Even though drop sets felt harder and made muscles swell more, they didn’t make the blood more acidic or the heart beat faster than regular sets.

Even though drop sets felt harder and made muscles swell more, they didn’t make the body produce more lactic acid or raise the heart rate more than regular sets.

Drop sets made muscles puff up more and felt harder, but didn’t make the body produce more lactic acid or raise the heart rate more than regular sets.

After one workout, guys who did drop sets were temporarily weaker than before, more so than those who did regular sets.

Drop sets made guys feel more tired and their muscles puff up more after one workout, but they didn’t make them stronger in the long run than regular sets.

When men who already lift weights do lots of reps with lighter weights, their muscles produce more lactic acid buildup than when they lift heavy weights for fewer reps, both right away and after two months of training.