How to Do a Plank Right (Plus 8 Plank Variations)

How to do a plank: place your forearms on the floor with elbows under your shoulders, step your feet back, and hold your body in one straight line from head to heels. Squeeze your glutes, pull your ribs down, and keep breathing. Hold only as long as your form stays solid, usually 15 to 30 seconds to start.

I’ve spent more than 20 years in fitness, and I’m a NASM-certified personal trainer and corrective exercise specialist. The plank looks like the simplest move in the gym, but most people hold it in a way that does little for their core. Here’s how to do it right, how long to hold it, and 8 plank variations to keep you progressing.

How to Do a Plank with Good Form

These steps are for the standard forearm plank. Every variation later in this guide builds on this same position.

1. Set your forearms. Kneel on a mat and place your forearms flat on the floor, elbows directly under your shoulders and hands about shoulder width apart.
2. Step your feet back. Extend one leg, then the other, with your feet about hip width apart and your weight on the balls of your feet.
3. Make one straight line. Your head, shoulders, hips and heels should line up. Look at the floor just ahead of your hands.
4. Brace. Squeeze your glutes, gently pull your ribs down toward your hips, and press your forearms into the floor so your upper back stays full.
5. Breathe and hold. Take slow, steady breaths through your nose. End the set when your hips start to drop or rise.

If you’re new, start on your knees with the same straight line from knees to head. It’s a real plank, just a shorter lever.

Plank Form Mistakes That Strain Your Back

Most plank problems come from letting the body line break. These are the fixes I give most often.

1. Sagging hips. Your lower back arches and takes the load. Squeeze your glutes harder and tuck your tailbone slightly.
2. Hips piked up. Your bottom rises and your abs switch off. Lower your hips until you see a straight line on video.
3. Shoulders sinking. Your chest drops between your shoulder blades. Push the floor away with your forearms.
4. Holding your breath. This raises tension in the wrong places. Breathe slowly the whole time, even if it means a shorter hold.
5. Neck cranked up. Looking at a screen in front of you strains your neck. Keep your gaze down and your neck long.

If your back aches after planks, stop and shorten your holds. My guide to core strengthening for lower back pain has more back-friendly options.

How Long Should You Hold a Plank?

For most women, 15 to 30 seconds per hold, repeated three to five times, is a great place to start. Once you can hold 45 to 60 seconds with perfect form, it’s time for a harder variation rather than a longer hold.

Some well known spine researchers favor short holds of around 10 seconds, repeated several times, because form stays sharp. In my experience, that approach works especially well for beginners and for anyone with a sensitive back.

There’s nothing special about a five minute plank. Past a minute or so, most people are just practicing how to hold bad form.

Forearm Plank vs High Plank

Both versions train the same core muscles, but they feel different. The forearm plank puts your body closer to the floor, so your abs usually work a little harder and your wrists get a break.

The high plank, on straight arms, asks more of your shoulders and wrists and is a bit easier on the core for many people. If your wrists are sensitive, stick with forearm planks or hold dumbbell handles to keep your wrists straight.

I like having both in a plan. Use forearm planks for longer holds and high planks as a bridge to push-ups and moving variations.

How to Breathe During a Plank

A question I hear a lot is whether you should hold your breath to stay tight. For a plank, the answer is no. You want to brace your core and still breathe.

Try this: take a breath in through your nose and let it fill your sides and lower ribs, not just your chest. Breathe out slowly through pursed lips, as if blowing through a straw, and feel your abs firm up. Keep that firmness as you take your next breath.

Plank for Beginners: Modified Plank Progression

If a floor plank feels too hard, raise your hands. Work through these levels in order and stay at each one until every hold looks clean.

Spend at least a week on each level. Move up when the last few seconds of every hold still feel controlled.

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8 Plank Variations from Easy to Harder

These plank variations train your core from different angles. Pick one or two that fit your level instead of trying them all at once.

1. Incline Plank

Place your hands on a sturdy bench, counter, or step and walk your feet back. The higher your hands, the easier the hold, which makes it ideal for beginners or anyone with sore wrists.

2. Knee Plank (Modified Plank)

Hold a forearm plank with your knees on the floor. Keep a straight line from your knees to your head, and put a folded towel under your knees for comfort.

3. High Plank

Hold the top of a push-up with your hands under your shoulders and arms straight. This version also works your shoulders, and it’s the starting position for learning how to do push-ups.

4. Side Plank

Lie on one side with your elbow under your shoulder, stack your feet, and lift your hips into a straight line. For a modified side plank, bend your bottom knee and rest it on the floor. Side planks train your obliques and the muscles on the side of your hip.

5. Bear Plank

Start on your hands and knees, tuck your toes, and lift your knees an inch off the floor. Keep your back flat. It’s short, but it lights up your deep core muscles.

6. Plank Shoulder Taps

From a high plank with feet wider than usual, lift one hand to tap the opposite shoulder, then switch. Keep your hips still, as if a glass of water were balanced on your lower back.

7. Plank with Leg Lift

From a forearm plank, lift one foot a few inches off the floor, hold for two seconds, then switch. Squeeze the glute of the lifted leg without letting your hips twist.

8. Plank Up-Downs

Move from a forearm plank to a high plank one arm at a time, then back down. Go slowly and keep your hips as steady as you can. This is the hardest move on the list, so save it for last.

Should You Plank Every Day?

You can do a short plank every day if your back, wrists and shoulders feel good. Your core recovers fairly quickly from bodyweight holds.

That said, daily planks alone won’t build a complete core. Mix them with moves that train rotation and carrying, like the ones in my guide to how to strengthen your core without sit-ups, two or three times a week. Stop if you feel sharp pain anywhere.

Benefits of Plank Exercise

The biggest benefit of the plank is a core that holds your spine steady while the rest of you moves. That’s the strength you use to carry groceries, lift a suitcase into the car, or pick up a heavy laundry basket without your lower back taking over.

Planks also train your abs without curling your spine, which many women with a sensitive back find more comfortable than crunches. They need no equipment, fit into a few minutes at home, and build the shoulder and glute endurance you’ll need for push-ups and other strength moves.

In my experience, the women who get the most from planks treat them as practice for good posture, not as a contest. Short, clean holds done often teach your body to brace well in everyday life.

Plank Muscles Worked

Planks mainly train your deep abdominal muscles (transverse abdominis), the front abs (rectus abdominis), and your obliques. Their job in a plank is to stop your spine from sagging.

Your glutes, shoulders, quads and the muscles along your spine also work hard to hold the line. That’s why a plank feels like a full body exercise when you do it right.

Your This-Week Plan

1. Day 1: Test your level. Try each rung of the progression and start at the first one where a 20 second hold feels hard but clean.
2. Day 2: Do 4 holds of 15 to 20 seconds at your level, resting 30 seconds between holds.
3. Day 3: Rest, or go for an easy walk.
4. Day 4: Repeat Day 2 and add 2 side plank holds of 10 to 15 seconds per side.
5. End of week: Film one plank from the side and check that your head, hips and heels make a straight line.

Quick Questions

More from this series: start with my exercise form guide for the other basic moves, and see how to do lunges for a lower body move that pairs well with your core work.

The Bottom Line

Learning how to do a plank right is about holding a straight, braced body while you breathe, not about chasing long times. Start at the level that lets you hold clean form, keep your holds short, and add variations as you get stronger.

I’m a certified personal trainer and nutrition coach, not a physician, and this article is for general education. If you have lower back, shoulder, or wrist pain, are pregnant or postpartum, or have another health concern, check with your doctor or a physical therapist before adding planks to your routine.