Association of Use of a Mobile Tackling Dummy During College Football Practice With Reduced Sport-Related Concussion: Results of a Pilot Investigation.

Post hoc pairwise comparisons of the number of SRCs at different time intervals—thereby representing policy and rule changes—were performed using Tukey tests for significant or near-significant ( P < .10) models.

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Nevertheless, these associations fell well above the Ferguson 7 criteria for a practically significant effect and were broadly of moderate strength.

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Next, a consistent trend of lower frequency of SRCs during the seasons with the no-tackle practice policy was observed, although these did not reach statistical significance, likely because of limited power (see Table 5 ).

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