[SaharKazes]

אממ אני לא כך כל בטוח שזה מה שהוא אמר ^

הנה המקור:

this is a method brought to life by the great canadian coach, pierre roy. It's also been used in several strength protocols from the eastern bloc. It consists of performing the lift you want to peak your strength on twice during your workout: Once at the very beginning and once again at the end.

This approach favors motor learning and neural efficiency, while maximizing motor unit recruitment.

"why not simply do more sets at the beginning of the workout?"

that'd work to some extent, but the motor learning and technical efficiency aspects wouldn't improve much. If you perform all of the sets of one exercise in the same period, you eventually fall "in the zone," meaning that your nervous system is on automatic and there are fewer opportunities to "learn."

when you do half of your sets at the beginning and half at the end, you have to get yourself in the groove twice, making the nervous system work harder to maximize intra- and intermuscular coordination.

Not to mention that this method is a great way to boost the training volume on a lift without getting bored to death!