Progressive Overload
Definition: The gradual increase of stress placed on the body during exercise training. This is the #1 principle behind muscle growth — you must consistently increase weight, reps, or volume over time to force adaptation.
Why It Matters
Understanding progressive overload is essential for making real progress in your fitness journey. Without this knowledge, you risk spinning your wheels — training hard but not seeing the results you deserve.
Callio automatically tracks and applies progressive overload principles to your training program, so you don't need to be an exercise scientist to benefit from evidence-based programming.