Jeff Hoehn on RIR/TrainingJeff explained the concept of RIR (Reps in Reserve) as a way to gauge training intensity. RIR refers to the estimated number of additional reps you could perform before reaching muscular failure. The goal is to train with enough intensity to drive muscle growth, but not to the point of failure every set to allow for better recovery and injury prevention.Factors Affecting RIR Accuracy @ 3:45Jeff discussed factors that can impact the accuracy of RIR estimates, includin...