⚡ Pose Detection
⭐ Gymnastics
SCALE IT 5000 ⭐
A webcam-based gymnastics scale assessment tool that uses pose detection to evaluate a student’s arabesque balance in real time. Students stand on one leg and lift the other behind them while the tool checks four key form elements continuously. A live hold timer counts every second they maintain correct form — with difficulty levels so the same tool works for beginners and more advanced students alike.
How to Use
- 💻 Open SCALE IT 5000 on a laptop or tablet
- 📷 Allow webcam access when prompted
- 🟢 Wait for POSE ONLINE to appear in the header
- 🎚 Pick a difficulty: EASY 2s, MED 4s, or HARD 6s
- 👟 Student stands facing the camera on two feet to start
- ▶️ Press READY to start the countdown
- ⭐ On GO! student lifts one leg behind into scale
- ⏱ Hold timer counts up while all four checks are good
- 🌟 Screen flashes when the goal time is reached
- 📺 50% slow-motion replay plays automatically
🎚 Pick a Difficulty — Same Tool, Three Levels
Students who exceed their selected goal can keep holding — the tool tracks their best hold time across the whole 15-second window, so beating the target earns a higher rating.
How the Hold Timer Works
The timer only counts up while all four form checks are passing at the same time. If the student wobbles, drops their leg, or bends a knee, the timer snaps back to 0 and waits for them to correct. The best hold of the 15-second window is what gets scored — so students can try, wobble, reset, and try again for a better time without penalty.
See It In Action
Watch how BUMPTRON 5000 works in a real PE setting
What Gets Assessed
4 form elements checked continuously — the lifted leg is auto-detected, so students can use either leg as the standing leg
Standing Leg Straight
The leg on the ground must be nearly locked — knee angle of 160° or greater. Bent standing legs are the most common balance fault.
Hip–Knee–Ankle Angle
Leg Lifted High
The back ankle must be raised clearly above the back hip — not just peeled off the floor but lifted into a proper arabesque height.
Back Ankle vs Back Hip Y
Lifted Leg Straight
The back leg must be nearly locked at the knee — angle of 155° or greater. A straight line from hip to toe is the hallmark of a clean scale.
Back Leg Knee Angle
Hinged Forward
The torso must lean forward so the shoulders drop close to hip level — the forward hinge is what creates the classic arabesque line.
Shoulder Y vs Hip Y
Setup Guide
Works as a quiet balance station — requires a clear floor space and a side-on camera angle
Position Your Device Side-On
Place a laptop or tablet on a chair or table at roughly hip height, positioned so the student will be sideways to the camera. This angle is essential — front-on does not show the back leg lift or forward hinge properly. The student’s whole body, from head to raised foot, must fit in the frame.
💡 Side-on camera angle is critical for this tool
Clear Floor Space
Leave about 6 feet of open space around the student — the back leg extends well behind them and the forward hinge brings the upper body forward. Crash mats or gym mats under the student are a good idea for students who may wobble out of the hold.
💡 Soft surface underneath helps with confidence
Wait for Pose Engine & Pick a Difficulty
Wait for ● POSE ONLINE to appear in the header and the skeleton overlay to show up on the live video. Then tap EASY, MED, or HARD in the header to set the hold-time goal.
💡 Difficulty can be changed between students with one tap
Student Gets Into Starting Position
The student stands sideways on two feet, facing across the camera’s view. They can choose either leg as their standing leg — the tool auto-detects which leg is lifted and adjusts the checks accordingly. Arms can be out to the sides or forward, whatever feels most balanced.
💡 Arm position is not checked — any comfortable position is fine
Press READY & Hold on Cue
Press READY to start the countdown. On GO! the student lifts one leg behind into a scale. A hold timer appears on the video — it counts up while all four checks are passing and resets to 0 if form breaks. Students have a 15-second window to achieve their best hold.
💡 Wobbles are fine — just reset the pose and keep trying for a best time
Review the Replay & Best Hold
After 15 seconds the video plays back at 50% speed automatically. The side panel shows the best hold time achieved. The slow-motion replay makes it easy to spot exactly when form broke — a bent standing leg, a dropping back leg, or a lifted torso.
💡 Press TRY AGAIN to immediately attempt another hold
Scoring & Ratings
Ratings are based on actual hold time, not the selected difficulty — so exceeding the goal always earns a higher rating
💡 Teacher Tips
- 🔄 Run as a self-managed station within a gymnastics circuit — one device handles a rotation while other students work on tumbling, rolls, or mat skills at separate stations
- 📺 Connect to a TV or large monitor so the group can watch the slow-motion replay together — great for peer feedback and coaching discussion
- 🎚 Start every student on Easy and let them progress through the levels — completing all three difficulties across a unit makes a satisfying personal challenge
- 🧘 Remind students to pick a spot on the wall to stare at — fixed gaze is the single biggest factor in extending balance hold times
- 📏 Emphasise slow lifts rather than quick snaps — students who move slowly into position hold significantly longer than those who rush
- ☀️ Avoid direct sunlight behind the student — consistent even lighting helps the pose engine track the back leg cleanly against the background
- 🔋 Keep the device plugged in — pose detection is CPU intensive and will drain battery quickly during a full lesson
Launch SCALE IT 5000
Opens in a new tab — allow camera access, pick a difficulty, and press READY when in position.
Members Only
SCALE IT 5000 is available on our Starter and Pro plans. Sign up to access all assessment tools.