You log the miles. You nail the intervals. But your pace plateaus and your knees complain after every long run. The missing piece isn't more running. It's strength. Heavy strength training two times per week improves running economy by 2–8% in trained runners and cuts injury risk roughly in half. Five exercises, done consistently, change how efficiently you run.
Here's the thing
Most runners treat strength training as optional. The research says otherwise. Lifting heavy (≥80% of your one-rep max) improves the stiffness and power of tendons and muscles, which directly translates into better force transfer with every stride. You use less oxygen to run the same pace. You absorb impact better. You get hurt less. Two sessions per week is sufficient, more does not produce additional gains for runners.
Here's what to do: the 5 exercises
1) Single-leg press
Why: Simulates single-leg loading in running. Builds quad and glute strength through the push-off phase.
How:
- Set the leg press machine at a challenging weight (≥80% 1RM feel)
- 3 sets × 4–6 reps per leg
- Press through the full range, don't lock the knee at the top
- Lower slowly (3 seconds down), press deliberately
Common mistake: Using both legs and reducing load. Single-leg work exposes asymmetries and forces real strength.
2) Romanian deadlift
Why: Targets the hamstrings and glutes through their lengthening phase — exactly how they work when your foot strikes the ground and you pull your leg through.
How:
- Hold a barbell or dumbbells at hip width
- Hinge at the hips, keeping a neutral spine
- Lower until you feel a deep hamstring stretch (mid-shin or lower)
- Drive hips forward to return, do not round the lower back
- 3 sets × 5–6 reps, heavy
Common mistake: Squatting the weight down. This is a hip hinge, not a squat. Maintain soft knees throughout.
3) Hip thrust
Why: Directly trains glute max strength through peak hip extension — the moment of maximum power output in each running stride.
How:
- Upper back on a bench, barbell across hips
- Drive hips up until your body forms a straight line from knees to shoulders
- Squeeze glutes hard at the top for 1 second
- Lower under control
- 3 sets × 5–8 reps, heavy
Common mistake: Hyperextending the lower back at the top. Posterior pelvic tilt at peak — think about tucking your pelvis.
4) Calf raise (single-leg, weighted)
Why: The calf-Achilles complex stores and releases elastic energy with every footstrike. Heavy calf training increases tendon stiffness, which improves running economy independently of other strength gains.
How:
- Stand on the edge of a step, hold a dumbbell in one hand for balance
- Lower heel fully (full range is critical, not a partial pump)
- Rise as high as possible onto the ball of the foot
- 3 sets × 8–10 reps per leg
- Add weight progressively, bodyweight becomes easy quickly
Common mistake: Fast, partial reps. Full range and a 2-second pause at the bottom loads the tendon properly.
5) Step-up with knee drive
Why: Combines hip extension power with single-leg balance and knee drive — the pattern repeated thousands of times per run.
How:
- Use a box or step 40–50 cm high
- Hold dumbbells at your sides
- Step up, drive the opposite knee up to hip height at the top
- Step down with control, don't drop
- 3 sets × 6–8 reps per leg, weighted
Common mistake: Using the back leg to push off. All power should come from the working leg stepping up.
The protocol: how to programme these
Frequency: 2× per week (e.g., Monday and Thursday)
Session structure:
- Warm-up: 5 minutes easy bike or jog + dynamic leg swings
- Single-leg press: 3 × 4–6 reps per leg
- Romanian deadlift: 3 × 5–6 reps
- Hip thrust: 3 × 5–8 reps
- Single-leg calf raise: 3 × 8–10 reps per leg
- Step-up with knee drive: 3 × 6–8 reps per leg
- Cool-down: 5 minutes light stretching
Total time: 35–45 minutes
Timing relative to running: Separate sessions from hard interval days by at least 24 hours. Strength after easy runs (same day) is fine.
Load progression: Add weight when you can complete all reps with good form. Don't chase reps — keep loads in the 80%+ range. Once 6 reps feel easy, add weight.
Add plyometrics after week 6
Once you have a strength base, box jumps and single-leg bounding amplify the elastic energy benefits:
- Box jump: 3 × 5 reps, focus on landing softly, not jumping high
- Single-leg bound: 3 × 8 per leg, drive off one foot, stick the landing on the same foot
- Add these at the start of your strength session before lifting, when the nervous system is fresh
3 common mistakes to avoid
❌ Mistake 1: Using light weight and high reps.
✅ Fix: The running economy improvements come from heavy loading (≥80% 1RM). 3 × 12 with an easy dumbbell won't change your tendons or neuromuscular patterns meaningfully.
❌ Mistake 2: Treating strength as extra, doing it only when you have time.
✅ Fix: Schedule strength sessions like long runs. Two fixed days per week, non-negotiable. The consistency over 8–12 weeks is what produces measurable running economy gains.
❌ Mistake 3: Stopping strength work during race season.
✅ Fix: Reduce to 1× per week to maintain gains, but don't drop it entirely. Strength losses reverse faster than they're built.
Why it works
Heavy lifting changes tendons, not just muscles
Bohm et al. (2015) reviewed the mechanisms behind strength training and running economy. Heavy resistance training (≥80% 1RM) increases tendon stiffness, the tendon acts like a spring, storing energy during ground contact and releasing it at push-off. Stiffer tendons return more of that energy. The result is better running economy without extra cardiovascular effort.
Application: The exercises above are selected for their direct biomechanical overlap with running. Each one loads the hip extensors, knee stabilisers, or ankle plantarflexors in patterns that transfer to stride mechanics.
Two sessions per week is the sweet spot
Balsalobre-Fernández et al. (2016) meta-analysed 14 randomised controlled trials on concurrent training (running + strength) in endurance athletes. Studies using 2–3 strength sessions per week improved running economy by 2–8% and reduced injury rates. More sessions showed diminishing returns and increased fatigue interference with running training.
Why this matters: Runners often avoid strength training because they fear it will compromise running volume. At 2× per week, the opposite is true — it protects running capacity by reducing injury risk.
The gains take 6–10 weeks
Most studies in the meta-analysis ran 8–12 weeks before measuring significant effects. Tendon adaptations are slower than muscular adaptations, which is why consistency over weeks matters more than loading any single session.
Application: Don't judge the protocol at week 2. The improvements compound. Stick to it through a full 10–12 week block before assessing.
Plyometrics add a separate elastic energy component
Ramirez-Campillo et al. (2021) reviewed plyometric training in endurance runners. Adding 2–3 plyometric exercises (box jumps, bounds) to a strength programme improved running economy beyond strength alone, particularly at faster race paces where elastic return matters more.
Application: After 6 weeks of the base protocol, add box jumps and single-leg bounds at the start of each strength session. Keep volume low (3 × 5 reps) — plyometrics are about quality of force application, not fatigue.
Key takeaway
Strength training for runners isn't about looking stronger. It's about running more efficiently and staying healthy long enough to accumulate real training. Two sessions per week with these five exercises, loaded progressively over 10–12 weeks, will improve your running economy, reduce your injury risk, and make your easy runs feel easier.
The fastest runners in the world lift. So do the most durable ones. This is why.
Disclaimer: This article provides general information about strength training for runners based on current research. It is not medical advice. Consult with a qualified healthcare professional before starting new training programmes.
About this article
This article is part of Healthy Insight's evidence-based training library.
Questions or corrections? Email [email protected].
Last updated: Jun 2, 2026.