Letter to the Editor on: "Running Critical Power: A Comparison Of Different Theoretical Models".

Dear Editor,I read with interest the study by Ruiz-Alias et al. on different critical power models in running 1. The study offers valuable insights into the application of critical power in running, highlighting considerable discrepancies between different methods of estimation. While the work is commendable, it leaves room for questions regarding the methodology applied and the interpretation of the results. The omission of each participant's mean power of the trials in the study, in combination with a reluctance to share it upon request, makes it impossible for the reader to verify the results. At a bare minimum, in studies of this nature, each individual's CP and , calculated using the different methods, should be made available as it offers valuable information for readers. I elaborate on my main concerns in the following. Accompanying figures are provided in an external repository 2.