Last 3 weeks have covered adaptations to weighted implement bat speed training over time (6-12 weeks). This study from Williams, et al. (2017) is much more recent and looks at acute changes to bat speed after warm-up (WU) protocols with different implements.
Basically, the study did not find a difference between 4 different WU protocols. There was some conflict with previous research but the authors did a nice job discussing the different results, which were mainly attributed to studying different populations (D1 college players in this one compared to HS/recreational in others).
I also appreciate the description and explanation of “kinesthetic illusion” in this study because 75% of the players chose one specific WU protocol despite no significant differences being found in the actual results.
Lastly, I think it’s important to point out that a study like this may not produce statistically significant differences, but still show an actual difference (one MPH in this case). And in the really world, even a small difference might be enough to improve performance.
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