MariposasDrop Set
A drop set is a resistance training technique where you perform a set to or near failure, immediately reduce the weight (without resting), and continue repping out again, sometimes repeating that reduction two or three more times in a single extended effort. The point is to push a muscle deeper into fatigue than a straight set allows, recruiting more muscle fibers as the heavier loads become impossible to lift with control. Most people assume drop sets are purely a bodybuilding trick for chasing the pump, but the real mechanism is cumulative mechanical tension and metabolic stress over a compressed timeframe. The nuance many lifters miss is the size of the weight reduction: drops that are too small leave you barely squeezing out one extra rep, while drops that are too large let you coast through 20 reps without meaningful effort. A reduction somewhere in the range of 20 to 30 percent of the working weight tends to land in a useful middle ground for most exercises. Drop sets are also taxing enough that piling them onto every exercise in a session tends to backfire, since recovery cost climbs fast.
Example
Say a lifter is doing dumbbell lateral raises and finishes a hard set of 12 reps with 25-pound dumbbells. They immediately grab the 15-pound pair and push for another 10 reps, then drop to the 8-pound pair for a final 8 reps, all with no rest between switches. That single triple-drop set produces a level of shoulder muscle fatigue that would otherwise take several straight sets and considerably more total time to accumulate.