.am4 — ActiLife Motion Analysis File v4
ActiGraph · 2017
An .am4 file stores raw, time-stamped accelerometer data from ActiGraph devices for motion and activity analysis.
Key Features
- Stores raw, high-resolution accelerometer data.
- Includes time-stamps for precise event correlation.
- Contains device and collection metadata.
- Optimized for scientific motion and activity analysis.
Best For
- Longitudinal studies requiring detailed activity data.
- Research focused on objective physical activity measurement.
- Analyzing sleep patterns with high granularity.
- Collecting data for clinical validation of interventions.
Less Ideal For
- General data sharing due to proprietary nature.
- Storing images, audio, or video content.
- Applications requiring simple text-based data logs.
- Use cases where open-source or widely compatible formats are needed.
Common Use Cases
- Analyzing physical activity levels in research studies.
- Assessing sleep quality and duration.
- Monitoring patient rehabilitation and recovery.
- Studying biomechanics and movement patterns.
- Capturing detailed data for objective health assessments.
How to Open It
- Open .am4 files exclusively with ActiLife software provided by ActiGraph.
- Ensure you have a licensed version of ActiLife to access and process the data.
- The software allows for data export into more common formats for further analysis.
- Consult ActiGraph documentation for specific import and analysis procedures within ActiLife.
What is a .am4 file?
The .am4 file format is proprietary and used by ActiGraph's ActiLife software for storing raw accelerometer data collected from their wearable devices. This data is crucial for researchers and clinicians studying human movement, sleep patterns, and physical activity levels. It captures detailed, time-stamped motion information, allowing for sophisticated analysis of activity metrics. The format is designed to be robust and capture high-resolution data efficiently for scientific applications.
Programs That Open .am4 Files
| Platform | Program | ||
|---|---|---|---|
| Windows | ActiLife | Paid | Official |
| macOS | ActiLife | Paid | Official |
How to Convert .am4 Files
| Format | Method |
|---|---|
| .CSV | ActiLife Software |
| .EDF | ActiLife Software |
Common Problems with .am4 Files
Frequently Asked Questions
An .am4 file is a proprietary data file used by ActiGraph's ActiLife software to store raw accelerometer data from their wearable motion sensors.
No, .am4 files can only be opened and processed using ActiGraph's official ActiLife software. They are not compatible with general-purpose data viewers.
.am4 files store high-resolution, time-stamped raw data from the device's accelerometers, along with associated metadata.
Technical Details
The .am4 file is a binary format that contains raw, un-processed sensor readings from ActiGraph's accelerometers. It typically includes time-stamped x, y, and z-axis data points, device metadata, and potentially event markers. The data is usually collected at a high sampling rate for detailed analysis of movement.