Quick answer: “Break a sweat” means to make a physical or mental effort; it's often used negatively (“didn't even break a sweat”) to say something was accomplished easily.
Break a sweat — To exert physical or mental effort; commonly used in negative constructions such as “didn't even break a sweat” to describe accomplishing something with ease.
Meaning
To “break a sweat” literally means to exercise or work hard enough to start perspiring. Figuratively, the phrase is used to talk about the amount of effort something requires. Most often it appears in a negative form — “without breaking a sweat” or “didn't break a sweat” — to emphasise that a task was completed easily, almost effortlessly, usually because the person is skilled, strong, or well prepared.
The idiom can also be used affirmatively, as an instruction or encouragement to make an effort, particularly in a fitness or work context (“you need to break a sweat if you want results”). It is a common, everyday expression heard in sports commentary, workplace conversation, and casual speech about challenges of any kind, physical or mental.
Origin & Usage Note
The idiom likely grew out of the simple, literal link between hard physical effort and perspiration: strenuous exercise or labour makes the body sweat, so “breaking a sweat” marks the point where effort becomes visible. The phrase probably became popular through sport and fitness culture before spreading into general figurative use for any kind of demanding task, physical or mental. As with many effort-related idioms, it is difficult to pin down an exact origin, but the underlying image has stayed consistent and easy to picture, which is likely why it remains in everyday use.
Example Sentences
| Sentence | Context |
|---|---|
| He ran the marathon and didn't even break a sweat. | Sports; praising someone's fitness or stamina |
| You'll need to break a sweat if you want to finish this project by Friday. | Workplace; encouraging genuine effort |
| The champion beat her opponent without breaking a sweat. | Sports commentary; describing an easy victory |
| Relax — it's just a short quiz, nothing to break a sweat over. | Reassuring someone before a minor challenge |
| The new employee broke a sweat trying to keep up with the veteran team. | Describing genuine effort at work |
| She solved the puzzle without breaking a sweat. | Mental effort; describing intellectual ease |
How to Use It
“Break a sweat” is most common in the negative pattern “without breaking a sweat” or “didn't break a sweat”, used to highlight how easily something was done. It can also stand alone as encouragement to try harder (“go on, break a sweat!”). The idiom fits casual conversation, sports writing, and workplace banter, but is rarely used in formal or academic contexts. It applies naturally to both physical exercise and mental or professional tasks.
Common Mistakes
Mistakes to Avoid
She broke a sweat during the exam because she was so nervous.
She broke out in a sweat during the exam because she was so nervous. — “Break a sweat” refers to effort, not nervous perspiration; use “break out in a sweat” for anxiety.
He finished the race without breaking sweat.
He finished the race without breaking a sweat. — The article “a” is required; “breaking sweat” without it sounds unnatural.
They won the game without to break a sweat.
They won the game without breaking a sweat. — After “without”, use the gerund form “breaking”, not the infinitive.
Similar Idioms
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Quick Check: Break a sweat
2 questions — test what you just learned.
1. What does “break a sweat” mean?
2. Complete the sentence: “She won the race without _____.”
Frequently Asked Questions
What does “break a sweat” mean?
“Break a sweat” means to exert physical or mental effort, especially the kind of effort that would normally make you perspire. It is most often used in negative sentences, such as “she didn't even break a sweat”, to say that something was accomplished easily and without visible strain.
Where does the expression “break a sweat” come from?
The idiom likely comes from the simple physical fact that hard exercise or labour makes a person perspire. The phrase probably grew out of sporting and fitness contexts, where “breaking a sweat” marks the point at which effort becomes noticeable. Over time it broadened into a general figurative expression for effort of any kind, physical or mental.
Can you give an example of “break a sweat” in a sentence?
Here is an example: “He ran the marathon and didn't even break a sweat.” The sentence praises the runner's fitness by suggesting the race felt effortless to him.
Is “break a sweat” formal or informal?
The idiom is informal and conversational. It appears frequently in everyday speech, sports commentary, and casual writing, but it is rarely used in formal reports or academic writing, where literal language is preferred.
What CEFR level is “break a sweat”?
This idiom is typically encountered at B1 level. It is a common, high-frequency expression that appears early in a learner's exposure to spoken English, especially around topics like sport, work, and effort.
What are common mistakes with “break a sweat”?
A common mistake is confusing “break a sweat” (meaning effort) with “break out in a sweat” (which usually describes a nervous or anxious reaction). Learners also sometimes drop the article, saying “break sweat” instead of “break a sweat”, or use the wrong preposition pattern after “without”.
Is “break a sweat” usually used positively or negatively?
It can go either way. Used affirmatively, it simply means to make an effort or start exercising. Used in a negative construction — “without breaking a sweat” or “didn't break a sweat” — it means something was done with surprising ease, often to highlight someone's skill or strength.
Can “break a sweat” refer to mental effort, not just physical exercise?
Yes. Although the image is physical, the idiom is often applied figuratively to mental or professional tasks — for example, “she solved the puzzle without breaking a sweat” describes intellectual ease rather than physical exertion.
How do I practise idioms like “break a sweat”?
LexFizz's Flip Tiles and Flash Cards exercises are excellent for practising English idioms in context. Try using the idiom in your own sentences about sport, work, or study, and listen for it in sports commentary or interviews.
Is “break a sweat” used in both British and American English?
Yes. “Break a sweat” is common in both British and American English, and it is widely understood across other English-speaking regions as well, especially in contexts involving sport, exercise, or effort.