Speed Training For Runners – 7 Speed Workouts To Help You Run Faster

Speed training is how you take your running from "I can finish" to "I can finish fast." Whether you are chasing a 5K PR, trying to negative split your next half marathon, or simply want to feel stronger and more efficient on every run, structured speed work is what gets you there.

But speed training is not just "run harder." Each type of speed workout targets a different energy system and physiological adaptation. Fartleks develop aerobic flexibility. Tempo runs raise your lactate threshold. Track repeats improve your VO2max. Understanding what each workout does and when to use it is the difference between smart training and just running yourself into the ground.

Below are 7 proven speed workouts that I use with my coaching clients at every level. For each one, I explain what it is, the science behind why it works, a specific workout you can try, and how it fits into your training plan.

Before You Start Speed Training

Speed work is intensity work, and intensity demands a foundation. Before adding any of these workouts to your routine, you should meet these prerequisites:

• Consistent base: You have been running 3 to 4 times per week for at least 3 months.
• Comfortable easy runs: You can run 30+ minutes at a conversational, Zone 2 effort without stopping.
• No current injuries: Speed work amplifies existing weaknesses. If something hurts, address it first.

1. Fartlek Runs

What It Is

Fartlek is a Swedish word meaning "speed play," and that is exactly what it is: an unstructured speed workout where you vary your pace based on feel, landmarks, or random intervals. There are no set distances or rigid rest periods. You run hard to the next tree, jog easy to the mailbox, sprint to the street sign, then settle back into your normal pace.

Why It Works

Fartleks develop your ability to change pace on the fly, which is exactly what racing demands. From a physiological standpoint, the random variation between aerobic and anaerobic effort teaches your body to buffer lactate at varying intensities and recover while still moving. It also recruits a wider range of muscle fibers than steady-state running because you are constantly shifting gears.

For newer runners, fartleks are the best introduction to speed work because there is no pressure to hit exact paces. You run hard when you feel like it and back off when you need to.

Try This Workout

Phase	Detail
Warm-up	10 min easy jog
Fartlek set	During a 20 to 30 min run, alternate between 30 sec to 2 min of hard effort and 1 to 3 min of easy jogging. Let it be random. Pick landmarks, change durations, play with it.
Total hard effort	Aim for 8 to 12 min of accumulated hard running
Cool-down	10 min easy jog

2. Tempo Runs

What It Is

A tempo run is a sustained effort at your lactate threshold pace, often described as "comfortably hard." It is the fastest pace you could hold for about 45 to 60 minutes in a race. You can speak a few words, but not carry on a conversation. In heart rate terms, tempo pace falls in Zone 4 (approximately 85 to 90% of max heart rate).

Why It Works

Your lactate threshold is the intensity at which lactate accumulates in your blood faster than your body can clear it. Above this threshold, fatigue builds rapidly. Below it, you can sustain effort for a long time. Tempo runs specifically train your body to clear lactate more efficiently, which raises the pace you can sustain before fatigue sets in.

Improving your lactate threshold is one of the single most impactful things you can do for race performance at distances from 10K through the marathon. Research by exercise physiologist Jack Daniels found that consistent tempo training produces measurable threshold improvements within 4 to 6 weeks.

Try This Workout

Phase	Detail
Warm-up	10 to 15 min easy jog
Tempo effort	20 min at comfortably hard pace (Zone 4, ~85-90% MHR)
Cool-down	10 to 15 min easy jog

Progression: Start with 15 minutes of tempo effort and add 2 to 3 minutes per week, building up to 30 to 40 minutes for experienced runners. You can also break the tempo into segments (e.g., 2 x 10 min with 2 min easy jog between) if 20 minutes of sustained effort is too much initially.

3. Track Repeats (Intervals)

What It Is

Track repeats are structured intervals run at a specific pace over a measured distance, typically on a 400-meter track. Common distances are 200m, 400m, 800m, and 1600m (1 mile). Between each repeat, you take a recovery period of walking or easy jogging before starting the next one.

Why It Works

Track repeats target your VO2max, the maximum rate at which your body can consume and use oxygen. VO2max is one of the primary limiters of distance running performance. By running at or near VO2max effort (Zone 5, roughly 95 to 100% of max heart rate) for short, controlled intervals, you stimulate adaptations that increase your aerobic ceiling: greater cardiac output, improved oxygen extraction at the muscle level, and enhanced buffering of metabolic byproducts.

The recovery between repeats is what makes this possible. You accumulate more total time at VO2max intensity by breaking the effort into intervals than you could in a single sustained run at that pace.

