Biological Versus Chronological Age in Youth Sports

What Is Chronological Age?

Chronological age refers to the number of years since birth or when one was born. It is usually expressed in months and days (birthdays are not counted). Some countries use different methods to count years. For example, Japan counts from year 0 rather than 1 like the United States does. The difference between these two numbers is called “youth” and it’s why many sports such as soccer, basketball, baseball etc. have their own age categories.

How To Calculate Training Age?

The simplest way to determine your youth is to look at your height. If you’re 5’7″ tall, then you would be considered young if you were born in January of 1957.

Sources & references used in this article:

Chronological age vs. biological maturation: implications for exercise programming in youth by RS Lloyd, JL Oliver, AD Faigenbaum… – The Journal of …, 2014 –

Growth dynamics in the context of pediatric sports injuries and overuse by EB Zwick, R Kocher – Seminars in musculoskeletal radiology, 2014 –

Bio-banding in youth sports: Background, concept, and application by RM Malina, SP Cumming, AD Rogol… – Sports Medicine, 2019 – Springer