In this episode of Untidy, Matilda and Hannah are joined by internationally renowned exercise physiologist and nutrition scientist Dr Stacy Sims — a trailblazer on a mission to revolutionise how women train, eat, and perform.
Known for her viral TED Talk “Women Are Not Small Men”, bestselling book Roar, and over 100 peer-reviewed papers, Stacy has dedicated her career to closing the gender gap in sports science. In this conversation, she dives into the often-overlooked physiological and emotional challenges girls face during puberty — challenges that are too often misunderstood or ignored, causing many to lose confidence and drop out of sport.
With her new course NEXT GEN, Stacy is focused on educating coaches and parents to better support developing girls. She explores how puberty impacts performance, confidence, and injury risk, and why it’s crucial to rethink how we train and talk to our daughters. From the damaging effects of language like “girl pushups” and “sissy squats,” to the ripple effects of diet culture and uniform design, Stacy highlights the changes we need to make — and how to do it.
This episode is a rallying cry to shift the culture around girls’ health, sport, and self-image — and to give them the tools, language, and support they deserve.
Links and resources discussed in the show:
- Dr Stacy Sims – Courses & Resources
- Follow Dr Stacy Sims @drstacysims.
- Book: Roar by Dr Stacy Sims
- Book: Welcome to Your Period – Yumi Stynes & Dr. Melissa Kang
- Where to watch: Girls Can’t Surf – Documentary
- Banff Centre Mountain Film Festival On Demand
If you’re enjoying Untidy, the best way to show your support is by tapping the ‘+ follow’ button in your podcast app and subscribing on YouTube! That way, fresh episodes will always be ready and waiting for you. Help us to keep building this supportive community — share an episode with a mate, and chuck us a 5-star review — it helps more people find our Untidy, unfiltered, and relatable chats. Thank you for listening, contributing and supporting this independent production! We’re grateful to have you here! — Hannah & Matty xx
Don’t forget! Untidy is made for YOU — the people right at the heart of this steaming hot mess! Follow the show and DM us on Instagram @untidypodcast or email hello@untidypodcast.com. Your stories and ideas to help shape the show! Find us online at Untidy podcast. Find Matilda at @matootles and get your copy of The Feel Good Guide. Find Hannah at @hannahedavison and her My Big Moments children’s books
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