Introduction: Although the pressure biofeedback unit (PBU) is used for muscular assessment and training, there is little evidence of its reproducibility and repeatability.
Objective: This study aims to assess intra- and inter-rater reproducibility and repeatability of the PBU in the assessment of the transverse abdominal (TrA), internal oblique (IO), low back multifidi, and deep neck flexors (DNF).
Methods: Fifty individuals had three muscular groups tested: TrA/IO, lower back multifidi, and DNF.