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The IDP Problem: Great on Paper, Lost in Practice

youth IDP player-development

The Plan Nobody Opens Twice

Pre-season. The coaching staff sit down, fill out Individual Development Plans for every player in the academy. Goals are specific, templates are tidy. How many of those files get opened again by March?

The IDP has become a standard tool in youth football academies — the vehicle that should translate Long-Term Athlete Development (LTAD) principles into daily practice. Individualisation, monitoring, longitudinal tracking: these are the pillars. The trouble is, those exact pillars show the lowest adherence rates among practitioners (Till et al., 2022). Good intentions do not guarantee good execution. So what needs to change for IDPs to move from wish lists to working tools?

Today’s Star, Tomorrow’s Question Mark

Every IDP starts with reading the player. That starting point is shakier than most academies want to admit.

A large-scale analysis of 34,839 individuals found that 82% of youth international-level performers never reached the senior stage. Flip it around: 72% of senior international performers had never been selected at youth level (Güllich et al., 2025). Predicting adult success from adolescent performance is a bit like forecasting the weather a month out — you will get the season right, but the daily details will surprise you.

The way scouts form judgements does not help. A survey of 125 scouts from Dutch professional clubs and the Royal Netherlands Football Association (KNVB) revealed that most claimed to evaluate attributes individually, yet formed their final call on an overall impression (Bergkamp et al., 2021). They start systematic and finish intuitive. That kind of unstructured integration lets confirmation bias and maturation bias walk right through the door.

What about potential? When experienced academy coaches rated both current skill performance and five-year potential, the two scores were nearly identical (McCalman et al., 2025). Potential assessment collapsed into a mirror of present performance. When that confusion sits at the starting point of an IDP, early-maturing players absorb resources and late developers lose opportunity.

There is a case study of a multiple Ballon d’Or-nominated player who accumulated over 1,000 hours of annual football training from age five (Tønnessen et al., 2025). Impressive — until you read the details. His father held a UEFA Pro Licence with 16 years of professional playing experience, the vast majority of training was unstructured play, and the player showed exceptional motor development from infancy. This is an atypical case embedded in atypical conditions. A population-level analysis of 34,839 individuals and a single retrospective success story do not sit on the same shelf. Development pathways are not uniform — which is precisely why an IDP must reflect individual context rather than follow a single template.

Watch the Film, Not Just the Still Frame

Assessing a player through a single dimension is like judging a film from one screenshot. You might catch a good moment, but you will miss the plot. Isolated assessment data (Signs) lack match context. Match performance data (Samples) cannot separate individual contribution from team dynamics. Subjective Expert Opinion (SEO) carries the biases described above. No single source is enough on its own — a multidisciplinary profiling approach that combines all three is necessary (Barraclough et al., 2025).

Perceptual-cognitive skills belong in the IDP conversation, but timing matters. Elite-sub-elite differences in these abilities only emerged at U19 and above; at U12 through U17, there was no meaningful separation (Ehmann et al., 2022). Using perceptual-cognitive tests to sort young players in or out is premature. The better move is designing training environments that continuously demand complex decision-making — letting the skill develop rather than measuring it prematurely.

So is one assessment enough? Player development is non-linear. A growth spurt can temporarily disrupt coordination and physical outputs. A low score at one time point may reflect a developmental phase, not an ability deficit. Six-week, quarterly, and annual review cycles allow practitioners to separate short-term noise from long-term trajectory (Barraclough et al., 2025). Without that time axis, a snapshot becomes a verdict.

From Plan to Pitch

An IDP that lists goals without connecting them to training tasks is a New Year’s resolution — well-intentioned and quickly forgotten. Translating IDP targets into practice requires a dedicated role that bridges coaching, sport science, and skill acquisition. The Skill Acquisition Specialist mediates IDP discussions, co-designs training tasks with coaches, and connects the player-coach-support staff triad (Otte et al., 2024).

Two principles anchor the link between plan and pitch.

First, learning demands uncertainty. Repeating what a player can already do is maintenance, not growth (Hodges & Lohse, 2022). Too easy and no new information gets processed; too hard and the player cannot extract useful feedback. Because every player’s sweet spot differs, the IDP should specify not only targets but a difficulty pathway tailored to the individual.

Second, opposed practice creates a richer learning environment for match transfer (Parry et al., 2025). An opponent generates real-time perceptual information that the player must detect and adapt to — alive movement problems that demand continuous reorganisation. This does not mean drills are useless. The point is not drills versus games. The point is intentional sequencing: knowing why you choose a particular task format at a particular moment in a player’s development.

When the Organisation Does Not Follow

Even a brilliantly designed IDP stays on paper if the organisational structure does not support it. A study of 26 elite European clubs found that 10 had no regular communication between youth and professional domains, and 12 relied only on indirect communication through a sporting director (Relvas et al., 2010). When the player profile the academy develops does not match what the first team demands, the transition becomes a cliff rather than a bridge.

