Some workouts feel like homework. A fartlek run feels like recess. It's the one speed workout where nobody hands you a stopwatch, a lane assignment, or a pace you're supposed to hit. You simply run faster when you feel like it, ease off when you don't, and somehow finish fitter than when you started.
If intervals have always sounded like something for "real runners," this is the workout I'd love you to try first. It works at any age, any size, and any speed, including a run walk pace.
What is fartlek? (yes, it's a real word)
Fartlek is Swedish and it means speed play. A Swedish coach named Gösta Holmér came up with it in the 1930s to help his cross country team, and runners have been giggling at the word and getting faster with it ever since.
A fartlek run is a continuous run where you keep changing speed. You jog easy, then surge faster for a stretch, then settle back to easy without ever stopping. The surges can last ten seconds or three minutes. They can be "kind of quick" or "whoa, okay." There are no rules about how fast, how long, or how many. That's the whole point.
Underneath the playfulness, real training is happening. The surges teach your legs to turn over faster, and because you jog between them instead of standing around, your heart rate stays up the entire time. You're building speed and endurance in one workout that never feels like a test.
Fartlek vs intervals vs tempo runs
These three get lumped together as "speed work," but they feel very different on the road:
| Fartlek run | Interval training | Tempo run | |
|---|---|---|---|
| Structure | None required, surge on feel | Set distances or times with set rest | One sustained block at a steady effort |
| Recovery | Easy jogging, you never stop | Standing or walking rest between reps | No recovery, it's one continuous effort |
| Pacing | By feel, no watch needed | Target paces, watch or track helpful | "Comfortably hard," fairly precise |
| Best for | Beginners, easing into speed, fun | Sharpening specific race paces | Building stamina at faster paces |
| Pressure level | Low | High | Medium |
The benefits of fartlek training
- You get faster without a track. Regular surges recruit the same muscles and energy systems as formal speed work, which is a big piece of how to run faster at any level.
- Your heart works the whole time. Because you jog instead of standing between surges, your average heart rate stays higher than in a classic interval session.
- Zero pace pressure. There's no split to miss, so there's no way to fail the workout. For many women I coach, that alone is the difference between doing speed work and skipping it.
- It bends to your day. Feeling strong? Surge longer and harder. Tired, sore, or getting back from a break? Keep the surges short and gentle. Same workout, your rules.
- It works anywhere. Neighborhood, park, treadmill, trail, hilly routes, vacation streets you've never seen. If you can run there, you can fartlek there.
- It's genuinely fun. You will feel a little silly racing a mailbox. That's a feature, not a bug.
3 beginner fartlek workouts (no watch required)
Warm up with 10 minutes of easy jogging or brisk walking first, and finish each of these with 5 to 10 easy minutes to cool down. During surges you should feel quick but in control, like you could keep it up a bit longer if you had to. If you're currently run walking, surge to a gentle jog and recover with a walk. Same game, same benefits.
1. The lamppost game
The classic. On an easy run, pick a lamppost (or telephone pole, or tree) up ahead and run faster until you reach it. Then jog easy until your breathing settles, pick a new target, and go again. Start with 6 to 8 surges spread through a 20 to 30 minute run. Short targets for short, zippy surges. Distant ones when you're feeling brave.
2. The mailbox run
Perfect for neighborhood loops. Jog easy past two mailboxes, then pick up the pace past the next one. Repeat: two easy, one quick. When that starts feeling comfortable after a few weeks, flip it to one easy, one quick. The mailboxes do all the counting so your brain gets the day off.
3. The playlist fartlek
Made for treadmill days and anyone who runs to music. Run easy for the length of one song, then pick up the pace for the chorus of the next one, or for a whole song if it's a short, punchy track. Recover through the following song and repeat for 25 to 30 minutes. Build the playlist in advance and let it coach you.
Tip: One fartlek run a week is plenty. Keep your other runs easy and conversational, and give yourself at least one rest day after speed play, especially if you're over 45 or newer to running. Speed makes you fitter during the recovery, not during the surge.
Why fartlek is perfect if the track intimidates you
Here's what I hear from beginners about interval workouts: the track feels exposed, the paces feel like a judgment, and the whole thing seems built for people who already run fast. If you're in your 40s, 50s, or beyond and you started running to feel good rather than to compete, standing on a track staring at a stopwatch is nobody's idea of a great Tuesday.
Fartlek removes every one of those barriers. Nobody can tell you're doing a workout. You're just a woman on a run who speeds up sometimes. There's no pace to miss, no lap counter, and no one watching. And because you control every surge, it's naturally gentler on joints and confidence than jumping straight into hard repeats, which matters if you're carrying extra weight or rebuilding fitness after years away.
If you're still building your running base, work through a couch to 5k plan or a walking to running program first, then sprinkle in the lamppost game once you can comfortably run for 20 minutes. And if speed play sparks something and you want more structure later, interval training will be waiting. You'll arrive already knowing what fast feels like.
FAQ: fartlek running questions
What is fartlek training in simple terms?
Fartlek training means changing speeds during a continuous run, surging faster when you choose and jogging easy to recover, without ever stopping. The word is Swedish for speed play, and the workout is exactly as unstructured as that sounds.
Is fartlek running good for beginners?
Yes, it's arguably the best first speed workout there is. You control every surge, there are no target paces to miss, and you can scale it down to a run walk. Start with 6 to 8 short surges inside an easy 20 to 30 minute run, once a week.
How long should a fartlek workout be?
For beginners, 20 to 30 minutes including warm-up jogging is plenty. More experienced runners might play with speed for 45 to 60 minutes. Let effort guide you: finish feeling pleasantly worked, not wrecked.
What is the difference between a fartlek run and interval training?
Structure and recovery. Intervals use set distances or times with standing or walking rest, usually at target paces. A fartlek run is continuous, the surges are decided on feel, and recovery is an easy jog. Fartlek is the relaxed cousin; intervals are the precise one.