Definition
The actual challenging sets in a workout after warm-ups, where you use your target weight and rep scheme. These are the sets that count toward your gains and your bragging rights, in that order.
Example Usage
He spent 45 minutes on warm-ups and only did three working sets, which is either meticulous preparation or elaborate procrastination.
Origin
Standard strength training terminology from early bodybuilding culture
Fun Fact
Research suggests you get 80% of your strength gains from your first working set, making those additional sets character-building more than muscle-building.
Source: Strength training and bodybuilding terminology
Related Terms
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See “working sets” in Corporate Speak, Gen-Z Slang, Pirate Speak, and more.
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