#29: Why Your Energy Tanks After 40 (And How to Fix It)

The High Performance Gym

You're training, you're eating right, and you're doing everything they say you should—so why do you still feel exhausted? Why do your workouts feel harder, your body feel weaker, and your progress seem slower?

What if the problem isn’t your metabolism? What if the solution isn’t more cardio, stricter dieting, or doubling down on what worked in your 20s and 30s?

In this episode, Keir Wotherspoon cracks open the real reason your energy tanks after 40—and it’s not what mainstream fitness advice would have you believe. He reveals a hidden factor that could be making you feel sluggish, weak, and constantly drained. And the good news? Once you know what’s causing it, you can start reversing it today.

What you’ll uncover in this episode:

🔹 The biggest lie about metabolism after 40—and what’s really happening in your body

🔹 The forgotten piece of the fitness puzzle that controls your energy, metabolism, and ability to burn fat

🔹 The dangerous fitness trap that’s leaving so many women weaker instead of stronger

🔹 The 7 fitness benchmarks every over-40 high performer should aim for (and why they matter)

🔹 How to reclaim your energy, strength, and resilience—without spending hours in the gym

This is an episode that could change everything about how you train, eat, and think about your body after 40.

Time Stamps:

00:00 - Welcome to The High Performance Gym Podcast – Who this podcast is for and why it’s different.

02:10 - The DIY Podcast Setup & A Bigger Lesson – Keir’s less-than-glamorous recording setup and what it reveals about taking action (hint: perfection is the enemy).

06:45 - The Energy Crash After 40: Is It Really Inevitable? – The frustrating reality so many face and why most advice out there misses the mark.

09:30 - The Hidden Factor Behind Fatigue & Slower Results – It’s not what you think, but it affects everything from how you burn calories to how you recover.

13:00 - The Truth About ‘Aging Metabolism’ – What’s really happening when you feel like your workouts aren’t working anymore.

22:00 - A Common Mistake That’s Making It Worse – Many people (especially women) unknowingly sabotage their energy and strength with this fitness approach.

27:15 - How to Reverse the Energy Decline – The key strategies to rebuild your vitality, boost your metabolism, and feel strong again.

42:00 - The 7 Fitness Benchmarks You Should Aim For – Can you check off all seven? If not, it’s time to level up.

52:30 - One Simple Challenge to Get Started Today – A small shift that could make a massive difference in how you feel.

55:00 - Take the Warrior Woman Scorecard – Find out where you stand and get a personalized energy & muscle health plan (link in show notes).

Resources Mentioned:

📊 Warrior Woman Energy Quiz – Discover your energy score and get a tailored plan

🏋️ LIFT Performance Academy – High-performance coaching for female athletes & professionals

📲 Follow Keir on Instagram & LinkedIn.