Plans, paces & PBs Set the rhythm
Establish sub-20 pace with 1km and 800m work, supported by easy running.
5K Training Plan
Sub 20 5k Training Plan
20-minute 5K essentials
What pace do you need to run a sub-20-minute 5K?
Exactly 20:00 requires an average of 4:00/km or about 6:26/mile. This plan targets 3:59/km (6:25/mile), giving you a small racing buffer while building the speed and endurance needed to hold it.
- Race Threshold
- 4:00/km · 6:26/mile
- The average pace for exactly 20:00.
- Plan Target
- 3:59/km · 6:25/mile
- A small buffer so race day does not depend on perfect pacing.
- Training Week
- 6 runs in build weeks
- The recovery week cuts the load to 2 runs.
- Training Period
- 8–12 weeks
- Repeat the four-week block two or three times.
Suggested Race Splits
These use the plan's 3:59/km target and leave a small margin around the goal.
1 km3:59
2 km7:58
3 km11:57
4 km15:56
Finish19:55
Sharpen and strengthen
Add faster 400m repetitions, hills, and another 800m session.
Specific strength
Combine hills, fartlek and 1km race-pace work before backing off.
Absorb and reset
Reduce impact, keep the legs ticking over, and prepare to repeat or taper toward a race.
Week-by-Week
Sub 20 5k Training Plan
Follow the rhythm of the block: easy days protect the quality days, and recovery protects the next block.
Week 1
Set the rhythm
Establish sub-20 pace with 1km and 800m work, supported by easy running.
Monday
Easy Breakeven
30 min easy
Controlled aerobic running. Finish feeling better than you started.
No quicker than 8:25/mile
Tuesday
Intervals Breakthrough
5 x 1km
Run each rep at target 5k pace.
4:00/km / 6:25/mile 90s jogged recovery
Wednesday
Easy Breakeven
30 min easy
Keep this genuinely easy and relaxed.
No quicker than 8:25/mile
Thursday
Intervals Breakthrough
6 x 800m
Race-pace repetitions to build confidence and economy.
3:12 per 800m / 6:25/mile 200m jogged recovery
Friday
Rest Recovery
Rest or cross-train
Absorb the two quality sessions. Easy bike, swim or mobility only if it helps.
Saturday
Easy Breakeven
30 min easy
Relaxed shakeout before the long run.
Comfortable only
Sunday
Long run Breakeven
Long run
Slow and steady aerobic run, kept under an hour.
Easy conversational pace
Week 2
Sharpen and strengthen
Add faster 400m repetitions, hills, and another 800m session.
Monday
Easy Breakeven
30 min easy
Keep the legs moving without adding fatigue.
No quicker than 8:25/mile
Tuesday
Intervals Breakthrough
10 x 400m
Sharper than race pace, but controlled. Do not turn the first five into a race.
93s per 400m / 6:15/mile 60s standing recovery
Wednesday
Easy Breakeven
30 min easy
Recovery run. Keep it soft and boring in the best way.
No quicker than 8:25/mile
Thursday
Hills Breakthrough
Hills
Use Kenyan hills or hill sprints to build power, form and strength.
Hard but controlled effort Jog back / controlled recovery
Friday
Rest Recovery
Rest
Protect the Saturday quality work. Rest is part of the plan, not a weakness.
Saturday
Intervals Breakthrough
6 x 800m
Repeat the 800m session and aim for calm consistency.
3:12 per 800m / 6:25/mile 200m jogged recovery
Sunday
Long run Breakeven
Long run
Slow and steady aerobic run, kept under an hour.
Easy conversational pace
Week 3
Specific strength
Combine hills, fartlek and 1km race-pace work before backing off.
Monday
Easy Breakeven
30 min easy
Reset after the long run. Keep this relaxed.
No quicker than 8:25/mile
Tuesday
Hills Breakthrough
Hill sprints
Short, powerful efforts focused on form and drive.
Fast but controlled Full walk/jog recovery
Wednesday
Fartlek Breakeven
Fartlek run
Unstructured speed play. Vary the effort without chasing exact splits.
Mixed effort
Thursday
Intervals Breakthrough
5 x 1km
Return to target 5k pace and practise rhythm.
4:00/km / 6:25/mile 90s jogged recovery
Friday
Rest Recovery
Rest or cross-train
Back off and let the race-specific work land.
Saturday
Easy Breakeven
30 min easy
Easy aerobic running only.
Comfortable only
Sunday
Long run Breakeven
Long run
Slow and steady aerobic run, kept under an hour.
Easy conversational pace
Recovery Week
Absorb and reset
Reduce impact, keep the legs ticking over, and prepare to repeat or taper toward a race.
Monday
Rest Recovery
Rest or cross-train
Low-impact movement only if it helps recovery.
Tuesday
Rest Recovery
Rest or cross-train
Keep the load low. No heroics.
Wednesday
Tempo Breakthrough
Tempo run
Controlled tempo insertion, not a full race effort.
Include 3 miles at 6:40/mile
Thursday
Rest Recovery
Rest or cross-train
Prioritise freshness.
Friday
Easy Breakeven
30 min easy
Gentle running to keep the legs moving.
Easy only
Saturday
Rest Recovery
Rest or cross-train
Stay patient and absorb the block.
Sunday
Rest Recovery
Rest or cross-train
Finish the cycle fresh enough to repeat or sharpen.
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Session Guide
What each session is doing
Breakeven sessions maintain and support. Breakthrough sessions move the target forward.
Target Pace
6:25/mile / 3:59-4:00/km
The rhythm you need to break 20 minutes.
Treadmill equivalent9.3 mph / 15.0 km/h
400m split96s at race pace
800m split3:12
Breakeven sessions
These maintain fitness, support recovery and prepare you for the breakthrough sessions.
Easy / steady runRun by feel, no quicker than 8:25/mile. Focus on recovery, posture and relaxed form.
Long runSlow and steady, kept under 1 hour. This supports endurance without draining the speed work.
FartlekUnstructured speed play. Use it to vary pace without obsessing over exact splits.
Breakthrough sessions
These are the challenging sessions that move you toward sub-20. Treat them as controlled milestones, not tests of ego.
400m repsRun around 93 seconds per 400m, roughly 6:15/mile pace, with 60 seconds standing recovery.
800m repsRun 3:12 per 800m, around 6:25/mile pace, with a 200m jogged recovery.
1km intervalsRun 4:00 per km, around 6:25/mile pace, with 90 seconds jogged recovery.
HillsAlternate Kenyan hills and hill sprints to balance strength, power and endurance.
Quick Answers
5K training plan questions
Clear answers on pace, readiness and how to adapt the plan without mangling its purpose.
What pace do I need to run a sub-20-minute 5K?
Exactly 20:00 is 4:00/km or about 6:26/mile. The plan targets 3:59/km or 6:25/mile to provide a small buffer.
How many days a week should I run?
The full build weeks contain 6 running days, including deliberately easy running. If you need to remove a day, drop an easy run first and preserve recovery between the quality sessions.
How long should I follow this plan?
Use the three build weeks and one recovery week as a repeatable block. Most runners should allow eight to twelve weeks, completing two or three blocks before their target race.
What current 5K time should I have before starting?
Best suited to runners already close to 20 minutes or able to run under around 22 minutes.
Which sessions matter most?
The race-pace repetitions develop your target 5K rhythm. Easy runs and the long run build the aerobic support, while the recovery week lets the training take effect.