Negative-Split 5k Challenge

Workout - Negative-Split 5k Challenge

• 10min @ 7'30''/km
• 4 lots of:
  • 100m @ 4'00''/km
• 1.0km @ 6'10''/km
• 1.0km @ 6'05''/km
• 1.0km @ 6'00''/km
• 1.0km @ 5'55''/km
• 1.0km @ 5'45''/km
• 10min @ 8'00''/km

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Intro

The Running Channel has put together a genuinely entertaining challenge — 5k Challenge – Run Faster Every Kilometre Or You Lose! — that’s just as practical to attempt as it is fun to watch. We’ve broken down the key concepts so you can try the negative-split workout right away. Grab the full video to catch all the details.

Key Points

• The negative-split format: You’ll run 5 km where each kilometre drops faster than the one before. After your opening km, ditch your watch and rely on feel.
• Getting your pacing right: Start at a modest tempo—around 5:45 min/km for a typical 5k racer—then drop by roughly 5 seconds per kilometre.
• Strategic use of terrain: Look for a downhill section (ideally around 1 km) somewhere between the 3–4 km mark. This natural advantage helps you kick harder as you approach the finish.
• Staying smooth: Keep your stride consistent and maintain relaxed shoulders; the third km is when your body pushes back hardest, so focus on control and resist jumping the pace too early.

Workout Example

Adjust these pace targets based on your current fitness; the real focus is that steady progression across all five kilometres.

Closing Note

Give the negative-split 5k challenge a shot and use the Pacing app to dial in the right targets for your level. You’ll notice the improvement in speed and confidence as each kilometre gets faster—that finish will feel strong.

References

• 5k Challenge - Run Faster Every Kilometre Or You Lose! - YouTube (YouTube Video)