#202: Why Am I Gaining Weight Overnight? (Water Weight, PMS & Cortisol Explained)

If you've ever felt like you gained 1–2kg overnight despite eating well and training consistently, this episode is for you. In today's episode, I'm breaking down the real reasons behind water weight fluctuations – and why rapid changes on the scale are almost never body fat. I share my own recent experience with frustrating weight fluctuations (including one I'm currently navigating), and explain what's actually happening physiologically when your weight suddenly shifts. I cover: ✅ How stress and cortisol cause fluid retention ✅ The sleep–cortisol cycle – and why poor sleep makes fluctuations worse ✅ The signs your cortisol may be out of balance ✅ The hidden, everyday stressors that keep your nervous system switched on ✅ Why water retention peaks before your period ✅ How low progesterone can amplify PMS and pre-period bloating ✅ The impact of carbs, salt and strength training on the scale ✅ This episode is your reminder that your body is responsive – not broken. Understanding what drives these fluctuations is incredibly freeing. It allows you to stop panicking, stop over-correcting, and instead take the right steps to stabilise things while continuing to move forward with your weight loss goals. If you're ready to properly understand your body and stop fearing normal fluctuations, this is a must-listen 💚 Links mentioned: : Chronic Stress & Burnouts Link To Tummy Fat & Halted Goals. It's Time To Step Up the Self Care : Coffee, Cortisol & Your Morning Routine: Is It Okay to Drink Coffee on an Empty Stomach? : How to Live Longer & Stronger: The Science of Early Disease Detection with Dr Steven Lu : Is Hidden Inflammation Keeping You Bloated, Puffy & Stuck With Your Weight? Start your weight loss, gut-healing, and anti-inflammatory journey now with my 3 Week Body Reset Continue your journey and make it sustainable by figuring out YOUR own balance in the Health with Bec Tribe Follow me on Instagram: @health_with_bec Visit my website: Click here

You can listen to #202: Why Am I Gaining Weight Overnight? (Water Weight, PMS & Cortisol Explained) online on Radio and Podcast. Open the player on this page to stream the available audio.

#202: Why Am I Gaining Weight Overnight? (Water Weight, PMS & Cortisol Explained) is an episode from Body Bites With Bec by Bec Miller.

This episode is 56:17 long.

This episode was published on Feb 17, 2026.

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