Superset

In plain words

Two exercises, back to back, then your rest. A superset pairs them so one rest serves both. A 2025 review of 19 studies by Zhang and colleagues found supersets fit a similar amount of work into a shorter session, with lifters rating the effort higher, and similar long-term gains in maximum strength, strength endurance and muscle size. The review names three kinds: opposite muscles, such as a press and a row; the same muscles twice; and upper body then lower body. Pairing opposite muscles let lifters complete more reps than ordinary straight sets; pairing the same muscles cut the work they could do.

An example

Bench press and barbell row, paired. You do a set of bench press, then go straight into a set of rows, then rest for 90 seconds. That is one round, and you do three rounds: six sets in all. The same six sets done one exercise at a time, with 90 seconds after every set, takes longer.