The Science of Exercise for Women 40+: What to Prioritise (And What to Ignore) | Dr Lauren Colenso-Semple and Dr Alyssa Olenick

In this episode, I’m joined by Dr Lauren Colenso-Semple and Dr Alyssa Olenick to help cut through the noise around women’s training in midlife. I’d been hearing the same frustration again and again from women in my community: “I’m doing everything right, but I’m not getting the results I expected.” Between shifting goals, changing bodies, and a constant stream of conflicting advice online, it’s easy to end up second guessing your programme.

Our aim here is to reorient you towards what actually matters. We talk about why resistance training becomes non negotiable for long term function, how to make your sessions effective without turning exercise into another overwhelming life admin task, and why so much of the confusion comes from mismatched expectations, not a broken body.

What We Cover

  • Why so many women feel like they are working hard, but not training effectively for the outcome they want
  • The simplest way to audit your week of exercise and spot what’s missing
  • A practical full body resistance training framework that does not require a perfect programme
  • How to choose loads that are actually challenging, without fear of “doing it wrong”
  • Why DEXA and other metrics can distract you from the most useful markers of progress
  • The role of cardio for health, and why intensity and enjoyment both matter
  • The real story on cortisol, “overtraining”, and why fear based exercise messaging backfires
  • How nutrition, protein, and consistent intake influence training outcomes and body composition

If you’ve felt confused, stuck, or overwhelmed by fitness advice in your forties and beyond, this conversation will help you simplify the plan and regain confidence. Start with the basics, stick with them long enough to see progress, and focus on the inputs you can control.

  • Intro (00:00)
  • The Real Reason Your Fitness Progress Has Stalled (02:00)
  • Why Women Should Lift Heavy (10:40)
  • Maximize Your Training ROI ( 21:29)
  • Fitness Fact vs. Fiction (34:17)
  • How Your Body Changes with Age (40:59)
  • The Busy Woman’s Guide (53:30)
  • Why Reps & Rest Matter ( 1:11:54)
  • Which Goal Should You Prioritize in Midlife? ( 1:29:52)
  • Eating for Muscle Growth (1:44:43)
  • Building Muscle While Losing Fat (1:54:36)
  • Finding Workouts You Love (2:09:13)
  • HIIT, Zone 2, and What Your Heart Really Needs (2:14:58)
  • Balancing Cardio Intensities (2:25:14)
  • Signs Your Cardiovascular Training is Actually Working (2:30:25)
  • Midlife Fitness Truths (2:38:02)
  • Final Takeaways: Strategies for Longevity (2:47:29)

Connect with Dr Lauren Colenso-Semple on Instagram and at drlaurencs.com. Follow Dr Alyssa Olenick on Instagram, listen to The Messy Middle Podcast, subscribe on YouTube, and visit doclyssfitness.com for practical, science based guidance on training and midlife health.

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More about Lauren Colenso-Semple

Dr Lauren Colenso-Semple, PhD is a science communicator with expertise in female physiology and exercise. She holds a Ph.D. in Integrative Physiology from McMaster University and a Master’s in Exercise Science from the University of South Florida. Through her research, teaching, public speaking, and online platforms, Lauren is known for making complex topics accessible – and for calling out the myths that hold women back from reaching their full potential. She is also a seasoned fitness professional with extensive hands-on coaching experience and a co-owner of the MASS Research Review, where she helps bridge the gap between cutting-edge research and practical fitness strategies.

More about Alyssa Olenick

Dr Alyssa Olenick holds a Ph.D. in Exercise Physiology is a certified sports nutritionist and Crossfit Level 2 Trainer. Alyssa completed her doctoral training in exercise and human metabolism, sex differences and menstrual cycle physiology. She is currently a postdoctoral research fellow researching the areas of menopause and metabolism. As a coach she specializes in the areas endurance, strength and hybrid training. She runs her online business ‘Doc Lyss Fitness’ and is a strength athlete, ultra-marathon runner, and all-around fitness lover who is passionate about educating people on science-based fitness to get them into the gyms and on the roads/trails – or often, doing both at the same time! You can learn more about Dr Alyssa Olenick and her programs at www.doclyssfitness.com

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