2026-10-11T03:14:39Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34025575 2026-09-29T17:23:36Z category_272 category_45 category_734 category_106 category_133 portal_5 item_type_1 month_year_09_2026

<p>Flexible adjusted PPE trajectories by elite status after exclusion of COVID-disrupted seasons.</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>Predicted Singles PPE, Doubles PPE, and Total PPE were obtained from player-year models in which centred year was modelled using a natural cubic spline with three degrees of freedom and interacted with elite status. The COVID-disrupted seasons 2020–2021 were excluded from model fitting. Models were adjusted for age and discipline-specific competitive event exposure, with cluster-robust standard errors at the player level. Predictions were generated at age 16 years and at median covariate values of 8 singles competitive event entries, 7 doubles competitive event entries, and 15 total competitive event exposures, respectively, and are displayed on the back-transformed log1p scale with 95% confidence intervals<b>.</b></p> 2026-09-29T17:23:14Z Image Figure 10.1371/journal.pone.0359538.g003 https://figshare.com/articles/figure/_p_Flexible_adjusted_PPE_trajectories_by_elite_status_after_exclusion_of_COVID-disrupted_seasons_p_/34025575 CC BY 4.0