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Crushing Iron Triathlon Podcast

#885 – Heart Rate, Power, or RPE?

Crushing Iron Triathlon Podcast

Mike Tarrolly

Ironman, Nutrition, Triathlon, Podcast, Fitness, Swimming, Training, Coaching, Health & Fitness

4.7 β€’ 724 Ratings

πŸ—“οΈ 23 October 2025

⏱️ 58 minutes

🧾️ Download transcript

Summary

Today we look at the three dominant metrics in triathlon: Heart Rate, Power, and RPE. Which one is right for you, and does that answer change with different variables? We look at things like time of the day, time of the year, and adjusting based on how you feel. We tackle questions like intensity vs. volume and look at different scenarios depending on if you're racing an Ironman or something shorter. We talk Vo2 max and look at whether or not you should even be thinking about it. And we also get into how a lot of triathletes screw up their races with nutrition.

Topics:

  • Wetsuit legal questions
  • Dominant metrics
  • When to use power vs HR vs RPE
  • Does the time of day matter?
  • Different stress from different pools
  • Hot water, cold water, shallow water
  • When are you strongest on the bike?
  • Is HR higher in the morning?
  • Warm ups
  • Lower volume, higher intensity
  • Swim hard, bike aerobic, run hard?
  • Looking at numbers too often
  • How we screw up our races with nutrition
  • Smash test for a 15 hour race?
  • Vo2 Max - small piece of the puzzle
  • Keep it alive and primed
  • Putting in the real volume

Β 

Mike Tarrolly - [email protected]

Robbie Bruce - [email protected]

Transcript

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0:00.0

All right.

0:18.0

All right.

0:18.2

Coming at you live in high fidelity.

0:20.3

In high fidelity.

0:22.1

In high fidelity. It's October.

0:24.0

Seriously, it's October 23rd, the year.

0:27.6

It's 2025.

0:29.5

Welcome to everybody.

0:30.6

You listen to the Crushing Iron podcast.

0:32.4

This is about to be episode 885.

0:36.5

Yeah.

0:38.3

Screaming to you in high fidelity.

0:40.2

Teams is up in the game, man.

0:42.0

Teams is up in the game, right?

0:43.6

Meetings in high fidelity.

0:44.6

Hopefully, we're coming in hot today,

0:48.2

coming in nice clean and crisp to you.

0:50.2

It's a perfect fall weather day here in Nashville, Tennessee.

0:56.0

As my usual pre-morning run, almost got run over by at least 17 cars here in the west end like

1:02.3

Mandarball area.

1:03.2

But yeah, it came back on skates.

1:04.9

But yeah, a beautiful day.

...

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