How Hard Should Your Interval Training Be? Effort Levels for Every Run! - Lee Grantham

How Hard Should Your Interval Training Be? Effort Levels for Every Run! - Lee Grantham

Intro: This is a quick summary of “How Hard Should Your Interval Training Be? Effort Levels for Every Run!” from Lee Grantham. It’s a great watch — we’re breaking it down so you can try the workout today. Be sure to check out the full video for all the details.

Key Points:

  • Use a 0‑10 RPE (Rate of Perceived Exertion) scale to size up every hard session. 
  • Intervals should feel like an 8‑9/10 effort – you finish in control and could still manage 1‑2 more reps if pushed. 
  • Tempo runs target a 7‑8/10 effort – you can comfortably extend the run 5‑10 minutes beyond the planned finish. 
  • Long runs (LSD) sit around 6‑7/10 – you’d feel you could add ~30 minutes more if needed. 
  • Always ask “What’s the purpose of this run?” (speed, lactate threshold, endurance) before you start, and pace the week accordingly so hard days don’t sabotage recovery.

Workout Example:

  • Interval Session: 20 × 1 min (≈400 m) at RPE 8‑9, finish feeling in control; aim to be able to do 1‑2 extra reps if you had to. 
  • Tempo Run: 30 min at RPE 7‑8; finish knowing you could safely add another 5‑10 min. 
  • Long Run: 90 min at RPE 6‑7; you’d feel you could push another 30 min if the goal is aerobic‑capacity building.

Closing Note: Try these effort‑based paces today, and feel free to adjust the RPE values to match your own fitness in the Pacing app. Running smarter, not harder, will get you faster – keep it controlled, stay consistent, and enjoy the progress!

Remember to watch Lee Grantham’s full video for deeper context and more examples.


References

Workout - 'In Control' Intervals

  • 20min @ 6'30''/km
  • 13 lots of:
    • 1min @ 3'30''/km
    • 1min rest
  • 12min @ 6'30''/km
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