Try These Workouts

Beginner (new to track work):

Phase	Detail
Warm-up	10 to 15 min easy jog + dynamic stretches + 2 to 3 strides
Repeats	6 x 400m at hard effort (roughly current 5K race pace)
Recovery	400m walk or easy jog between each
Cool-down	10 to 15 min easy jog

Intermediate:

Phase	Detail
Warm-up	15 min easy jog + dynamic stretches + 3 to 4 strides
Repeats	4 x 800m at hard effort (slightly faster than 5K pace)
Recovery	400m easy jog between each (approximately 2 to 3 min)
Cool-down	15 min easy jog

4. Ladder Workouts

What It Is

A ladder workout uses intervals that progressively increase in distance (climbing up the ladder) and then decrease back down. The classic example: 200m, 400m, 800m, 1600m, 800m, 400m, 200m, with recovery jogs between each. The ascending portion challenges you to sustain effort as the intervals get longer. The descending portion tests your ability to maintain speed on fatigued legs.

Why It Works

Ladders combine the benefits of short, fast intervals with longer, threshold-style efforts in a single workout. The shorter intervals at the start and end develop neuromuscular speed and running economy. The longer intervals in the middle challenge your lactate threshold and aerobic capacity. The descending portion, when you are already fatigued, develops the mental and physical ability to run fast when tired, which is exactly what racing demands in the final miles.

Try This Workout

Interval	Effort	Recovery
200m	Fast (mile race effort)	200m easy jog
400m	Hard (5K effort)	400m easy jog
800m	Comfortably hard (10K effort)	400m easy jog
1600m	Tempo (threshold effort)	400m easy jog
800m	Comfortably hard	400m easy jog
400m	Hard	400m easy jog
200m	Fast	Done

With warm-up and cool-down (10 to 15 min each), this is a 50 to 60 minute workout that covers the full spectrum of speed training in one session.

5. Hill Repeats

What It Is

Hill repeats are structured intervals run uphill at a hard effort, with a walk or easy jog back down for recovery. They are essentially speed intervals on an incline. I have a complete guide on this topic: The Beginner's Guide to Running Hill Repeats.

Why It Works

Running uphill is resistance training for runners. The incline forces your glutes, quads, hamstrings, and calves to generate significantly more power per stride than flat running. This builds sport-specific leg strength that transfers directly to speed on flat ground. The incline also naturally limits your pace, so you get the cardiovascular and muscular stimulus of a sprint with lower impact forces, which makes hill repeats one of the safest forms of speed work.

Many coaches, including the legendary Arthur Lydiard, program a 4 to 6 week block of hill repeats before transitioning to flat track work. The strength you build on hills makes every subsequent speed workout more productive.

Try This Workout

Phase	Detail
Warm-up	10 to 15 min easy jog on flat ground
Hill repeat	60 to 90 sec hard uphill effort (4 to 8% grade)
Recovery	Walk or easy jog back down
Repeats	4 to 6 (beginners), 8 to 10 (advanced)
Cool-down	10 to 15 min easy jog on flat ground

6. Strides

What It Is

Strides (also called accelerations or pickups) are short bursts of fast running lasting 20 to 30 seconds. You gradually accelerate to about 90% of your top speed, hold it briefly, then decelerate smoothly. They are not sprints. The effort should feel fast but controlled and relaxed.

Why It Works

Strides improve your neuromuscular coordination, which is the communication between your brain and your running muscles. They teach your legs to turn over faster without the fatigue of a full speed workout. Strides also improve your running cadence and running economy by reinforcing efficient, fast movement patterns.

Because strides are short with full recovery between them, they produce almost no fatigue and can be done after easy runs without impacting your recovery. This makes them one of the highest-return, lowest-cost speed exercises available.

Try This Workout

Phase	Detail
When	After an easy run, 2 to 3 times per week
Stride	20 to 30 sec: gradually accelerate to ~90% effort, hold briefly, decelerate
Recovery	60 to 90 sec easy walk between each
Reps	4 to 6 strides

7. Surges

What It Is

Surges are brief pickups in pace during an otherwise easy or moderate run. Unlike fartleks, which involve random speed variation over a full workout, surges are short (15 to 30 seconds), intentional bursts inserted at specific points during a run. You pick up the pace for a short burst, then settle back into your normal effort.

Why It Works

Surges teach your body to change pace without disrupting your rhythm, which is a critical race skill. In a road race, you need to surge around other runners, respond to a competitor's move, or power over a short hill. Practicing surges in training makes these pace changes feel automatic on race day.

Surges also recruit fast-twitch muscle fibers that do not get activated during easy running, which maintains neuromuscular speed without adding a full speed workout to your schedule.

Try This Workout

Phase	Detail
Base run	30 to 45 min at easy pace
Surges	Every 5 to 8 min, surge for 15 to 30 sec at 5K effort
Recovery	Settle immediately back to easy pace after each surge
Total surges	5 to 8 throughout the run

Surges add speed stimulus to an easy day without turning it into a hard workout. Total hard running time is only 2 to 4 minutes out of a 30 to 45 minute run.

