There's a line Mark Lusk says in the clinic almost every week that usually gets a laugh — and then a very uncomfortable silence. "You're not injured because you turned 42. You're injured because you're still training like you're 27." Because deep down, most athletes over 40 already know it's true. They've felt it. They're just not sure what to do about it.

In this episode, Mark breaks down the five most common mistakes he sees athletes make after 40 — the patterns that quietly turn normal training wear into chronic pain, frustration, and the dreaded feeling that the body is betraying them. From treating intensity like an identity to letting recovery slip to the bottom of the priority list, each mistake is something Mark sees constantly in the clinic and, by his own admission, in the mirror. He reframes the entire conversation around what actually changes after 40 — not the ceiling, but the margins — and closes with a tight, actionable framework for training smarter, staying durable, and building capacity not just for this season but for decades.

Key Takeaways

• After 40, your body doesn't fall apart — it becomes less forgiving. That's a very different story
• Treating intensity as identity is one of the most common and costly mistakes masters athletes make — recovery capacity shifts with age, and the recovery window lengthens
• Sleep restriction alone impairs muscle protein synthesis and elevates cortisol — recovery isn't soft, it's structural
• Running the same program year-round causes tissues to accumulate load without variation — the adaptation looks like stagnation
• Periodization is not just for Olympians — it's for 48-year-old executives who want to ski without knee pain
• Ignoring signals costs people the most time — after 40, healing takes longer and regaining strength takes longer
• The pain intervention threshold: if it hurts consistently with a specific movement, or constantly, get it checked.
• The five-point framework: cap high intensity to 1–2 sessions per week, film one lift per week, protect sleep like it's training, schedule one lower load week every 4–6 weeks, address small pains within 10 days

Chapter Timestamps

0:00 - The line Mark says in the clinic every week — and the silence that follows

0:21 - Introducing the 5 mistakes athletes make after 40

0:26 - Welcome to Cue the Burn

1:10 - Who Mark works with — and why he's talking to himself too

1:46 - The spoiler: it's not just age. It's strategy.

2:16 - Cumulative static: what the noise sounds like before it becomes pain

2:46 - Mistake #1: Intensity as identity

3:55 - Mistake #2: Movement quality drift

5:25 - Mistake #3: Recovery as an afterthought

7:04 - Mistake #4: Living in the rut — running the same program all year

8:49 - Mistake #5: Ignoring signals

10:25 - The five-point framework to take away

10:51 - The mental reset — you're not trying to win Tuesday

11:00 - The fire that burns longest is the one that's tended

Resources Mentioned

• MVMT Physical Therapy: www.mvmtpt.com
• Social: @MVMTPT
• Book a Discovery Visit: mvmtpt.com