When people who lift weights do superset training (doing exercises back-to-back without rest), their bodies produce more lactic acid and burn more energy during and after workouts compared to regular training. This means their muscles work harder and get more stressed.

When people do superset workouts (doing exercises back-to-back without rest), their bodies work harder and show more signs of effort—like higher heart rate, more sweating, and feeling more tired—compared to doing regular workouts with rest breaks.

When trained men do certain types of weightlifting workouts, their bodies produce more lactic acid compared to other workout styles, which means their muscles are working harder and under more stress.

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.

For people who already lift weights, doing superset workouts (where you do exercises back-to-back) gives about the same results for building strength, endurance, and muscle size as regular workouts over a few weeks.

A faster workout method called superset training cuts exercise time by over a third without reducing reps or weight, making workouts much more efficient for people who already exercise regularly.