Comment on: “The Effectiveness of Resisted Sled Training (RST) for Sprint Performance: A Systematic Review and Meta-analysis”
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We read with great interest the systematic review and meta-analysis by Alcaraz et al. , which aimed out to analyse the effects of resisted sled training (RST) loading and training status on sprint performance. We have several concerns that pertain to the operational basis of the review as well as to a flawed narrative around the applicability of RST (and resisted sprinting in general) to practice. Our primary aim here is to provide readers with additional context on which to base their decisions around assessment and selection of loading parameters for RST.
First of all, the need for an updated review and meta-analysis is never clearly justified by the authors. In fact, only 2 years prior a systematic review  was published citing only two fewer studies. Where relevant, the authors separate study interventions into ‘arbitrary’ categories of percentage of body-mass (%BM) loading parameters (i.e. < 20% BM [N = 12] and ≥ 20% BM [N = 3]). Of the analysed studies, 77%...
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No funding was received for this letter that may have affected study design, data collection, analysis or interpretation of data, writing of this manuscript, or the decision to submit for publication.
Conflict of interest
Matt R. Cross, Pierre Samozino, Scott R. Brown, Johan Lahti, Pedro Jimenez-Reyes and Jean-Benoit Morin declare that they have no conflicts of interest that are directly relevant to the content of this letter.
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