Based on the latest scientific developments and perspectives, with a critical use of recent evidence-based practices from international literature. Essential for every scientist coach (regardless of sport) and applied health professional (dietitians, sports doctors), as well as for the comprehensive education of undergraduate/postgraduate students.

The content of the book covers a wide range of specialized thematic units with documented scientific information and detail, such as:
- Elements of developmental pediatrics and basic knowledge of developmental biology
- Foundations of athletic development, motor control, and comprehensive athletic assessment in developmental ages
- Training methodology for the development of strength and power for all sports
- Special topics in adolescent sports medicine pathology
- Fundamental knowledge/current trends in applied athlete nutrition.

Given that acquiring knowledge is an ongoing, personal journey of continuous search, for the progress and evolution of coaching in developmental ages, it is imperative to have a common starting point of documented scientific knowledge for all coaches. Every colleague will find in this book a clear, logically structured functional framework of actions/guidelines for the development of fundamental training programs for pre-adolescent children.
Documented answers are provided to many disputed topics through the summary of theoretical and practical knowledge. Efforts have been made to systematically organize the scattered knowledge in international literature with clarity, simplicity, and classification of specific training goals, to make it accessible to every Greek colleague with practical applications and specific performance criteria proposed for each age.

This book belongs to every anonymous gym instructor-coach, with a pedagogical orientation and creative abilities, who initially must inspire and transform into action the love of the young child for sports. At a subsequent stage, methodically, they must evaluate, weigh, and diagnose the capabilities/athletic abilities of each young athlete, in order to later guide them to the appropriate sport with increased chances of distinction.
Every coach works tirelessly, offering such incentives to the physical and mental reserves of the young athlete, to ensure:
- the longest possible athletic career
- the maintenance of their enthusiasm
- the daily struggle to become a "fighter" and improve themselves
- the shaping of their character.