Each group needs:

• accelerometer, see below for suggested Vernier and smartphone app options
• belt, strap, or some way to attach accelerometer to a person's lower back
• computer with Microsoft Excel®, or similar program
• (optional) capability to video record the human subject gaits; such as with a cell phone.
• Identifying Gait Metrics Activity Assessment, one per student

To share with the entire class:

• several students and/or adults of different physical characteristics to serve as human subjects; find persons that are tall, short, heavy, light, men, women, older, younger, etc.
• (optional) Four Questions Visual Aid

The author used Vernier's internal 3-axis accelerometer of the LabQuest 2, available for $329. Vernier also has a 1-axis accelerometer for $89 and a 3-axis accelerometer for $99. For data collection, those sensors require an interface to connect to a computer and Logger Lite software, which can be downloaded for free. The 1-axis accelerometer is compatible with Vernier's Go!Link interface for $61. The least-expensive interface option for the 3-axis accelerometer is the LabQuest Mini for $149, but it will also work with a LabQuest. Below are links to the mentioned products:

• LabQuest 2 at https://www.vernier.com/products/interfaces/labq2/
• Low-g accelerometer (1-axis) at https://www.vernier.com/products/sensors/accelerometers/lga-bta/
• 3-axis accelerometer at https://www.vernier.com/products/sensors/accelerometers/3d-bta/
• Logger Lite at https://www.vernier.com/products/software/logger-lite/
• Go!Link at https://www.vernier.com/products/interfaces/go-link/

As another alternative, have students download an app to access data from the internal accelerometer of a smartphone (or tablet or other device). Many free or low-cost accelerometer apps are available through Google Play for Android devices. For example, the "Physics Toolbox Accelerometer" by Vieyra Software was successfully tested and data was collected and transferred to a computer.