This study aims to investigate: (1) the construct validity of the “Blended Learners’ Online Component Challenges” BLOCC scale. (2) the internal reliability of the scale, and (3) the differences between blended learners’ online component challenges according to different socio-demographic variables for Sport Science students. The sample of the study consisted of 263 students enrolled in blended learning classes at the School of Sport Sciences/ University of Jordan. The BLOCC scale was used to collect the required data. The scale measures the four different online component challenges; (1) Self-Management Challenges (SMC), (2) Technology Competency and Literacy Challenges (TCLC), (3) Student Isolation Challenges (SIC), and (4) Technological Sufficiency and Complexity Challenges (TSCC). BLOCC scale proved to be valid and reliable (four items were omitted); The overall fit statistics for the hypothesized four factor model (χ2 (df = 2.69) = 603.47, p