A Delphi study with 80 high-performance experts reached one clear consensus: the IDP should function as a shared tool across the Multidisciplinary Team (MDT), not a single coach’s document (Hydes et al., 2026). Physical, technical, tactical, and psychological dimensions viewed together in one frame — not reported in separate silos. That said, this is expert consensus. Whether shared IDPs actually improve development outcomes remains untested.

One more thing. Importing another club’s IDP template wholesale is transplanting form, not function (O’Sullivan et al., 2023). Principles can travel across contexts, but implementation must be redesigned to fit the club’s resources, culture, and game philosophy.

Practical Implications

  • Longitudinal tracking over single-point assessment. Review player profiles at six-week, quarterly, and annual intervals. One data point should never determine a player’s pathway.
  • Multidisciplinary integration. Combine physical, technical, tactical, psychological, and perceptual-cognitive data within a single framework. The MDT participates jointly in IDP reviews — no isolated reports.
  • Player agency. The IDP is not imposed on the player. The player is a problem-solver; the coach is a facilitator.
  • Profiling-to-training connection. Secure a dedicated role that translates developmental goals into concrete training tasks. Design difficulty pathways, not just endpoints.
  • No copy-paste. Principles are portable; templates are not. Redesign IDP structures to fit your own context.

The honest truth is that IDPs remain empirically unverified. Almost no longitudinal research has tracked whether IDP quality actually improves player development outcomes. Evidence on female players, late maturers, and resource-constrained settings is notably scarce. The IDP is not an answer — it is a structure for asking the right questions, at the right time, with the right data. It earns its place only when those questions are specific, the monitoring is longitudinal, and the organisation behind it actually follows through.

References

  1. Barraclough, A., Sherwood, T., Till, K., & Sherwood, C. (2025). Challenges and solutions to talent (de)selection and development in a youth soccer academy. Frontiers in Psychology. https://doi.org/10.3389/fpsyg.2025.1636386
  2. Bergkamp, T. L. G., den Hartigh, R. J. R., Frencken, W. G. P., Hagemann, N., Brink, M. S., & Meijer, R. R. (2021). How soccer scouts identify talented players. European Journal of Sport Science, 22(7), 994–1004. https://doi.org/10.1080/17461391.2021.1916081
  3. Ehmann, P., Beavan, A., Spielmann, J., Mayer, J., Altmann, S., Roth, R., & Scharfen, H.-E. (2022). Perceptual-cognitive performance of youth soccer players in a 360-environment. Psychology of Sport and Exercise, 59, 102120. https://doi.org/10.1016/j.psychsport.2021.102120
  4. Güllich, A., Barth, M., Hambrick, D. Z., & Macnamara, B. N. (2025). Recent discoveries on the acquisition of the highest levels of human performance. Science. https://doi.org/10.1126/science.adt7790
  5. Hodges, N. J., & Lohse, K. R. (2022). An extended challenge-based framework for practice design in sports coaching. Journal of Sports Sciences, 40(7), 754–768. https://doi.org/10.1080/02640414.2021.2015917
  6. Hydes, S., Strafford, B. W., Rothwell, M., Stone, J., Davids, K., & Otte, F. (2026). A Department of Methodology. International Journal of Sports Science & Coaching. https://doi.org/10.1177/17479541251409729
  7. McCalman, J., Strafford, B. W., Stone, J. A., Hendricks, S., & North, J. (2025). Experienced academy soccer coaches’ perceptions of evaluating talented youth soccer players’ skilfulness. Science and Medicine in Football. https://doi.org/10.1080/24733938.2025.2536538
  8. O’Sullivan, M., Vaughan, J., Woods, C. T., & Davids, K. (2023). There is no copy and paste, but there is resonation and inhabitation. Journal of Sports Sciences, 42(1), 1–13. https://doi.org/10.1080/02640414.2023.2288979
  9. Otte, F., Yearby, T., & Myszka, S. (2024). The role of skill acquisition specialists within sports—Why every high-performance sports organization needs these experts! Journal of Expertise, 7(3).
  10. Parry, T. E., Myszka, S., Yearby, T., O’Sullivan, M., & Otte, F. (2025). The value of opposed and unopposed practice. Quest, 77(sup1), 80–100. https://doi.org/10.1080/00336297.2024.2420759
  11. Relvas, H., Littlewood, M., Nesti, M., Gilbourne, D., & Richardson, D. (2010). Organizational structures and working practices in elite European professional football clubs. European Sport Management Quarterly, 10(2), 165–187. https://doi.org/10.1080/16184740903559891
  12. Till, K., Lloyd, R. S., McCormack, S., Williams, G., Baker, J., & Eisenmann, J. C. (2022). Optimising long-term athletic development: An investigation of practitioners’ knowledge, adherence, practices and challenges. PLoS ONE, 17(1), e0262995. https://doi.org/10.1371/journal.pone.0262995
  13. Tønnessen, E., Sandbakk, S. B., Apold-Aasen, S., Sandbakk, Ø., & Haugen, T. A. (2025). The training and development process of a multiple Ballon d’Or-nominated soccer player. Frontiers in Sports and Active Living. https://doi.org/10.3389/fspor.2025.1710194