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Related Concept Videos

Velocity and Position by Graphical Method01:34

Velocity and Position by Graphical Method

Velocity and position can be calculated from the known function of acceleration as a function of time. The total area under the acceleration-time graph and the velocity-time graph gives the change in velocity and position, respectively. In the case of an airplane, its acceleration is tracked using the inertial navigation system. The pilot provides the input of the airplane's initial position and velocity before takeoff. The inertial navigation system then uses the acceleration data to calculate...
Instantaneous Velocity - II01:10

Instantaneous Velocity - II

Instantaneous velocity is the quantity that measures how fast an object is moving along its path. In other words, the instantaneous velocity of an object is the limit of the average velocity as the elapsed time approaches zero, or the derivative of displacement with respect to time. Like average velocity, the instantaneous velocity is a vector with the dimensions of length per unit time. Instantaneous velocity can have both positive and negative values. The instantaneous velocity can be...
Average Velocity01:12

Average Velocity

To calculate the other physical quantities in kinematics, we must introduce the time variable. The time variable allows us not only to state the position of the object during its motion, but also how fast it is moving. The speed at which an object is moving is given by the rate at which the position changes with time. For each position xi, we assign a particular time ti. If the details of the motion at each instant are not important, the rate is usually expressed as the average velocity. This...

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Related Experiment Video

Updated: May 17, 2026

Lower-Limb Biomechanical Characteristics Associated with Unplanned Gait Termination Under Different Walking Speeds
05:52

Lower-Limb Biomechanical Characteristics Associated with Unplanned Gait Termination Under Different Walking Speeds

Published on: August 25, 2020

How do toddlers increase their gait velocity?

Julia Looper1, Lynette S Chandler

  • 1School of Occupational and Physical Therapy, University of Puget Sound, Tacoma, WA 98416-1070, USA. jlooper@pugetsound.edu

Gait & Posture
|October 16, 2012
PubMed
Summary

Early walking velocity increases are primarily driven by a faster step rate (cadence), not longer steps. This finding is crucial for understanding infant motor development and gait acquisition.

Area of Science:

  • Pediatric gait development
  • Infant motor control
  • Biomechanics of locomotion

Background:

  • Understanding the developmental trajectory of walking is essential for identifying typical and atypical motor patterns in infants.
  • Early walking involves significant neuromotor adaptations to achieve stable and efficient locomotion.

Purpose of the Study:

  • To investigate the specific kinematic components contributing to the increase in walking velocity during the initial 5 months of post-onset walking.
  • To differentiate the roles of step length and cadence in the acceleration of gait in early walkers.

Main Methods:

  • Longitudinal study design tracking eight typically developing children.
  • Measurement of walking velocity, cadence (steps per minute), and step length at regular intervals over 5 months.

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Quantifying Learning in Young Infants: Tracking Leg Actions During a Discovery-learning Task
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Published on: August 25, 2020

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  • Normalization of kinematic data to account for body size variations.
  • Main Results:

    • Normalized step length remained consistent throughout the 5-month observation period.
    • Normalized cadence demonstrated a significant increase over the initial 5 months of walking experience.
    • The rise in walking velocity was predominantly correlated with the increased cadence.

    Conclusions:

    • Cadence is the primary modulator of walking velocity during the early stages of gait development.
    • Infants prioritize increasing their step frequency to achieve faster walking speeds before significantly altering their step length.
    • These findings provide insights into the motor learning strategies employed during the acquisition of bipedal locomotion.