Copenhagen Plank Alignment Check
Wondering if your copenhagen plank is aligned? Prop up your phone — GOODREPS watches your hip angle (shoulder → hip → ankle) live and times the hold only while your form is right, as you work your obliques, with glutes and core assisting. Free in your browser today; coming to Google Play and the App Store.
Coming to Google Play & the App Store▶ Try The Alignment Check
LIVEHOW TO HOLD A PROPER COPENHAGEN PLANK
Setup Side plank with your top leg resting on a bench, side-on to the camera.
- Lift your hips so your body forms a straight line.
- Drive the top inner thigh into the bench.
- Hold; keep your hips from dropping.
Same sheet as the ⓘ panel in the app — animated demo included.
THREE STEPS TO A SCORED HOLD
Prop your phone and get in frame
Phone at roughly torso height, set up side-on to the camera. A quick camera test checks lighting, distance, and angle before you start.
The camera locks a 17-point skeleton on you
GOODREPS measures your hip angle (shoulder → hip → ankle) against the pose target (~170°) on-device — no wearables. A bench for the top leg — side plank with adductor demand.
Settle in — the timer only counts real alignment
The hold timer runs while you’re in the pose. Drift out and it pauses (doesn’t reset) until you find the shape again.
WHAT THE CAMERA WATCHES
- Hips lifted in a side line while the top foot/inner thigh owns the bench.
- The hold timer — sags when hips drop or you twist open.
- Stacked shoulder over the base elbow/hand.
COMMON COPENHAGEN PLANK MISTAKES
Letting hips dump early
This one burns fast. Short honest holds beat long saggy ones.
Bench too high or slippery
Stable surface only. If the bench moves, the set is over.
Rotating chest down
Stay sideways. Chest toward the floor is a different plank.
Holding your breath
Breathe. Adductors and airways can coexist.
PRIVATE BY DESIGN
Pose detection runs in your browser via TensorFlow.js. Camera frames are analyzed in real time and immediately discarded — nothing is recorded, nothing leaves your phone, and we never see them. Sign-in is optional; skip it and everything stays local.
QUESTIONS, ANSWERED
Do I need gear for copenhagen plank?
Usually just floor space (and whatever the hold requires — bar, wall, or bench). Your phone camera does the coaching.
Does it work in a home gym or low light?
Run the built-in camera test first — it checks your lighting, distance, and angle with live green checks before you start. If a rep still slips through, manual counting is always one tap away.
Is my camera feed uploaded anywhere?
No. Pose detection runs entirely on your phone, in your browser. Frames are analyzed in real time and immediately discarded — nothing is recorded, nothing is uploaded.
RELATED GUIDES
Free forever — camera counting for all 60 exercises, no account needed. Pro (voice coaching, programs, depth-camera form checks) is $7/mo, $49/yr, or $99 once. No ads, ever.