Acrobatics and tumbling is a women’s sport comprised of 3 different positions: base, top, and tumbler. Each position endures substantial impact on the musculotendinous unit, however, tumblers experience the greatest lower extremity eccentric impact leading to a high injury rate. Consistent athlete monitoring may lead to injury prevention and better insights into training. PURPOSE: The purpose of this study is to pilot observational differences in jump height (JH), peak propulsive force (PPF), peak braking force (PBF), and peak landing force (PLF) during the counter movement jump (CMJ) in acrobatics and tumbling between tumbler and non-tumbler athletes during a competitive season. METHODS: Thirty-three female acrobatics and tumbling athletes volunteered for this study and performed jump testing 3 days per week during their competition season. Data was filtered to include only subjects (n = 15; 19.6 ± 1.0 yrs, 160.7 ± 7.156 cm; 63.5 ± 17.9 kg) ten tumblers (160.12 ± 7.02 cm; 57.5 ± 19.1 kg) and five non-tumblers (162.2 ± 3.27 cm; 71.8 ± 10.0 kg) that had consistent compliance during the six-week period. Participants performed three CMJs using Hawkin Dynamics force plates and software with each CMJ separated by a ten second rest. Data was analyzed using SPSS using a 2X6 (position X time) ANOVA (pRESULTS: No significant main effects for time were found (p=0.95) and there was no significant interaction between time and position (p=0.97). There was a significant main effect for position (p=0.006). Follow up analysis observed significant differences in JH, PPF and PBF (pCONCLUSION: This was a pilot study to observe changes eccentric and concentric loading throughout the competitive season of a DIII acrobatics and tumbling team. When collapsed across time, tumblers experienced greater decline in JH, PPF and PBF throughout the season.



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