Treadmill WorkoutsSpeed Builder: a 6-week treadmill plan to run a faster 5K
Speed Builder is for runners who can already cover 5K and want to get quicker. Each week mixes easy runs, one interval session with hard efforts of one to five minutes, and a long run that builds to 45 minutes. Together they improve both your speed and your stamina.
- Level
- Intermediate
- Goal
- Run faster
- Length
- 6 weeks
- Sessions
- 23 in total, 3–4 a week
- Session length
- 25–56 minutes
- Start if
- You can run 5K and are happy running four times a week.
- You will finish with
- Hard intervals of up to five minutes, and a 45-minute long run.
Your first Speed Builder workout is free in the app, then try the full plan free for 7 days.
Who it’s for
- You want a faster 5K or parkrun time
- You can run 5K four times a week
- You want structure beyond running the same easy pace every time
How it progresses
Weeks 1–3
Easy runs of 20 to 25 minutes, one interval session with one to 90-second hard efforts, and a long run of 30 to 40 minutes.
Weeks 4–5
Longer hard efforts of two to five minutes, and a long run of up to 45 minutes.
Week 6
Shorter, sharper 30-second efforts and lighter runs, so you finish fresh.
The full Speed Builder schedule
Every session in the plan, drawn to the same time scale. Choose walking and running speeds that feel right for you; the plan builds time, not pace.
WalkRunRun hard
Week 1
Session 130 min
Warm up 5 min, then Run 20 min, then cool down 5 min.
Session 240 min
Warm up 3 min, then Run 10 min, Walk 1 min, 4 × (Run hard 1 min, Walk 2 min), Run 10 min, then cool down 4 min.
Session 327 min
Warm up 3 min, then Run 20 min, then cool down 4 min.
Session 437 min
Warm up 3 min, then Run 30 min, then cool down 4 min.
Week 2
Session 129 min
Warm up 3 min, then Run 22 min, then cool down 4 min.
Session 241 min
Warm up 3 min, then Run 10 min, Walk 1 min, 5 × (Run hard 1 min 30 sec, Walk 2 min 30 sec), Run 5 min, then cool down 2 min.
Session 325 min
Warm up 3 min, then Run 20 min, then cool down 2 min.
Session 440 min
Warm up 3 min, then Run 35 min, then cool down 2 min.
Week 3
Session 128 min
Warm up 3 min, then Run 23 min, then cool down 2 min.
Session 246 min
Warm up 3 min, then Run 10 min, Walk 1 min, 5 × (Run hard 1 min 30 sec, Walk 2 min 30 sec), Run 10 min, then cool down 2 min.
Session 330 min
Warm up 3 min, then Run 25 min, then cool down 2 min.
Session 445 min
Warm up 3 min, then Run 40 min, then cool down 2 min.
Week 4
Session 133 min
Warm up 3 min, then Run 10 min, Walk 1 min, Run hard 5 min, Run 10 min, then cool down 4 min.
Session 248 min 30 sec
Warm up 3 min, then Run 10 min, Walk 1 min, 5 × (Run hard 2 min, Walk 2 min 30 sec), Run 10 min, then cool down 2 min.
Session 327 min
Warm up 3 min, then Run 20 min, then cool down 4 min.
Session 452 min
Warm up 3 min, then Run 45 min, then cool down 4 min.
Week 5
Session 133 min
Warm up 3 min, then Run 25 min, then cool down 5 min.
Session 256 min
Warm up 3 min, then Run 10 min, Walk 1 min, 5 × (Run hard 3 min, Walk 3 min), Run 10 min, then cool down 2 min.
Session 331 min
Warm up 3 min, then Run 25 min, then cool down 3 min.
Session 441 min
Warm up 3 min, then Run 35 min, then cool down 3 min.
Week 6
Session 137 min
Warm up 3 min, then Run 25 min, 6 × (Run hard 30 sec, Walk 30 sec), then cool down 3 min.
Session 231 min
Warm up 3 min, then Run 25 min, then cool down 3 min.
Session 336 min
Warm up 3 min, then Run 30 min, then cool down 3 min.
Follow it without watching the clock.
In Treadmill Workouts, every session above is guided. The app announces each walk and run, shows what is coming next, and logs the workout when you finish.
Tips for Speed Builder
- Keep the easy runs easy. They make the hard sessions possible.
- In interval sessions, choose a speed you can hold for every rep, not just the first one.
- Put your long run on the day you have most time.
Speed Builder questions
How do I run a faster 5K on a treadmill?
Combine easy running with regular interval sessions. Short, hard efforts teach your body to run faster, and the easy runs build the endurance to hold that pace for 5K. Speed Builder schedules both for you.
How many days a week is Speed Builder?
Four sessions a week for five weeks, then three in the final week: 23 sessions in total, lasting 25 to 56 minutes.
What speed should I use for the hard intervals?
Somewhere around your best 5K pace or a little faster. You should finish each rep breathing hard but able to start the next one after the walking recovery.