participant portal

Wearing the sensors

Coming soon

In this study, you will wear 4 sensors to track your arm movements throughout the day

Equipment

The Sensors

Small, light sensors that attach to your body and track how you move throughout the day while going about your daily activities. Your therapist will help you the first time - this page is here whenever you need to look something up.

Instructions

What will you receive

You will receive a box containing everything you need for the next 6 weeks:

✓ 4 sensors (Figure 1.b)
Small orange-and-black devices that record your movement.

✓ Charging dock and cable (Figure 1.c)
To charge all sensors at once via USB.

✓ 5 straps and pouches (Figure 1.d)
Velcro straps to attach the sensors to your body.

How to put them on

Insert each sensor into its pouch with the orange face pointing outward.

Your therapist will show you the exact placement and work with you to find what's most comfortable.

1
Non-affected forearm

In line with the back of your hand.

2
Chest

Middle of your chest, on the breast bone.

3
Affected upper arm

Mid-point between shoulder and elbow.

4
Affected forearm

In line with the back of your hand.

How to start collecting data

Your sensors should already be charged for first use. Do this together with your therapist the first time.

1

Turn on the sensors

Press and hold the orange face for 2–3 seconds. Light turns green, then orange.

The sensor is on but not yet recording.

2

Open the PH Data Collection app on the laptop

Find the app icon on the desktop and open it.

3

Place sensors near the laptop

Select "Sensors are On! Continue".

The app will search for your sensors.

4

Confirm all 4 sensors — select "Yes"

If not all 4 appear, see the FAQ or contact your therapist.

5

Put on the sensors and start

Select "Sensors placed. Start data collection."

Green blinking light = recording.

Data collection runs for 2 hours. After that, a sound plays and the sensors shut down automatically.

How to turn off sensors and charge

Your sensors should already be charged for first use. Do this together with your therapist the first time.

1

Turn off

Press and hold the same button for approx. 3 seconds. The light should turn off completely.

2

Remove from pouches before charging

Data collection duration

Data collection runs for 2 hours. If you need to stop earlier, select "Stop data collection" in the app. A sound will play and the sensors will shut down automatically when the session ends. If a blinking light remains, turn the sensor off manually.

Chapter 5

FAQ

Common troubleshooting issues and how to resolve them.

Can I shower or wash dishes with the sensors on?

No — remove the sensors before any contact with water. Put them back on afterwards.

What if not all 4 sensors appear on the screen?

Make sure all sensors are turned on and placed close to the laptop. If the problem continues, contact your therapist.

What does the blinking green light mean?

The sensor is recording — this is what you want to see when going about your day.

What if I forget to wear the sensors?

Don't worry — just let your therapist know at the next visit.

The sensor feels uncomfortable — what should I do?

Talk to your therapist. They can help adjust the placement or tightness of the straps.