Bad running form is one of those things experienced runners can spot instantly. You see someone stride by and just know something’s off. But it’s a lot harder to judge your own form.
Without a mirror (or a coach running alongside you), it’s easy to assume you’re moving well, even if you’re leaking energy with every step.
If you’re worried your form isn’t great, don’t stress. It’s almost always fixable, and you’re definitely not alone. Even strong, seasoned runners can fall into sloppy patterns, especially when they’re tired.
And if you’re newer to running, that’s actually good news: catching issues early can save you a lot of frustration (and aches) down the road.
Everyone has their own biomechanics and natural style. Even the pros look different from one another, but there are a handful of common form mistakes that tend to waste energy and increase injury risk. The key is knowing what to look for.
What Is Proper Running Form?
The ideal running posture is stacking body systems in a straight line.1Collins, C. K., Johnson, V. S., Godwin, E. M., & Pappas, E. (2016). The reliability and validity of the Saliba Postural Classification System. Journal of Manual & Manipulative Therapy, 24(3), 174–181. https://doi.org/10.1080/10669817.2016.1138599
This means that your lower leg, thigh, pelvis, trunk, neck, and head are all stacked in a straight line, one on top of another.
It is also important for each of these ‘body systems’ to be neutrally tilted. So, for example, if you had bad running form, your hips might be tilted sideways, or your head could be tilted backward.
In other words, proper running form is when your body is aligned.
Why Is Proper Running Form Important?
Having proper running form is super important if you want to avoid injury.
Not only that, but having good running form makes you a more efficient runner. You can focus all your energy on driving forward.
How Do I Know That I Have Good (Or Bad) Form?
One of the trickiest things about running form is that you can’t really see it while you’re doing it — and what feels smooth isn’t always what you’re actually doing.
A simple way to get an honest read is to film yourself: prop your phone up and run past it a few times from the side and from behind, then watch the video back (slow motion helps a lot).
You’ll often spot patterns you’d never notice otherwise — like overstriding (foot landing way out in front), excessive bounce, hips dropping or knees collapsing inward, arms crossing your midline, a stiff upper body, or a big difference between your left and right side.
Once you can see the issue, you can start making small, targeted changes instead of guessing.
And if you’re able to, working with an experienced running coach is even better. They can assess your mechanics in real time, identify the root cause, and give you specific drills, strength work, and simple cues to clean things up without overthinking every step.
What Are The Signs Of Bad Running Form?
The following signs may indicate poor running form and should prompt you to review your technique. Here’s what to look out for.
- Neck pain while running.
- Overly fatigued quads or hips.
- Restricted breathing during easy runs.
- Elbows shooting side to side, not back and forth.
- Recurring specific muscle soreness.
- Knee or hip pain shortly after running.
- Shoulder pain while running.
If you experience any of these symptoms while running, it is worth taking the time to evaluate your form so you can work to avoid possible running injuries.
The Most Common Running Form Mistakes
There are many things to look out for regarding bad running form.
Let’s work down the list from head to toe.
Mistake #1: Craning your neck forward
If your head juts forward while you run, your neck and upper back are going to pay for it. Beyond feeling “tight,” it can create real strain over time.
One sports physio source notes that when your head sits forward of neutral alignment, it can significantly increase the load on your neck structures—roughly equivalent to adding about 5 kg of extra strain.2Neck Pain While Running – Quick Fix Guide. (2016, July 20). Sports Injury Physio. https://www.sports-injury-physio.com/post/neck-pain-while-running
Fix it: Think “stacked.” Your ears should sit over your shoulders, and your head should feel tall and balanced — not pushed forward. A helpful cue is to imagine your spine lengthening upward, like a balloon gently lifting from the back of your head. It takes practice, but it’s worth it.
Mistake #2: Looking upward
Just like craning forward, running with your chin tipped up can strain your neck, and it also changes your mechanics. Looking upward tends to shift your center of mass backward, which can encourage overstriding (we’ll get to that in Mistake #5).
Fix it: Keep your gaze neutral — look ahead, not up. A simple rule: eyes forward, chin level.
Mistake #3: Hunching your shoulders forward
Rounded, hunched shoulders often go hand-in-hand with forward head posture, especially if you sit at a desk most of the day. But it doesn’t just look tense, it can feel tense too.
When your shoulders collapse forward, your chest tightens, and breathing can feel restricted, making it harder to get deep, efficient breaths. It can also ripple down the chain: a collapsed upper body often pulls you into a forward-tilted posture that makes full hip extension harder.
