Should endurance athletes aim for "polarized" training (avoiding the threshold zone), or "pyramidal" training (with more Zone 2 than Zone 3)? A new study finds that the pattern may depend on whether you measure with HR, speed, or effort. outsideonline.com/2398833/traini…

@sweatscience @LopezGrueso_R Nice article! @DajoSanders found similar results in road cycling ncbi.nlm.nih.gov/m/pubmed/28253…

@alejandro_java @LopezGrueso_R @DajoSanders Thanks, Alejandro! (And yes, I did mention and link to Dajo's study in the article!)

@alejandro_java @sweatscience @LopezGrueso_R @DajoSanders Training load maybe...