How to Program Speed Work into Your Training

Knowing the workouts is only half the equation. Programming them correctly into your week is what produces results without overtraining.

Weekly Structure

Training Level	Speed Sessions/Week	Recommended Workouts
Beginner (3 to 6 months running)	1	Fartleks or strides after easy runs
Intermediate (6 to 12 months)	1 to 2	1 structured workout (tempo, repeats, or hills) + strides 2x/week
Advanced (1+ years consistent)	2	1 threshold workout (tempo or cruise intervals) + 1 VO2max workout (repeats or ladders) + strides 2 to 3x/week

Sample Intermediate Week

Day	Workout
Monday	Easy run (Zone 2) + 4 strides
Tuesday	Rest or cross-training
Wednesday	Speed workout (tempo, repeats, or hills)
Thursday	Easy run (Zone 2)
Friday	Rest
Saturday	Long run (Zone 2)
Sunday	Rest or easy recovery jog

Speed Work Periodization

For best results, progress through speed workout types in this order over a training cycle:

1. Weeks 1 to 4: Strides and fartleks. Introduce your body to faster running with low-risk, unstructured speed work.
2. Weeks 5 to 8: Hill repeats. Build the leg strength foundation that supports all other speed work.
3. Weeks 9 to 12: Tempo runs. Develop your lactate threshold for sustained race-pace effort.
4. Weeks 13 to 16: Track repeats and ladders. Sharpen VO2max and race-specific speed.
5. Final 2 to 3 weeks: Taper. Reduce volume, maintain some intensity with short tempo segments and strides.

This periodization moves from general to specific, which is how the body responds best. Each phase builds on the one before it. Skipping the base-building phases and jumping straight to track repeats is a common mistake that leads to injuries and plateaus.

Common Speed Training Mistakes

• Running easy days too hard. If you cannot recover between speed sessions, the problem is usually that your easy runs are too fast, not that your speed work is too hard. Easy days should feel genuinely easy. Use heart rate training to keep your easy runs honest.
• Too much speed work, not enough base. Most recreational runners would benefit from more Zone 2 mileage and less speed work, not the other way around. Build the aerobic engine first. Speed work fine-tunes it.
• Ignoring recovery between repeats. Cutting recovery short changes the training stimulus. If a workout calls for 400m recovery jogs and you only take 200m, you are turning an interval workout into a tempo workout. Follow the prescribed recovery.
• Running every repeat at max effort. Speed work is about controlled effort, not all-out sprinting. If you cannot complete the workout with consistent effort across all repeats, you are running too fast on the early ones.
• Skipping the warm-up and cool-down. A proper warm-up (10 to 15 min easy jog plus dynamic stretches) reduces injury risk and improves performance during the speed portion. A cool-down aids recovery. Together they add 20 to 30 minutes to your workout, and every minute is worth it.
• No progression plan. Randomly doing speed workouts without a progression leads to stalled results. Follow the periodization above, or work with a running coach who can program your speed work intentionally.
• Adding speed too early. If you have been running for less than 3 months, your body is still adapting to the basic demands of running. Build your base with run/walk intervals and easy mileage first. Speed work will be there when you are ready.

Frequently Asked Questions

Which speed workout should I start with?

Start with strides after your easy runs (2 to 3 times per week) and one fartlek per week. These introduce your body to faster running with minimal injury risk. After 3 to 4 weeks, you can progress to structured tempo runs or hill repeats.

How fast should I run my speed workouts?

It depends on the workout. Tempo runs should be at your lactate threshold (comfortably hard, Zone 4). Track repeats should be at your VO2max pace (hard, Zone 5). Fartleks and surges should vary. As a general rule, if you cannot complete the prescribed number of repeats at a consistent pace, you are running too fast.

Can I do speed work on a treadmill?

Yes. Treadmills are excellent for tempo runs and hill repeats because you can control pace and incline precisely. For track repeats, a treadmill works but the lag time adjusting speed makes it less ideal. Fartleks are harder to replicate on a treadmill due to their random nature.

I am training for a marathon. Do I need speed work?

Yes, but the emphasis shifts. Marathon training should prioritize tempo runs and long runs at marathon-specific effort. Track repeats have a smaller role. One tempo session per week plus strides is a solid speed component for marathon training.

How long before I see results from speed training?

Most runners notice improved leg turnover and confidence within 2 to 3 weeks. Measurable pace improvements at race distance typically show up after 6 to 8 weeks of consistent speed work paired with adequate easy running and recovery.

Should I do speed work year-round?

It depends on your training philosophy. Many coaches (myself included) use a periodized approach where speed work intensity varies throughout the year. During base-building phases, strides and fartleks are enough. During race-preparation phases, structured tempo runs and track repeats take center stage. Taking 4 to 6 weeks of easy, speed-free running after a goal race allows your body to recover and rebuild before the next training cycle.