Knowledge Hub

What PHV means, why timing matters, and how to support training decisions.

How growth spurts change risk and what to watch for at home.

Spot high-risk phases, adjust load, and keep squads healthy.

Find out more about the error rates for our model

Find out more about the error rates for our model

Understanding how children grow and mature is key to supporting their development during school-age and adolescent years.

What PHV really means, why temporary awkwardness is normal, and how to support your child through rapid growth.

Learn how PAH percentages help explain why children of the same age develop differently and what it means for readiness.

How year-on-year growth patterns reveal important trends in your child's development and what to look for over time.

Discover how growth stages influence skill acquisition, training tolerance, and when to adjust expectations for young athletes.

A comprehensive guide to reading each section of your assessment—from PHV status to growth rate charts and markers.

Why regular measurement every 3-4 months reveals the most meaningful insights and improves prediction accuracy over time.

Understanding how grouping by maturity—not age—creates fairer, safer training for your child.

The science behind maturity-based grouping and how it improves athlete development outcomes.

Step-by-step guide to creating balanced, maturity-matched teams for training sessions.

Key indicators of appropriate challenge and how to adjust groupings during training.

How often to use biobanding, combining with age-based training, and communicating with parents.

Create an academy, register coaches for free, and link your whole coaching staff to one shared workspace.

Watch a full walkthrough of creating maturity-matched squads using the MatCalc bio-banding tool.