Home/Authors/Kayla GirgenAuthorKayla GirgenBooks, tags, and list pathways readers use to discover this author.Common TagsStrength TrainingAerobicsWeight LossBooksRuck FitKayla Girgen CPT RD LD, Kayla GirgenBest Lists Featuring Kayla GirgenStrength Training BooksInterval Training (incl. Hiit) BooksReaders Also LikedKarl KnopfDr. Karl KnopfNsca National Strength & Conditioning AssociationMark LaurenJoshua Clark& 1 More