This Pro Run Coach Got Me To Run a 16:45 5K

Download the Transcript

Find this podcast on:

(Or search 'Trees Dlake' in your favourite player)

Recently, I thought I had the 5K figured out: mostly aerobic, a dash of speed, nothing fancy. But after a conversation with coach Mike Trees—ex-pro runner, triathlete, and a guy who’s coached thousands—I realized I was leaving a huge part of my potential untapped.

Turns out, the difference between finishing strong and fading hard might have less to do with your mileage and more to do with how much discomfort you’re willing (and able) to handle.

Stop Chasing the Wrong Target Pace

Most runners aim for a time they think they “should” hit, instead of the one their body’s actually ready for. I was doing the same; hammering sessions that looked great on paper but didn’t align with my true strengths.

Mike asked me: “Do you know the real aerobic-to-anaerobic split for a 5K?” I guessed wrong. I thought it was almost entirely aerobic. In reality, if you train smart, you could be running at 25% anaerobic effort. That means short, high-intensity work isn’t optional; it’s essential.

The lesson? Don’t blindly follow the generic 5K plan you downloaded two years ago. Match your training to your physiology, not your ego.

Build Your Tolerance, Not Just Your Threshold

I used to obsess over “lactate threshold”—the point where my body would start to give in to the burn. But Mike flipped that on its head: threshold matters, but tolerance is where the magic happens.

Tolerance is staying smooth when your legs feel like they’re boiling from the inside out. It’s the last kilometer of a race when your brain screams “stop” but your form stays solid. That’s what wins races and breaks PRs.

Science backs it up: athletes with higher lactate tolerance hold pace better when fatigue hits. And here’s the kicker; you can train it. Short, above-race-pace intervals. 3K time trials. A little bit of mile-level effort sprinkled into the week. Done right, this doesn’t wreck your legs. Done consistently, it changes your finish.

This image has an empty alt attribute; its file name is PhotoQuote2-pink-1024x1024.png

Sharpen the Blade, Don’t Swing Harder

When I first started tweaking my sessions, I thought more volume would mean better results. But that just left me tired.

Mike’s approach felt different:

  • 12 x 400m at faster than race pace with generous rest.
  • 8 x 1K to push stamina without overreaching.
  • Parkrun as a weekly time trial to test my readiness.

Each workout felt like honing a knife, not hacking at wood with a blunt axe. The shifts were small, but the effect was sharp. My easy days got easier. My speed sessions got shorter but more targeted. And somehow, I was running faster with less overall strain.

Play to Your Strengths (Even if That Means Breaking “The Rules”)

I’ve always had more speed than endurance; my 800m background made sure of that. But for years I trained like someone chasing a marathon. That mismatch kept me stuck.

Mike’s advice was simple: if you’ve got speed, lean into it. Train like a miler for a block or two before your goal 5K. If you’re built for endurance, focus there, but don’t neglect the high-end work. The key isn’t to copy another runner’s formula. It’s to figure out what you need most right now and double down on it.

Your Brain Is the Gatekeeper

The body can do more than the mind will often allow. In my case, my legs were capable of holding 3:10/km pace for longer than my brain believed. So when the discomfort hit, I’d back off, not because I was spent, but because I hadn’t trained my mind to stay.

This is where tolerance training bleeds into life outside running. You learn to separate discomfort from danger. To feel the burn and keep going. That mental resilience? It transfers. It shows up in your work, in your relationships, in the moments when you’d rather bail but don’t.

The Finish Line

If running were only about times and distances, the spreadsheets would win every time. But the real 1% improvement isn’t just in your splits. It’s in how you train your mind to meet challenge after challenge without folding.

For me, embracing discomfort in training has shifted more than my 5K. It’s taught me how to hold form when life’s last kilometer feels uphill. And maybe that’s the whole point: run not just to finish faster, but to live a little braver.

Links & Learnings