Hafidz, A., Prianto, D. A., & Hidayat, T. (2022). Eight-Week Functional Training with Ascending AMRAP Model and FOR TIME Constant Load Model to Increase Abdominal Muscle Strength and Maximal Oxygen Consumption Levels in Adolescent Males. Physical Education Theory and Methodology, 22(3), 366–372. https://doi.org/10.17309/tmfv.2022.3.10