Core Training for Runners
Runners don't need endless crunches. They need a core that resists rotation, keeps the pelvis steady and holds form when tired. Here's a routine built for that.
Core training for runners should focus on control rather than crunches: resisting rotation, keeping your pelvis level on one leg, and holding your trunk steady as you fatigue. Two short sessions of 15-20 minutes per week, built around exercises like dead bugs, side planks, Pallof presses, single-leg work and carries, is enough for most runners. A strong core won't make you fast on its own, but it can help you hold good form late in runs and make the rest of your strength training more effective.
Why runners need a strong core
Running is a series of single-leg landings. Every stride, one leg absorbs your bodyweight while your arms and opposite leg swing. Your core's job is to:
- Resist rotation from your arm and leg swing so energy goes forward, not sideways
- Keep your pelvis level so your hip doesn't drop excessively on each landing
- Hold your trunk upright rather than collapsing forward as you tire
- Transfer force between your upper and lower body
That's mostly about stability and endurance, not about curling your spine. Which is why a runner's core routine looks different from a bodybuilder's.
Many runners also report that their form deteriorates late in long runs or races. Core and hip strength aren't the only factors, but they're commonly part of the picture.
What the evidence and coaching consensus say
The general view among coaches and sports scientists is that strength training, including core and hip work, is a useful complement to running for most people. It's commonly associated with better running economy and may help resilience to some overuse problems, though the exact effect of core training alone is less clear than for overall strength training. The practical takeaway: do it, keep it short and focused, and don't expect it to replace running itself.
The best core exercises for runners
| Exercise | What it trains | Why runners benefit |
|---|---|---|
| Dead bug | Anti-extension with alternating limbs | Mimics opposite arm-leg coordination |
| Side plank | Anti-lateral flexion | Supports a level pelvis |
| Pallof press | Anti-rotation | Resists the twist from arm swing |
| Single-leg glute bridge | Hip extension and pelvic control | Strengthens the stance-leg hip |
| Bird dog | Anti-rotation, back extensor endurance | Cross-body stability |
| Suitcase carry | Anti-lateral flexion while walking | Trunk control during locomotion |
| Copenhagen plank (short lever) | Adductors and lateral core | Inner thigh and hip stability |
| Plank with leg lift | Anti-extension, hip control | Trunk stiffness with leg movement |
You'll notice crunches aren't on the list. They're not harmful, but they train spinal flexion, which isn't what running asks of your core most.
A 20-minute core routine for runners
Do this twice a week on easy days or after a short run. Rest 30-45 seconds between sets.
- Dead bug: 3 sets x 8 reps per side, slow
- Side plank: 3 sets x 30-40 seconds per side
- Pallof press: 3 sets x 10 reps per side with a 2-second hold
- Single-leg glute bridge: 3 sets x 10 reps per side
- Suitcase carry: 3 sets x 30-40 meters per side
- Bird dog: 2 sets x 8 reps per side with a 2-second pause
No gym? Swap the Pallof press for plank shoulder taps and the suitcase carry for a single-arm farmer's hold with a loaded backpack. The ab workout generator can also build an equipment-free version.
How to progress over a training block
| Weeks | Focus | Changes |
|---|---|---|
| 1-3 | Learn positions | Bodyweight, slow tempo, form first |
| 4-6 | Build endurance | Longer holds (up to 45-60 seconds), more reps |
| 7-9 | Add load or difficulty | Heavier carries, band or cable resistance, longer levers |
| Race weeks | Maintain | One short session, cut volume roughly in half |
For a deeper dive into making core work harder over time, see progressive overload for abs.
When to schedule core work
- Best: after easy runs or on non-running days.
- Okay: short activation (a few dead bugs and side planks) as part of your warm-up.
- Avoid: hard core sessions right before long runs, tempo runs or races. A fatigued core is the opposite of what you want for a quality session.
A sample week for someone running four days:
| Day | Running | Strength |
|---|---|---|
| Monday | Rest | Lower body strength + core routine |
| Tuesday | Intervals | None |
| Wednesday | Easy run | Core routine |
| Thursday | Rest or cross-training | Upper body or mobility |
| Friday | Tempo run | None |
| Saturday | Easy run | Short core activation |
| Sunday | Long run | None |
Runners and visible abs
Plenty of runners are lean but don't have particularly visible abs, and some heavy-mileage runners have very defined midsections. Visibility depends on body fat and how developed your abs are. Running burns a lot of energy, but appetite often rises to match, and endurance athletes need enough fuel to train and recover well.
If you want visible abs as a runner, be careful about combining a calorie deficit with high mileage. Underfueling can hurt performance, recovery and health. A modest deficit during lower-mileage phases is usually safer than cutting hard in peak training. Our guides on cardio for abs and calorie deficit for abs cover the fat-loss side, and the calories burned calculator gives a rough idea of your run's energy cost. If you notice frequent injuries, missed periods, persistent fatigue or stress around food, talk to a doctor.
Core and running injuries
Core work is often included in programs for runners with niggles like hip, knee or lower back discomfort, but it isn't a cure-all and pain has many causes. If something hurts during or after runs, see a physical therapist or sports medicine doctor rather than just adding more planks. Our article on core and lower back pain covers general principles.
Where AbShred fits
AbShred is an upcoming iPhone app that scores six ab zones from one photo, including Deep Core and Symmetry, and builds a weekly ab plan starting with your weakest zone, with exercise demos. For runners who also care about how their abs look, it's a way to track trends. It's an AI estimate for motivation, not a medical measurement. Join the waitlist at abshred.com.
FAQ
How often should runners do core training?
Two sessions of 15-20 minutes a week works well for most runners. A short activation routine before runs is a nice extra but not essential.
Do runners need to do crunches?
They're optional. Anti-rotation, anti-lateral-flexion and single-leg stability exercises transfer better to running. A few crunches won't hurt if you enjoy them.
Will core training make me run faster?
On its own, probably only a little. As part of an overall strength program, it can help you maintain form and run more economically, especially when you're tired.
Should I do core before or after a run?
After an easy run or on a separate day is best. Save hard core work for days without demanding runs.
Does running give you abs?
Running can help you lose body fat, which helps reveal your abs, but it doesn't build much ab muscle. Pair running with core training and sensible nutrition.