How to Do It
- Rest on your forearms and toes, elbows directly under your shoulders.
- Form a straight line from your head to your heels, tucking your pelvis slightly to avoid an arched lower back.
- Brace your core as if about to be punched in the stomach, and squeeze your glutes.
- Keep your neck neutral, looking at the floor a few inches ahead rather than up or down.
- Breathe normally throughout the hold instead of holding your breath.
Common Mistakes
- Letting the hips sag toward the floor, which shifts load onto the lower back instead of the core.
- Piking the hips up too high, which reduces how hard the core has to work to stabilize.
- Holding for a long time with poor form instead of a shorter hold with a hard, correct brace.
- Holding the breath, which spikes blood pressure and doesn't improve the training effect.
The plank trains your core’s most important real job: resisting movement, not creating it. A strong plank translates directly into a more stable squat, deadlift, and overhead press, since all of those lifts depend on your core bracing against the bar.
Time isn’t the goal, tension is. A perfectly braced 30-second plank trains your core harder than a sagging two-minute hold. If you can comfortably hold for over a minute with good form, add difficulty with a weight plate on your back rather than just extending the time.
Planks work well as a finisher after a full session, including the ones in our 3 day full body workout plan for beginners.
How Long to Hold a Plank, by Experience Level
There’s no single correct plank time. The right hold length depends on your training experience, and chasing a long duration with poor form trains far less than a shorter, harder brace.
| Experience level | Target hold | Focus |
|---|---|---|
| Beginner | 3-4 sets of 20-30 seconds | A hard, correct brace over duration |
| Intermediate | 3-4 sets of 30-45 seconds | Building on a solid brace |
| Advanced | 3-4 sets of 45-60 seconds, or add load | Weighted plank once bodyweight is easy |
A beginner should not chase a one-minute hold in week one. A well-braced 20-second plank trains the core harder than a sagging 60-second one, and building duration gradually is what keeps the exercise effective as it gets easier.
Muscles Worked by the Plank
The plank trains the entire core as an anti-movement unit, resisting extension of the lower back rather than creating movement the way a crunch does.
- Primary: rectus abdominis, transverse abdominis
- Secondary: obliques, erector spinae
- Stabilizers: shoulders and glutes, which keep the shoulder blades and hips from sagging or piking during the hold
Because the plank trains the core to resist movement instead of create it, it transfers directly to bracing under a barbell during the squat, deadlift, and overhead press.
Plank Alternatives
- Side plank: shifts the load onto the obliques, training lateral core stability the standard plank doesn’t emphasize.
- Dead bug: a floor-based anti-extension exercise that’s gentler on beginners still learning to brace correctly.
- Weighted plank: adds a plate across the upper back once bodyweight holds past 60 seconds stop being challenging.
- RKC plank: a shorter, maximally braced hold, popular once technique is solid and duration alone stops progressing the exercise.
If a standard forearm plank is too demanding to start, an elevated plank with your hands on a bench or counter reduces the load while teaching the same brace, and the hold length can grow gradually as your core braces harder without losing form.[1][2]
See plank alternatives for a full substitution and progression guide, organized by whether you cannot yet hold a plank or have outgrown one.
References
- Anaerobic and Muscle Endurance Development: Lifting Guidelines. National Strength and Conditioning Association (2017)Back to claim
- American College of Sports Medicine Position Stand. Resistance Training Prescription for Muscle Function, Hypertrophy, and Physical Performance in Healthy Adults: An Overview of Reviews. Medicine & Science in Sports & Exercise (2026)Back to claim
- Updating ACSM's Recommendations for Exercise Preparticipation Health Screening. Medicine & Science in Sports & Exercise (2015)
See our exercise methodology for how this evidence is applied and its limits.
Frequently Asked Questions
- How long should a beginner do a plank?
- A beginner should aim for 3 to 4 sets of 20 to 30 second holds with a hard, correct brace rather than chasing a long single hold with poor form. Time is less important than tension, so a well-braced 20-second plank trains the core more effectively than a sagging one-minute hold.
- How to do plank as a beginner?
- To do a plank as a beginner, rest on your forearms and toes with your elbows directly under your shoulders, forming a straight line from your head to your heels. Brace your core as if about to be punched in the stomach, squeeze your glutes, and breathe normally instead of holding your breath through the hold.
- Is 1 minute plank a day enough?
- A well-braced one-minute plank a day can maintain baseline core strength, but it is a modest amount of total training volume on its own. For continued progress, most people benefit more from a few sets per session, several times a week, rather than a single one-minute hold once a day.
- Do planks really flatten your stomach?
- No exercise, including the plank, spot-reduces fat from the stomach. Planks build core strength and stability, which can improve posture and how your midsection looks over time, but a flatter stomach ultimately comes from overall body fat loss through a calorie deficit, not from the plank exercise alone.
- Should a 70 year old do planks?
- Yes, most 70 year olds can safely do planks, and the exercise is valuable for maintaining core strength and stability that supports balance and everyday movement. Starting with a shorter hold, or an elevated plank on the hands against a counter or bench, is a sensible way to build up to the standard floor version.
- How do I know if I am doing the plank correctly?
- You are doing the plank correctly if your body forms a straight line from head to heels with no sagging or piking at the hips, your core stays braced hard, and you can breathe normally throughout the hold. If your lower back is aching more than your abs, your hips have likely dropped too low.