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Purpose  To compare differences in race time (i.e., the average percent difference in race time for each skier compared to the winner, RT diffs ) between female and male Para and able-bodied (AB) skiers, and to examine whether RT diffs  change across seasons.    Methods  Race data from World Cups (WCs), World Championships (WCHs), and Paralympic/Olympic Winter Games (PWG/OWGs) of the 2011–2020 seasons was extracted from the website of the International Paralympic Committee and the International Ski Federation. All individual distance races for female and male visually impaired standing (VI), physically impaired sitting (SIT) and standing (STAND), and AB skiers with ≥10 competitors were included in the analyses. We investigated the main effect of skiing groups (i.e., VI, STAND, SIT, and AB skiers) and sex on RT diffs  for top-3 and top-8 skiers. Furthermore, the main effect of season and skiing group on RT diffs  for top-3 and top-8 skiers were investigated. All models were adjusted for distance, skiing style (classical- and freestyle), and event type (WC, WCH, and PWG/OWG).    Results  RT diffs  were significantly larger in Para compared to AB skiers (top-3: 2.1 vs. 0.9%; top-8: 6.2 vs. 2.1%, all  p  &amp;lt; 0.01), and in female compared to male skiers (top-3: 1.8 vs. 1.3%; top-8: 4.9 vs. 3.5%, all  p  &amp;lt; 0.05). For top-3 skiers, RT diffs  did not significantly differ between the Para categories (all  p  &amp;gt; 0.2), while for top-8 skiers RT diffs  were significantly larger for VI compared to SIT and STAND (7.0 vs. 5.5 and 5.6%, respectively, all  p  &amp;lt; 0.05). RT diffs  were stable across the 2011–2020 seasons for top-3 skiers (VI: 1.7–3.6%, STAND: 1.1–2.2%, SIT: 1.0–3.9%, AB: 0.4–1.1%; all  p  &amp;gt; 0.1) and top-8 skiers (VI: 3.4–12.0%, STAND: 2.6–5.7%, SIT: 1.9–5.9%, AB: 0.1–1.7%; all  p  &amp;gt; 0.1).    Conclusion  The larger RT diffs  in Para compared to AB skiers indicate larger variability in performance, which are in part disability related. Female skiers displayed larger RT diffs  than their male counterparts, indicating larger variability in performance among the female skiers. Our results provide insights about performance demands in Para cross-country skiing, which is of relevance for coaches and skiers.

Comparison of Race Time-Differences Between and Within Para and Able-Bodied Cross-Country Skiers