Patient testing with the ExerMetrix sensor

Six ways to lay out the testing page. All of them connect to the sensor over Bluetooth, check its calibration before testing, offer every test from today's app (73 tests in 15 groups, same test IDs), and save each recording at 100 Hz.

Test list

Today's page, modernised: sensor bar at the top, area chips, then each test with Left / Right buttons. Tapping a side opens the recorder.

Open

Guided

One step at a time — connect, check calibration, choose a test, pick a side, record. Hard to get wrong; good for new staff and tablets.

Open

Session

Build today's list of tests (or a quick set), then run them back to back with a running results list and a summary download at the end.

Open

Body map

Tap the joint on a body to list its tests for that side.

Open

Left vs right

Record both sides back to back; the gap shows at once.

Open

At home

Simple routines for patients testing on their own (remote tests).

Open

Sensor comparison

Bench tool, not a patient test: connect any two sensors (NDSA and/or MbientLab MetaMotion), stream them with identical settings, compare accuracy and sampling rates in a report, and calibrate the NDSA.

Open

Exercise session

Training, not a clinical test: pick one of 21 exercises (strength, balance, power, Timed Up and Go), record with one or two sensors, and get a 0–100 score for depth, control, form, balance or power, with left-right balance when two sensors are on. Saved to the athlete's record.

Open

Real sensor needs Chrome or Edge (Windows, Mac, Android, ChromeOS) with Bluetooth on. iPhone/iPad browsers can't do Bluetooth; inside the ExerMetrix iOS app the Bluetooth bridge handles it.
100 Hz: the sensor has no rate setting — it always sends about 104 readings per second (vendor confirmed). Each recording is resampled to exactly 100 Hz using the sensor's own timestamps; the result screen shows both rates.
Calibration check reads the calibration stored on the sensor, then the calibrated stream while it lies still: accelerometer ≈ 1 g, gyroscope drift ≈ 0, magnetometer ≈ 1, and valid orientation data — the same limits as the Sensor Calibration page. If it fails, Calibrate runs the sensor's own magnetometer and accelerometer calibration plus a gyroscope zero.
The button on the sensor starts and stops a test.
Sensor setup matches the old MbientLab app: fusion (NDOF) data, accelerometer ±16 g, gyroscope ±2000 °/s, quaternion + magnetometer + gyroscope + accelerometer in every row. Battery under 10% blocks testing, under 40% shows red. Hold tests count down 60 seconds and stop by themselves.
Upload format matches the old app exactly: "Upload payload" on the result screen downloads the body it would POST to april/Dictionary.nsf/Assessments.xsp/addTest (then runR?openAgent): same 32 fields, rawDataFormat, Base64 RawData with one row per 100 Hz sample, same fileKey name. Three new fields are added: SampleRateHz, SensorRateHz, CalibrationConfirmed.
Upload: choose a patient first (who you can choose is set by your account: your own practice, or — for sales reps and system admins — a chosen practice). Save & upload posts the result to Assessments.xsp/addTest (5 tries) and then calls runR?openAgent.
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