Plank Rotation
Also known as: forearm plank rotation
- Primary muscleAbs
- EquipmentBodyweight
- DifficultyIntermediate
- TypeCore · Core stability
- Secondary muscles
- Obliques, Delts
- Body part
- Core
- Position
- Prone
- Laterality
- Bilateral (both sides together)
- Category
- Strength
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Rotating from a plank into a side support, top arm reaching toward the ceiling, strings the two hardest static holds together with a controlled transition between them. The turn itself, when all your weight passes over one arm, is where most reps fall apart, so earn it slowly rather than swinging the arm for momentum.
How to do the Plank Rotation
- Start in a high plank position with your hands directly under your shoulders and your body in a straight line from head to toe.
- Engage your core and glutes to maintain a stable position.
- Rotate your torso to the right, lifting your right arm and extending it towards the ceiling.
- Keep your hips and legs stable as you twist.
- Hold for a moment, then return to the starting position.
- Repeat the twist on the left side.
- Continue alternating sides for the desired number of repetitions.
Tip: Pull the elbows toward the toes and the toes toward the elbows without moving either to fire the whole core.
Muscles worked
Primary
Abs · Core
The abs resist the hips from sagging and should feel like they are tightening more with every exhale.
Secondary
- Obliques — On side planks and rotations the obliques on the bottom side hold the hips up and should burn along the side of the waist.
- Delts — The shoulders hold the upper body up and get more work on shoulder tap variations.
Common mistakes
- Hips sagging — squeeze the glutes and tuck the pelvis slightly so the lower back stays flat; a plank with an arched back trains nothing useful.
- Hips too high — the body should be a straight line from head to heels, so check in a mirror or have someone lay a bar along your back.
- Time over tension — a two minute plank with a loose core is worse than 30 seconds with everything braced; shorten the hold and squeeze harder.
- Holding the breath — breathe normally through the hold and keep the abs braced through each exhale.
Sets, reps and where it fits
| Goal | Sets × reps | Rest |
|---|---|---|
| Strength | 3 × 8–12 | 60 s |
| Endurance | 2–3 × 15–25 | 45 s |
Planks go at the end of a session or in the warm-up to switch the core on before squats and deadlifts. Superset a front plank with a side plank each way.
Variations and alternatives
Similar exercises
Without bodyweight
Frequently asked questions
What muscles does the Plank Rotation work?
The Plank Rotation primarily works the abs. It also involves the obliques and delts, which assist the movement and stabilise the joints.
Is the Plank Rotation good for beginners?
It is rated intermediate, so it suits people who already train regularly. Beginners can still do the Plank Rotation with light load and a spotter or coach watching the first few sessions; if it feels awkward, pick an easier variation from the alternatives below first.
What can I do instead of the Plank Rotation?
If you cannot do the Plank Rotation, try the Bench Incline Side Plank, the Weighted Plank or the Bird Dog Plank. Each of them trains the abs through a similar movement, so you can swap them in without changing the rest of the workout.
How many sets and reps should I do?
It depends on your goal. For the Plank Rotation, a sensible starting point is strength: 3 × 8–12 with 60 s rest; endurance: 2–3 × 15–25 with 45 s rest. Train it at the end of a session or pair it with a lower-body lift as active rest.
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