Fix it: Relax your shoulders down and back, with your chest open and ribcage stacked over your hips. Think “proud but relaxed,” not stiff.
Mistake #4: Swinging your arms side-to-side
When your arms swing across your body instead of moving mostly forward and back, your torso tends to rotate to compensate. That rotation wastes energy that could be driving you forward and can make your stride feel less stable.
Fix it: Aim for a smooth, compact arm swing: elbows drive back, hands stay relatively close to your body, and arms swing mostly front-to-back (not across your midline).
Mistake #5: Overstriding
Overstriding is one of the most common efficiency-killers. When your foot lands too far out in front of your body, you’re essentially putting on the brakes every step. It increases the effort required to push off again and often leads to a heavy heel strike. It can also ramp up stress on the knees and hips.
How to spot it: Check your cadence. While there’s no perfect number for everyone, many runners fall into an efficient range around 160–190 steps per minute, depending on height, pace, and experience. If your cadence is consistently low for the pace you’re running, overstriding may be part of the picture.
Fix it: Think “shorter steps, quicker feet.” A slight increase in cadence often brings your foot strike closer under your body.
Mistake #6: Not engaging your glutes
This one is sneaky — and easy to miss. When the glutes aren’t doing their share of the work, other muscles start compensating. The result isn’t always “glute pain,” either. It can show up as hip flexor tightness, IT band irritation, knee pain, or general instability.
Fix it: “Wake up” the glutes before running with a couple minutes of activation (bridges, clamshells, band walks) and build glute strength over time with targeted exercises (hip thrusts, split squats, deadlifts, step-ups).
Mistake #7: Letting your knees collapse inward
If your knees drift inward as you run, it can throw off alignment up and down the chain — hips, knees, ankles, and feet all start compensating. Over time, this can increase the risk of issues such as plantar fasciitis, shin splints, knee pain, and lower back discomfort.
Fix it: Think “knees track forward.” A helpful cue is to keep your knees aligned over your second or third toe. Strength work for glutes/hips (especially the glute med) and single-leg stability drills can make a big difference.
Mistake #8: Running on your tiptoes
Landing way up on your toes can be useful for sprinting, but for longer distances, it often overloads the calves and Achilles and may contribute to shin issues if it’s extreme.
Fix it: Aim for a comfortable, natural midfoot-to-forefoot landing (not exaggerated), with the foot contacting the ground under your body and the ankle staying relatively stable.
Mistake #9: Pounding your feet
If your footfalls sound loud and heavy, it’s often a sign you’re overstriding or landing with too much impact. That can waste energy and increase stress on joints and tissues.
Fix it: Run “quiet.” Try to make your steps lighter and smoother — quick cadence, soft landing, and strong posture usually take care of this without forcing it.
How Do You Fix Bad Running Form?
Correcting your poor running form may seem overwhelming.
But here are a few things to keep in mind as you work on becoming a more efficient, less injury-prone runner:
- Look ahead.
- Make sure your foot lands under your center of mass.
- Keep your arms at roughly a 90-degree angle.
- Relax your hands.
- Keep your spine lengthened.
- Relax your shoulders down and back.
- Keep your arms at your sides.
- Rotate your arms from your shoulders.
- Don’t bounce up and down too much.
- Run lightly.
- Keep your cadence quick.
- Include stretching and add weights to your training plan to correct muscle imbalances and prevent injuries.
- Lean forward slightly, but don’t bend at the waist.
We’ve discussed poor running form; now let’s flip the discussion and focus on good running form.
Check out this article for form fix tips on how to make proper running form look effortless.
Most of the Mistakes identified in this article are sound advice, except #4. You and many American running coaches have been teaching arm swings wrong for decades. Swing arms back and forth, while important in sprints (including the final stretch of distance races), for most part of a long run is wrong, wasteful and increases the risk of injury.
Other than full-speed sprint, virtually no East African elite distance runners swing their arms this way, and increasingly elite American runners don’t either. Our legs are not under the center of our body and a certain amount of hip rotation is fundamental to proper running form. Smaller arm swings in front of body (but not crossing the centerline) promotes this hip motion efficiently, whereas strict back and forth swing wastes body’s natural rotational force and worse, can lead to rigid hip motion that includes overextension and/or overloading of several hip muscles which can lead to injury.
Also, emphasizing running tall may be interpreted by some runners to overdoing it. Trying to maintain unnatural upstraight posture over 20+ miles can be very tiring and easily lead to back and shoulder pain. Don’t hunch, sure, but remain relaxed not stiffened.