How can I maximize how many gait metrics are reported in a Walk trial?

Summary: To maximize the number of gait metrics reported, use the longest straight walkway practical, execute turns beyond the ends of the measured walkway, and collect enough steady-state strides. A minimum walkway length of 7 m (23 ft) is recommended.

Why this matters: The Walk analysis is designed for steady-state, straight-line gait. Strides affected by turns, non-level walking, poor signal quality, or sequence/timing failures are excluded to reduce inaccurate reporting. The number of reported metrics therefore depends on how many strides remain valid after all quality checks.

Processing steps that affect metric yield:

1. Still-period detection At least one still period per foot is required for sensor bias/orientation estimation. The initial countdown standing period is intended to satisfy this requirement.
2. Stride detection At least 2 detected strides per foot are required across the trial; otherwise, no gait metrics are reported.
3. Stride validation Strides inconsistent with level, straight walking (for example, turns or incline/stairs signatures) are excluded.
4. Stride sequencing Remaining strides are matched into alternating left-right sequences using timing criteria; unmatched strides are excluded.
5. Metric computation Metrics are computed only from valid left-right gait cycle sequences.
6. Metric thresholding Computed metric values outside acceptable bounds are excluded as likely non-physiologic or poor-quality estimates.

Practical recommendations:

• Use a straight, level walkway and make it as long as feasible.
• Use at least 7 m (23 ft); longer is better.
• Instruct subjects to turn after passing the walkway end, not within the measured segment.
• Record multiple passes to increase the number of valid gait cycles.
• Ensure strong setup quality: secure sensor placement and a clear still period before walking.

Notes:

• Fast walkers and/or long strides can produce fewer valid cycles on short walkways, even when the trial appears acceptable.
• The key lever for increasing reported metrics is increasing the amount of steady-state straight walking captured.