Strength Training for Runners: What Actually Helps

Strength training for runners has a different goal from a classic muscle-building plan.

You are not trying to collect as many leg exercises as possible. You are trying to build more strength and elastic capacity without wrecking the quality of your running.

And that is where the evidence has become genuinely interesting: heavy strength training in particular, and combinations with plyometric work, can improve running economy and running performance.

Why strength training makes runners faster

Running economy: the underrated factor

Running economy describes, in simple terms, how much energy — or oxygen — you need at a given running speed.

Two runners can have the same VO₂max and still run at different speeds, because one uses less energy at the same pace.

A 2024 meta-analysis found small improvements in running economy from high-intensity strength training and moderate improvements from combined strength methods. Plyometric training also showed benefits in certain speed ranges.

That is the more important statement than a blanket figure like “strength training always improves RE by 2–8%”: the effect depends on the training method, the running speed and the athlete.

Possible mechanisms are:

1. More maximal strength. If each stride only takes a smaller share of the force available to you, the same running speed can become more economical.
2. Better neuromuscular coordination. Strength work and plyometrics change how fast and how efficiently force is produced.
3. Adaptations in the muscle-tendon system. More favourable storage and return of elastic energy can support running economy.

Strength training does not replace running here. It improves the “hardware” you use to put your existing endurance capacity onto the ground.

Injury prevention

This deserves more caution than it gets in most fitness articles.

Strength training can make muscles, tendons and bone more robust, and it is an important part of rehabilitation and load-building for many running-related complaints.

It does not follow automatically that a general strength program reliably prevents running injuries.

A 2024 systematic review with meta-analysis found no significant reduction in injury risk or injury rate overall from exercise-based prevention programs in endurance runners. In a post-hoc analysis, supervised programs did better, but the quality of the evidence was limited overall.

So the clean formulation is:

Strength training improves performance factors and robustness. As a blanket guarantee against running injuries, the evidence is considerably weaker.

Injuries also depend on how training is managed, on jumps in load, on sleep, on previous injuries and on individual tissue tolerance.

What the research shows

The most important findings

Current systematic reviews in middle- and long-distance runners show a fairly consistent pattern:

• Running economy: can improve through heavy strength training and combined methods
• Running performance: time-trial and time-to-exhaustion performance can benefit
• VO₂max: usually changes little from added strength training
• Plyometrics: can be a useful addition, especially combined with strength work
• Very light strength training: shows less consistent benefits for running economy than high loads do

A 2024 meta-analysis found a moderate effect of high-intensity strength training on running performance. Programs combining several strength methods showed even larger effects — although the certainty of the evidence ranged only from very low to moderate depending on the outcome.

Which is an important difference from the typical social media line, “3×5 makes you faster”.

The direction is well supported. The perfect training formula is not.

Concurrent training works

Running and strength training in the same training block is called concurrent training. The much-invoked interference effect is real, but far smaller and more specific than its reputation suggests.

An updated meta-analysis found:

• Maximal strength: on average not meaningfully impaired
• Muscle hypertrophy: at whole-muscle level, not meaningfully impaired
• Explosive strength: can be blunted somewhat more, especially when endurance and strength work sit in the same session

For runners that means you do not have to separate strength and endurance work artificially and completely.

What matters more is that your highest-priority sessions happen at good quality.

2×/week is enough

Many successful study protocols land at roughly two strength sessions per week, especially in build phases. That is a very good starting point in practice.

More is not automatically better. A runner doing five or six runs has a limited recovery budget, and strength training is supposed to support the running rather than become a second main sport.

A workable pattern:

• build phase: often 2 strength sessions per week
• very run-heavy phase: reduce volume
• competition phase: keep enough strength work to maintain adaptations, but minimise fatigue

The exact minimum dose depends on what was built beforehand and how hard the remaining sets are.

The optimal strength training for runners

Principle 1: heavy, not light

For running economy, programs with high loads come out particularly well in current meta-analyses. The definition used there was frequently ≥80% of 1RM.

That does not mean every exercise for runners has to be trained as a three-rep max.

A workable main range for the big strength lifts is, for example:

• 3–6 reps
• 2–4 working sets
• rest long enough that the sets genuinely stay strength-oriented

On accessory work such as calf raises or split squats, the reps can sit higher.

The point is not that “low reps are magic”.

The point is: if the goal is extra maximal strength, at least part of the training has to actually be heavy enough to develop maximal strength.

Principle 2: unilateral is king

Single-leg exercises suit runners well, because they load each side separately and allow high force demands with a relatively moderate external load.

Examples:

• Bulgarian split squats
• step-ups
• single-leg RDLs
• single-leg calf raises

Even so, “unilateral is king” is a practical heuristic rather than a law of nature.

Bilateral lifts like squats and trap bar deadlifts can build maximal strength very efficiently. A good session for runners does not have to try to imitate the running stride in the weight room.

Specificity here does not mean: the exercise has to look like running.

It means the exercise has to improve a physical quality that is useful for running.

