The Youth Physical Development (YPD) Model
An evidence-based alternative to rigid LTAD
Key Findings
Abstract: previous long-term athlete development (LTAD) models classified youth training methodologies by CHRONOLOGICAL age groups — an approach with distinct limitations
Abstract: more recent models tried to bridge maturation and periods of trainability for a limited number of fitness qualities, but appear to be based on subjective analysis
Abstract: the YPD model is offered as a logical, evidence-based approach to the systematic development of physical performance in young athletes — for S&C coaches, physical educators, sports coaches and parents
Full text (not checked against the abstract): all physical qualities (strength, speed, endurance, power, coordination) are trainable throughout childhood and adolescence — the model changes the EMPHASIS with maturation, not the presence of adaptability; it uses biological age / maturation (peak height velocity) rather than chronological age; it rejects the "critical windows after which it is too late" idea of classic LTAD
Practical Application
Conceptual model (Lloyd & Oliver): LTAD by chronological age has distinct limitations and "windows of trainability" models rest on subjective analysis; the YPD model instead sequences emphasis across maturation while treating every quality as trainable at every stage (full text; not checked against the abstract). For a youth coach: shift emphasis, never drop a quality
Orient by biological age (maturation), not chronological age (full text; not checked against the abstract)
Early emphasis on technique/coordination/neuromuscular qualities; the strength/power emphasis grows with maturation (full text; not checked against the abstract)
Lesson for masters: adaptability does not "close" — the parallel to REF-346/349 is the base's reading, not a claim of this paper. Inference, not tested
Limitations
A conceptual model, not an intervention study with effect sizes; the abstract carries no data
Specific to a growing organism; direct transfer to adults/masters is limited
Individual variability in maturation is large
How this entry was checked and changed
Content correction 2026-09-27
The model's specifics (all qualities trainable, PHV/biological age, rejection of critical windows) are not in the brief abstract; labelled as full text
Sport line "strength, para-sport" -> "general, strength" (nothing para-specific in the paper)