The Soviet Weightlifting Files

In the 1960s and 70s, Soviet sport scientists studied thousands of weightlifters. They found something counterintuitive: the athletes who trained at maximum intensity every session plateaued fastest. The athletes who varied intensity — heavy days, moderate days, light days — progressed for years.

This became the foundation of periodization. The lesson: overload is not a straight line. It’s a wave. Push, then recover, then push higher. The body adapts to the wave, not the spike.