Principle 3: plyometrics as an addition

Jump training can improve your ability to develop force and use elastic energy within a very short ground contact time.

Suitable examples:

• pogos or simple jump series
• box jumps
• bounding
• drop jumps for more experienced athletes

Plyometrics should be built up progressively, just like strength work. More jumps are not automatically better, and fatigued “explosive jumps” lose exactly the quality they are supposed to train.

The exercise selection

One possible selection:

You do not need all six exercises in every session.

For many runners, less is better: one heavy main lift, one single-leg addition, calves and a small block of plyometrics already deliver a lot of training value.

An example training week

For a runner covering 40-50 km a week

One possible week:

This is only a template. Another runner might stack the strength session on the same day as a hard run in order to keep the genuinely easy days free.

What decides it is not the day of the week but the question: do the important runs and the heavy strength sets stay good in quality?

Strength session A

Strength session B

The volume is deliberately modest. Runners do not need a “leg day” feeling to benefit from strength training.

Common mistakes

1. Training too light

Problem: the strength training consists only of high reps with very small loads, even though the goal is extra maximal strength and better running economy.

Fix: train at least one or two big movements per week in a genuinely strength-oriented way. High loads are the most consistently effective approach in the current meta-analyses on runners.

Lighter accessory work can still have its place.

2. Leg press instead of free weights

The leg press is not automatically a bad exercise for runners.

The only problematic idea would be that an exercise is useless because it stabilises you. If the leg press lets you build high leg strength at low technical cost, it can be very worthwhile.

Free-weight and single-leg exercises have other advantages and are often practical. But the muscle does not know whether the machine looks “functional”.

Fix: choose exercises by training goal, tolerance and fatigue — not by a blanket ban on machines.

3. Strength training on the same day as hard runs

This is not automatically a mistake.

Two hard stimuli on the same day can interfere with each other if they sit back to back and both demand maximal quality. At the same time, stacking loads can make sense so that other days stay genuinely easy.

If both sessions matter:

• separate them by several hours where your day allows it
• do the higher-priority session first
• keep the strength volume small if the run was already very demanding

Concurrent training research mainly shows more trouble with explosive strength when endurance and strength are combined directly within the same session.

4. Ignoring the upper body

The biggest performance lever for runners is in the lower body. Even so, there is little reason to cut the upper body entirely.

A few sets of rows, pull-ups, push-ups or pressing cost little time and maintain upper-body strength and muscle mass.

Fix: no separate bodybuilding day required. Two short upper-body supersets a week are plenty for many runners.

Tracking strength training as a runner

In running, load is relatively visible: kilometres, pace, time, heart rate.

In strength training, a second data universe of sets, reps and weights appears very quickly.

The muscle heatmap in hitPR can show you which muscle groups actually received training sets across your strength sessions. With short runner programs in particular, that is useful: a plan can look very quad-dominant even though calves or the posterior chain barely get direct work.

More important than perfect muscle counting, though, is how the main lifts develop.

If 3 × 5 split squats with 20 kg turn into 3 × 5 with 30 kg after a few weeks and your running quality stays stable, the strength training is doing its job.

Conclusion

Strength training can make runners more capable — above all through more maximal strength, better running economy and complementary plyometric adaptations.

The current evidence particularly supports:

• heavy strength work as a fixed component
• moderate total volumes rather than bodybuilding leg marathons
• plyometrics as an optional addition
• planning in which the important runs still come first

One statement I would deliberately no longer make: strength training halves your running injury risk across the board. The running-specific prevention evidence is not strong enough for that at the moment.

The practical aim is simpler:

Get stronger in the weight room without generating so much fatigue there that your actual running suffers for it.

Sources

• Llanos-Lagos C, Ramirez-Campillo R, Moran J, Sáez de Villarreal E (2024). Effect of Strength Training Programs in Middle- and Long-Distance Runners’ Economy at Different Running Speeds: A Systematic Review with Meta-analysis. Sports Medicine, 54(4):895–932.
• Llanos-Lagos C, Ramirez-Campillo R, Moran J et al. (2024). The Effect of Strength Training Methods on Middle-Distance and Long-Distance Runners’ Athletic Performance: A Systematic Review with Meta-analysis. Sports Medicine, 54:1801–1833.
• Blagrove RC, Howatson G, Hayes PR (2018). Effects of Strength Training on the Physiological Determinants of Middle- and Long-Distance Running Performance: A Systematic Review. Sports Medicine, 48(5):1117–1149.
• Schumann M, Feuerbacher JF, Sünkeler M et al. (2022). Compatibility of Concurrent Aerobic and Strength Training for Skeletal Muscle Size and Function: An Updated Systematic Review and Meta-Analysis. Sports Medicine, 52(3):601–612.
• Wu H, Brooke-Wavell K, Fong DTP, Paquette MR, Blagrove RC (2024). Do Exercise-Based Prevention Programs Reduce Injury in Endurance Runners? A Systematic Review and Meta-Analysis. Sports Medicine, 54:1249–1268.