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<p>Annual median PPE trajectories by elite status among female ITF World Tennis Tour Juniors players, 2004–2025.</p> Michal Bozděch (13296415) Environmental Sciences not elsewhere classified Sociology Biological Sciences not elsewhere classified Science Policy Plant Biology xlink "> long system scenarios rather spline models showed lagged sensitivity analyses individual participation requirements female junior tennis defined annually using 57 versus 29 38 versus 17 81 %, 8 25 %, respectively higher projected efficiency median singles ppe higher subsequent ppe persistently higher ranking year models adjusted elite versus 26 point production efficiency observed linear trend fixed trp benchmarks 2004 &# 8211 total ppe defined repeated player observations total ranking points 2025 </ p year elite status total ppe year observations 97 %, point procedure performance efficiency efficiency demands doubles ppe elite status year elite linear player 510 player status interactions conditional ranking trp divided trp ), term changes temporal differentiation stage data significantly different rising performance physiological load <p>Annual median PPE trajectories by elite status among female ITF World Tennis Tour Juniors players, 2004–2025.</p> 2026-09-29T17:23:14Z Image Figure 10.1371/journal.pone.0359538.g001 https://figshare.com/articles/figure/_p_Annual_median_PPE_trajectories_by_elite_status_among_female_ITF_World_Tennis_Tour_Juniors_players_2004_2025_p_/34025569 CC BY 4.0