These are often written in the format [sets]x[reps], so 5 x 5 would be five sets of five reps each, and 3 x 10 would be three ...

Reps and sets aren’t just gym jargon—they’re the backbone of any effective workout plan. Whether you’re chasing strength, size, or endurance, knowing how to structure them can transform your results.

New insights from fitness experts reveal that the number of reps you do may be less rigid—and more strategic—than you think.