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- W3041956197 abstract "Anterior cruciate ligament (ACL) injuries are common in female athletes. Performance-based feedback (FB) may alter landing mechanics. PURPOSE: To provide peak vertical ground reaction force (PvGRF), loading asymmetry (LA), and frontal-plane (FP) video as post-trial landing FB to evaluate and train female collegiate athletes during single- and dual-task (ST and DT) drop landing. METHODS: 88 athletes performed both ST and DT (with/without jumping for a suspended ball) landings onto custom, portable force plates sampled at 2000 Hz. FP video showing knee-to-ankle (K:A) ratio, a surrogate for knee valgus, was recorded at 100 Hz. Performance trials were conducted in blocks of 3 ST and 6 DT pre-tests, 6 ST and 6 DT with post-trial visual FB (PvGRF in body weight (BW), LA, and FP video), and 3 ST and 6 DT post-tests. RESULTS: Quartiles were determined from PreST PvGRF to determine groups (Grp 1 < 3.45 BW; Grp 2: between 3.45-4.01 BW; Grp 3: between 4.01-4.72 BW; Grp 4 > 4.72 BW). PvGRF and K:A ratio between task (ST or DT) and over time (pre-test, post-test) were compared using a two-way repeated measures ANOVA where a group∗time interaction was observed (p<0.05). Follow-up tests revealed that Grp 3 and 4 improved PvGRF and K:A ratio from PreST to PostST that were maintained in PostDT (PvGRF: PreST to PostST Grp 3 =-20.6%, Grp 4 =-32.2%, PostST to PostDT Grp 3 = 5.0%, Grp 4 = 5.2%; K:A ratio: PreST to PostST Grp 3 = 4.1%, Grp 4 = 11.0%, PostST to PostDT Grp 3 = 0%, Grp 4 = 1.0%). Grp 1 and 2 demonstrated no change in K:A ratio despite the reduced PvGRF from PreST to PostST. These changes were not maintained during PostDT (PreST to PostST Grp 1 = -11.2%, Grp 2 =-18.3%, PostST to PostDT Grp 1 = 7.8%, Grp 2 = 2.3%). CONCLUSIONS: Collegiate athletes with PreST PvGRF > 4.01 BW may benefit more from performance-based landing FB that are maintained during DT scenarios." @default.
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- W3041956197 date "2020-07-01" @default.
- W3041956197 modified "2023-09-26" @default.
- W3041956197 title "Baseline Performance May Alter Feedback Effectiveness Of Single And Dual Task Landings" @default.
- W3041956197 doi "https://doi.org/10.1249/01.mss.0000685792.49655.ee" @default.
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