By teaching lifters to "listen to their bodies" and adjust weights on the fly, the book helped bridge the gap between intermediate and advanced training. It led to the founding of Reactive Training Systems (RTS) , which has since coached hundreds of world-class athletes. Core Concepts of the Manual
Drawing inspiration from the Borg Scale (originally used for aerobic exercise), Tuchscherer developed a 1–10 lifting scale based on "Reps in Reserve" (RIR) . The Reactive Training Manual_ Developing Y - Mi...
Traditional powerlifting programs used fixed percentages based on a lifter's one-rep max (1RM). Tuchscherer found these ineffective because a lifter's strength fluctuates daily based on sleep, stress, and recovery. By teaching lifters to "listen to their bodies"