The Zone 4 Challenge

Workout - The Zone 4 Challenge

• 12min @ 6'00''/km
• 20min @ 4'30''/km
• 10min @ 7'30''/km

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Intro

Here’s what The Running Channel’s “If Your Heart Rate Drops Below 150bpm, You LOSE!” is about, simplified for you to test out. It’s worth watching in full, but here’s the core you need to get started today.

Key Points

• How it works: Keep your heart rate in Zone 4 (150–170 bpm). Drop below 150 or spike above 170, and you forfeit a life. The tighter your control, the better.
• What this builds: Zone 4 matches the pace you can sustain for roughly an hour—a threshold effort that strengthens both aerobic capacity and your ability to hold hard work.
• How to nail it: Stay calm out there. Use a Garmin (or compatible watch) to set alerts at 150 and 170 bpm. Stick near the middle of the window so you have room to flex without breaking the rules.

Workout Example

1. Warm‑up – 10 minutes at an easy pace to lift your heart rate into the low‑150s.
2. Main set – Run at a pace that keeps your HR between 150 and 170 bpm. Set your watch to alert you when you slip below 150 or climb above 170.
   • Option A: Five 3‑minute pushes with 1‑minute easy jogging between them, staying within the window.
   • Option B: A single 20‑minute effort, steady in the middle of Zone 4, adjusting pace as needed to hold the target.
3. Cool‑down – 5–10 minutes easy, letting your heart rate drop below 150.

Closing Note

Try the Zone 4 discipline—it sharpens both fitness and mental toughness. The Pacing app lets you set custom heart rate zones and dial in your intervals to match where you’re at right now. Run it, stay locked in, and keep those beats right where they belong.

References

• If Your Heart Rate Drops Below 150bpm, You LOSE! - YouTube (YouTube Video)