One Leg Balance

An interactive balance assessment system using an IMU sensor to monitor stability in real time.
Designed to provide instant visual and audio feedback during one-leg standing exercises.

How it works

  1. Secure the sensor to your lower leg or hold it in your hand.
  2. Press the button to start or stop the stopwatch manually. Alternatively, press A to enter the desired countdown time and press B to begin.
  3. The system continuously monitors body movement. The display shows “Stable” when balance is maintained and “Unstable” when instability is detected. Different beep sounds indicate transitions between stable and unstable states. Music plays when the countdown ends and every 30 seconds during the exercise session.

User Feedback and System Improvement

Feedback

  • Easy to use and clear feedback
  • Sensor has great sensitivity
  • Lots of wires
  • Can be combined with other exercises

Improvements Made (see Balancing and March Steps)

  • Upgraded to wireless connection
  • Combined with march steps

Schematics

 

Features

IMU-Based Stability Detection

The system uses an IMU sensor to detect tilt and movement, determining whether the user is stable or unstable.

Dual Start Modes

Users can start the exercise using a manual stopwatch button or set a customized countdown using the keypad.

Real-Time Visual and Audio Feedback

Displays stability status on the LCD, triggers a buzzer during instability, and plays music at timed intervals.

Related Prototypes