Related Experiment Video
Updated: Jun 14, 2026

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
Published on: January 24, 2018
Effect of using truncated versus total foot length to calculate the arch height ratio
Thomas G McPoil1, Mark W Cornwall, Bill Vicenzino
1Gait Research Laboratory, Department of Physical Therapy & Athletic Training, Northern Arizona University, Flagstaff, AZ 86011, USA. tom.mcpoil@nau.edu
Objective:
The purpose of this study was to determine the arch height ratio in a large cohort of subjects as well as to assess the reliability and validity of the foot measurements utilized in the study.
Method:
Eight hundred and fifty subjects, 393 women and 457 men, consented to participate in the study. The dorsal arch height, total foot length, and the truncated foot length were used to calculate two variations of the arch height ratio. In addition to determining within- and between-rater measurement reliability, radiographs were used to establish validity.
Results:
The truncated arch height ratio can be estimated using the total foot length, unless toe deformities are present in the individual being assessed. All foot measurements had high levels of intra- and inter-rater reliability and the validity of measuring the dorsal arch height while standing with equal weight on both feet was established.
Conclusions:
This investigation provides normative values from a large cohort of healthy female and male subjects for two variations of the arch height ratio. The arch height ratio is a reliable and valid measurement that may prove useful to clinicians and researchers for the classification of foot posture.
Related Concept Videos
Hyperbolic and Inverse Hyperbolic Functions: Problem Solving
Second Derivatives of Implicit Functions
Adjusting a Traverse
Spanning Openings in Brick Walls
Lintels are primary supports used to span openings and can be crafted from materials such as reinforced concrete, steel-reinforced brick masonry, or simple steel angles. These are straightforward to install and are typically concealed...
Trigonometry of Right Triangles
Beams with Unsymmetric Loadings
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...