Related Experiment Video
Updated: Jan 25, 2026

Daily Transfers, Archiving Populations, and Measuring Fitness in the Long-Term Evolution Experiment with Escherichia coli
Published on: August 18, 2023
Footwear fit in schoolchildren of southern Spain: a population study
María Luisa González Elena1, Antonio Córdoba-Fernández2
1Departamento de Podología, Universidad de Sevilla, Calle Avicena s/n, 41009, Sevilla, Spain.
Background:
Recent studies support the theory that ill-fitting shoes are an important source of pain and may lead to foot malformations in the medium term. Taking as reference the ideal allowance considered in the literature, the purpose of this study was to verify the outdoor footwear fit in a population of schoolchildren of southern Spain.
Methods:
Five hundred and five children within the range of 3-12 years of age participated in this study. Using a measuring instrument designed and validated for this purpose, maximum foot length, width and height were obtained from the longest foot. These measurements were compared with the inner length, width and height of the footwear. An adequate toe allowance of 5-15 mm in length and 10 mm in width were estimated.
Results:
Inner footwear length was shorter than foot length in 33.3% of the schoolchildren. Based on the allowance established, it was observed that the footwear of the schoolchildren was too short and too narrow in 72.5 and 66.7% of the cases, respectively.
Conclusions:
Only one third of the participants analysed had well-fitted footwear. The results show that it is necessary to raise awareness among parents and teachers about the importance of replacing, periodically, the footwear of children in primary education. Manufacturers should adapt the lasts considering the use of 90th percentiles instead of mean values obtained from the growth curves of schoolchildren's feet.
Related Concept Videos
Conservation of Small Populations
Southern Blot
Denatured DNA fragments must be transferred onto a carrier membrane from the gel to make it accessible to a probe - a small ssDNA fragment complementary to the target DNA...
Induced-fit Model
Enzymes exhibit substrate specificity, meaning that they can only bind to certain substrates. This is mainly determined by the shape and chemical...
Inclusive Fitness
Goodness-of-Fit Test
What is Population Genetics?

