Overview
Gait analysis is the systematic study of how a person walks. Here's what it measures, how technology has made it accessible, and why it matters for health.
Gait analysis is the systematic measurement of how a person walks — the timing, symmetry, speed, and mechanics of each step. For decades it lived in specialized laboratories with motion-capture cameras and force plates. Today, smartphone sensors can capture many of the same parameters during a simple walk.
What does it measure? Core parameters include walking speed, cadence (steps per minute), step length, stride symmetry between left and right, double-support time (how long both feet are on the ground), and gait variability (how consistent steps are from one to the next).
Why does it matter? Walking integrates the function of multiple body systems, so changes in gait often reflect changes in health. Research has associated slower gait speed and increased variability with elevated fall risk, and gait parameters are widely used to track recovery after orthopedic surgery. This is why some researchers call gait a candidate 'sixth vital sign.'
The practical shift is accessibility. When gait analysis required a laboratory, it was measured rarely. Smartphone-based assessment allows regular measurement in everyday settings, giving qualified care teams objective movement information over time — and making meaningful changes visible for clinical review far earlier than annual assessments would allow.
Key Takeaways
- Gait analysis quantifies speed, symmetry, cadence, and variability
- Walking integrates multiple body systems — changes often reflect health changes
- Smartphone sensors have moved gait analysis out of the lab
- Regular measurement makes changes visible for earlier clinical review