Jumping Lunge Form Check
Wondering if your jumping lunge is solid? Prop up your phone — GOODREPS watches your knee angle (hip → knee → ankle) live and scores every rep while you train your quads and glutes, with hamstrings and calves assisting. Free in your browser today; coming to Google Play and the App Store.
Coming to Google Play & the App Store▶ Try The Form Check
LIVEHOW TO DO A PROPER JUMPING LUNGE
Setup Start in a lunge, side-on to the camera.
- Jump up explosively and switch legs mid-air.
- Land softly in a lunge on the opposite side.
- Keep your torso upright throughout.
Same sheet as the ⓘ panel in the app — animated demo included.
THREE STEPS TO A SCORED JUMPING LUNGE
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 knee angle (hip → knee → ankle) on-device — no wearables. Bodyweight and stable flooring — start slow before you add height.
Move — and watch the form bar
The bar fills from ~160° toward ~95° at the bottom. Cut range short and it tells you; full ROM is what counts.
WHAT THE CAMERA WATCHES
- Alternating split stance with a clear switch in the air.
- Front knee tracking as you land and sink.
- Upright chest through the bounce.
COMMON JUMPING LUNGE MISTAKES
Feet landing on a tightrope
Keep a hip-width track so you do not wobble sideways every switch.
Front knee collapsing inward
Land with the knee over the mid-foot, then sink with control.
Cutting depth to stay fast
Speed is fine; missing depth is not. Sink until the back knee softens toward the floor.
Looking down and tipping forward
Eyes forward, ribs stacked. A forward tip makes landings ugly.
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 any equipment to check my jumping lunge form?
Just your phone for most variations. Add free weights when the pattern is clean — the app still scores the movement either way.
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.