Sample size estimation revisited

<p dir="ltr">In 2020 we outlined our recommendations on sample size estimation for studies published in the <i>Journal of Sports Sciences</i> (JSS) (Abt et al., 2020). Following this editorial, Mesquida et al.(2023) reported that when testing a hypothesis only 29% of studies in JSS reported an <i>a priori</i> sample size estimation and that reproducibility of those sample size estimations was suboptimal, with only 9% reporting all necessary inputs to calculations required to reproduce the sample size. However, the data reported by Mesquida et al.(2023) was collected from studies predominately published in 2019 and 2020. The rationale for why calculating and reporting a sample size estimation is not reiterated; for that please read the original editorial(Abt et al., 2020) or see Lakens(2022). For the present editorial, we simply report a descriptive audit (Cont.)</p>