visit Simon's website for more information about his coaching programmes. For any questions please email
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