You get into position. You straighten your legs, tighten your stomach, start the timer, and wait for the burn.
Thirty seconds later, your abs are shaking.
You probably think you nailed it.
But here’s the problem: holding a plank for longer doesn’t automatically mean you’re doing a better plank.
A plank looks ridiculously simple. There’s no dumbbell, no machine, and barely any movement. That simplicity is exactly why people often get it wrong. A few small changes in your posture can turn a good core exercise into something that mainly leaves your shoulders, lower back, or neck uncomfortable.
The good news? You don't need a complicated routine to fix it.
You just need to clean up your technique.
In this guide, we’ll break down five of the most common plank mistakes, how to correct them, and what a properly performed plank should actually feel like.
First, What Is a Plank Actually Training?
The plank is primarily an isometric core exercise, meaning your muscles work to keep your body stable rather than repeatedly moving your joints.
Your core isn't just your six-pack.
A properly performed plank challenges several muscles involved in keeping your trunk stable, including your:
- Rectus abdominis
- Transverse abdominis
- Internal and external obliques
- Glutes
- Muscles around the spine
- Shoulders and upper body stabilizers
Think of the plank less as an “ab exercise” and more as a full-body stability exercise.
Your goal isn't simply to survive the timer.
Your goal is to keep your body in a strong position while resisting the forces trying to pull you out of it.
And that's where technique matters.
Mistake 1: Letting Your Hips Sag
This is probably the most recognizable plank mistake.
You start strong.
Your body looks straight.
Then fatigue arrives.
Your hips slowly drop toward the floor while your lower back begins doing more of the work.
Suddenly, what was supposed to be a core exercise becomes an uncomfortable lower-back endurance test.
Why it happens
Usually, it's a combination of fatigue and poor body awareness.
Your core isn't maintaining enough tension, so your pelvis moves forward and your lower back arches.
How to fix it
Before starting the timer:
- Squeeze your glutes.
- Tighten your abs as if someone is about to punch you in the stomach.
- Keep your ribs controlled rather than letting them flare upward.
- Keep your pelvis in a neutral position.
- Think about maintaining one long line from your head to your heels.
A useful cue is:
“Ribs down, glutes tight, abs braced.”
And don't be afraid to end the set.
A perfect 25-second plank is more useful than a sloppy 60-second plank.
Mistake 2: Raising Your Hips Too High
Some people discover that their hips are dropping and try to fix the problem by doing the complete opposite.
They push their hips toward the ceiling.
Now their body looks more like an upside-down V than a plank.
Technically, you're still holding yourself up.
But you've changed the exercise.
Why it happens
Usually, it's a way of making the plank easier.
When your hips rise, you can reduce some of the demand on your core.
It can also happen because you're trying to protect your lower back after fatigue sets in.
How to fix it
Imagine there's a straight line running:
Head → shoulders → hips → knees → heels
You don't need to force your body perfectly flat, but avoid deliberately pushing your hips upward.
Instead, focus on keeping your entire body connected.
Try this cue:
“Push the floor away.”
This helps you stay active through your shoulders while maintaining a strong trunk position.
Mistake 3: Holding Your Breath
Here's something surprisingly common.
You get into a plank.
You brace your abs.
Then you accidentally stop breathing.
Ten seconds later, you're thinking:
Why does this feel so much harder than it should?
Because you're turning a core exercise into a breath-holding contest.
Why breathing matters
Your core muscles help stabilize your trunk while you breathe. Learning to maintain tension while breathing normally is an important part of good exercise technique.
You don't need huge dramatic breaths.
Just avoid holding your breath unnecessarily.
How to fix it
Try taking controlled breaths through the set.
Think:
Brace → breathe → maintain position.
If you find yourself unable to breathe comfortably, that's also a sign that the variation or duration may be too difficult.
Reduce the time.
Build it back up.
Mistake 4: Looking Up or Dropping Your Head
Your abs aren't the only thing working during a plank.
Your entire body is connected.
So if you're staring at the mirror in front of you with your head lifted, you're changing the position of your neck and spine.
Some people do the opposite and let their head hang completely.
Neither is ideal.
What should you do?
Keep your neck relatively neutral.
If you're doing a forearm plank, look toward the floor a short distance in front of your hands.
Don't aggressively tuck your chin into your chest.
Don't look straight ahead.
Just let your head follow the natural line of your spine.
Easy cue:
“Look at the floor, not the clock.”
And yes, watching the timer every three seconds probably isn't helping either.
Mistake 5: Chasing Time Instead of Technique
This is the big one.
Somewhere along the way, planks became a competition.
30 seconds.
60 seconds.
2 minutes.
5 minutes.
But here's the question:
What are you actually training after your technique has fallen apart?
If your hips are sagging, your shoulders are collapsing, you're holding your breath, and you're barely maintaining position, adding another minute isn't necessarily making your workout better.
Quality beats bragging rights
Instead of asking:
“How long can I hold a plank?”
Ask:
“How long can I maintain excellent form?”
That's a much better question.
For many people, several high-quality sets are more useful than trying to set an absurd personal record.
What Does a Perfect Plank Look Like?
Let's put everything together.
Start with your forearms on the floor and your elbows positioned roughly underneath your shoulders.
Extend your legs behind you.
Get onto your toes.
Then:
1. Brace your abs.
Imagine preparing for a light punch to your stomach.
2. Squeeze your glutes.
This helps maintain control of your pelvis.
3. Keep your hips controlled.
Don't let them sag and don't push them dramatically upward.
4. Keep your ribs controlled.
Avoid letting your ribcage flare excessively.
