5K Speed to 10K Strength

Workout - 5K Speed to 10K Strength

• 10min @ 6'00''/km
• 2 lots of:
  • 1.0km @ 4'00''/km
  • 2min 30s rest
• 5 lots of:
  • 1.0km @ 4'30''/km
  • 1min 30s rest
• 8min @ 6'00''/km

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Thinking about moving up from 5K to 10K without losing the speed you’ve built? Lee Grantham’s video lays out a straightforward transition. Here’s his method, with a sample workout you can run this week.

Key points

• Most runners stumble by doubling weekly volume all at once. Grantham’s answer: build interval work at a measured pace week by week. The methodical approach shapes the training philosophy in Mastering Interval Training: Science-Backed Workouts and How a Smart App Can Personalize Them.
• Long run distance can stay roughly where it is. The payoff comes from doing more 5K-style repeats at your new 10K pace.
• To absorb the extra distance without burning out, dial back the 10K-pace repeats at first, around 3:06–3:10/km. The full 10K guide is at Mastering the 10K: Proven Training Plans, Pace Strategies, and How a Smart App Can Elevate Your Performance.
• Steady week-to-week progress beats the occasional big-volume shock.

Workout example

1. Base 5K session. Start with something you know, for example 6 x 1 km at current 5K pace (3:00/km). This builds on Mastering 5K Speed: Proven Interval Strategies to Cut Minutes off Your Time.
2. First transition. Extend interval total to 6.5 km (for example, 6 x 1 km plus 1 x 0.5 km), keeping the same 5K pace.
3. Gradual progression. Each week, add another 0.5 km of intervals until you hit 8 km total (for example, 8 x 1 km). As volume climbs, you can hold 5K pace or shift toward 10K target (around 3:06–3:10/km) to build aerobic fitness.
4. Speed element. Keep finishing speed by mixing in a few faster repeats at 5K pace (for example, 2 x 1 km at 2:50/km) within the session. Most of the work stays at 10K pace; the faster efforts keep leg snap.

Closing note

Try this progression over the coming weeks. Set paces to your current fitness in the Pacing app.

References

• How to Transition from 5K to 10K Training Without Sacrificing Speed - YouTube (YouTube Video)