Related Experiment Video
Updated: Jun 12, 2026

Clinical Assessment of Spatiotemporal Gait Parameters in Patients and Older Adults
Published on: November 7, 2014
Determining the minimum number of steps required for reliable kinetic, kinematic, gait variability, and V̇O2
Johnny Padulo1, Raffaele Scurati1, Simone Baldo1
1Department of Biomedical Sciences for Health, Università degli Studi di Milano, 20133 Milan, Italy.
Introduction:
Outdoor running gait analysis using wearable sensors requires establishing minimum step requirements for reliable parameter measurement.
Sources Of Data:
Fourteen trained runners completed 10-minute trials at critical speed. RunScribe™ captured kinetic/kinematic data at 500 Hz. Convergence analysis determined minimum steps when cumulative means stabilized within ±2% for ≥10 consecutive steps.
Areas Of Agreement:
Most parameters achieved excellent reliability (ICC > 0.900). Metabolic parameters (V̇O₂: 108 ± 32 steps) and step rate (124 ± 36 steps) converged fastest, while kinematic variables required moderate sampling (stride length: 152 ± 48 steps; contact time: 198 ± 52 steps).
Areas Of Controversy:
Complex biomechanical metrics showed substantial variability: leg stiffness (kleg: 342 ± 78 steps; kvert: 298 ± 71 steps) and gait variability (246 ± 12 steps) required substantially more data, challenging brief field assessment feasibility.
Growing Points:
This study establishes parameter-specific sampling protocols for outdoor gait analysis, demonstrating that different measurement domains require tailored data collection strategies to optimize ecological validity.
Areas Timely For Developing Research:
Future research should examine how speed, terrain, and environmental conditions affect sampling requirements. Adaptive protocols and machine learning approaches offer promising opportunities for optimizing data collection efficiency.
More Related Videos
Related Concept Videos
Solving Problems in Physics
Kinematic Equations: Problem Solving
Exercise and Cardiac Output
Sustained exercise increases the muscles' oxygen demand, which can be met...
Determination of Michaelis Constant and Maximum Elimination Rate
These parameters can be estimated by analyzing plasma concentration data post-drug administration. A notable example of this application is phenytoin, a drug with capacity-limited kinetics. It's recommended that phenytoin should be administered at two...
Determination of Multiple Dosing Parameters: Steady-State, Minimum and Maximum Concentrations
Distance Problem