5. Keep your neck neutral.
Look toward the floor.
6. Keep breathing.
Slow, controlled breaths.
7. Stop before your form collapses.
That's your real endpoint.
How Long Should You Hold a Plank?
There's no magical number that works for everyone.
A beginner might struggle with maintaining good form for 15–20 seconds.
Someone with more training experience may comfortably hold a strong plank for considerably longer.
Instead of choosing a random target, use your technique as your guide.
Beginner
Try:
3 sets × 15–30 seconds
Rest around 30–60 seconds between sets.
Intermediate
Try:
3 sets × 30–60 seconds
Focus on maintaining the same body position from the first second to the last.
Advanced
Instead of simply adding more and more time, consider making the exercise harder.
For example:
- RKC plank
- Side plank
- Plank shoulder taps
- Long-lever plank
- Plank variations with controlled movement
The goal isn't to become a human statue.
The goal is to develop a stronger, more capable core.
What Should You Feel During a Plank?
A properly performed plank can create a strong feeling of tension throughout your:
- Abdominals
- Glutes
- Shoulders
- Upper body
- Core and trunk
You may feel your muscles shaking as fatigue develops. That's not automatically a sign that something is wrong.
But sharp pain is different from normal muscular effort.
If you experience significant pain, particularly in your lower back, shoulders, or neck, stop and reassess your technique. If pain continues, consider getting advice from a qualified healthcare or fitness professional.
Why Your Plank Might Feel Impossible
If you've been doing planks for a while and they're still brutally difficult, don't automatically assume you're weak.
Your technique might simply need work.
Other factors matter too:
You're training your core when you're already exhausted
Doing planks at the end of a brutal workout can make them feel dramatically harder.
You're trying to hold them too long
Longer isn't always better.
You're not progressing gradually
Your core, like other muscles, needs appropriate progression.
You're using the wrong variation
If a standard plank is too difficult, there's nothing wrong with making it easier.
You can start with an elevated plank and gradually progress toward the floor.
That's training intelligently—not taking the easy way out.
Plank Progression for Beginners
If you can't maintain a solid floor plank yet, don't force it.
Try this progression:
Level 1: Wall Plank
Stand facing a wall and place your hands against it.
Brace your core and maintain a straight body position.
Level 2: Elevated Plank
Place your hands or forearms on a sturdy elevated surface.
Keep your body straight and brace your core.
Level 3: Knee Plank
Perform the plank from your knees while maintaining good alignment.
Level 4: Standard Plank
Move to the traditional forearm or high plank.
Level 5: More Challenging Variations
Once your basic plank is strong, progress to more demanding variations rather than endlessly increasing the hold time.
The 30-Second Plank Test
Want to check your technique?
Try this.
Set a timer for 30 seconds.
Get into your normal plank position.
Now ask yourself:
At 10 seconds:
Are my hips still controlled?
At 20 seconds:
Am I still breathing normally?
At 25 seconds:
Are my shoulders and neck relaxed enough to maintain position?
At 30 seconds:
Does my body still look roughly the same as it did at the beginning?
If the answer is no, don't worry.
You've just found exactly what you need to improve.
5 Quick Fixes to Remember
Before your next plank, remember these five things:
1. Don't let your hips sag.
Brace your core and squeeze your glutes.
2. Don't hike your hips.
Maintain a controlled, straight body position.
3. Don't hold your breath.
Keep breathing while maintaining abdominal tension.
4. Don't crane your neck.
Keep your head and neck neutral.
5. Don't chase the clock.
End the set when good form disappears.
That's it.
Five simple corrections can completely change the quality of your plank.
The Bottom Line
The plank isn't complicated.
But simple doesn't mean easy—and it definitely doesn't mean impossible to do incorrectly.
You don't need to hold a plank for five minutes to prove you're fit.
You don't need to shake through terrible form just to beat yesterday's time.
And you certainly don't need to copy whatever the person next to you is doing at the gym.
Build your plank around control, tension, breathing, and consistency.
Start with the version you can perform well.
Hold it for a manageable amount of time.
Rest.
Repeat.
Then gradually make it harder.
Because when it comes to the plank, the goal isn't simply to stay up.
The goal is to stay strong while you're up.
Frequently Asked Questions
Is doing a plank every day good?
For many healthy people, planks can be included regularly, but you don't necessarily need to perform them every day. Your overall training program, recovery, and goals matter more than doing one exercise daily.
Why do my hips hurt during a plank?
Hip discomfort can come from positioning, fatigue, or other factors. Check whether you're excessively raising or dropping your hips and make sure you're properly bracing your core. If you experience persistent or significant pain, stop the exercise and seek professional guidance.
Should I do planks before or after a workout?
It depends on your goal. If core strength is a major priority, you may perform them earlier in your workout while you're fresh. If they're simply an accessory exercise, they can also fit near the end of your session.
Are planks better than crunches?
They're different exercises rather than one being universally “better.” Planks emphasize resisting movement and maintaining trunk stability, while crunches involve repeated spinal flexion. A well-designed program can use different core exercises.
Can planks give you six-pack abs?
Planks can strengthen your abdominal muscles, but visible abs depend heavily on overall body composition, genetics, nutrition, and training. Doing endless planks alone isn't a guaranteed way to reveal a six-pack.
Why do I shake while doing planks?
Muscle shaking can happen as your muscles become fatigued and work to maintain the position. If the shaking comes with pain, dizziness, or other concerning symptoms, stop the exercise.
How many planks should I do a day?
There's no universal number. Start with a few quality sets that you can perform with good technique and gradually progress based on your fitness level.