car·​dio | \ ˈkär-dē-(ˌ)ō How to pronounce cardio (audio) \

Definition of cardio

 (Entry 1 of 2)

: cardiovascular sense 2 cardio exercises



Definition of cardio (Entry 2 of 2)

: cardiovascular exercise 30 minutes of cardio daily

Examples of cardio in a Sentence

Recent Examples on the Web: Adjective

The machine allows runners to still get their cardio workout without the typical wear and tear by altering gravity, which allows for running with a lower percentage of body weight. Michaela Bechler, Vogue, "Inspired by the New York City Half Marathon? Experts Weigh in on Staying Injury-Free While You Train," 15 Mar. 2019 Mirror, as the name suggests, hangs on your wall and streams cardio classes right to your living room. Cheryl Wischhover, Vox, "Peloton’s $2,000 stationary bike has totally disrupted working out at home," 14 Nov. 2018 Daily cardio sweat sessions double as a natural endorphin high—and an opportunity to meet your next suitor. 7. Zoe Ruffner, Vogue, "10 Beauty Lessons We Learned From Sex and the City, in GIFs," 6 June 2018 Dr Ross and Robert Veatch, a professor at Georgetown University, argue that those options should include not only cardio-respiratory death, but a more liberal definition of brain death based on the irreversible loss of consciousness. The Economist, "When death is not the end," 26 Apr. 2018 Baptiste classes, a vigorous, cardio-intensive practice born out of Power Yoga, are favored by athletes. Noor Brara, Vogue, "Turn Up the Heat With Hot Yoga for a Total Spring Body Reboot," 13 Apr. 2018 Performing these moves in a circuit will mimic the muscular and cardio benefits of burpees with a lower risk of injury—and probably a lot less loathing. Jenny Mccoy, SELF, "Kate Upton’s Trainer Isn’t a Fan of Burpees—Here's Why the Move Is So Controversial," 27 Mar. 2018 The aerobic and cardio equipment at the facility is also easy to use. Lainey Seyler, Milwaukee Journal Sentinel, "Shorehaven's new Strength and Fitness Centers caters to seniors," 1 Mar. 2018 Gravocore, $279, buy now at SportsArt Eco-Pwr cardio equipment Your gift recipient: Pays for electricity, and never misses cardio day. Jay Willis, GQ, "6 Fitness Gifts for the Guy Who Has All the Fitness Gifts Already," 15 Dec. 2017

Recent Examples on the Web: Noun

She's also gotten into OrangeTheory classes—which combine cardio and strength training—and yoga. Elizabeth Gulino, House Beautiful, "The Full Details on Christina Anstead's Diet and Workout Routine," 13 July 2019 That gets everything, cardio and strength, just using your body. Roy M. Wallack,, "For Steve Aoki, the world is his gym," 26 June 2019 Exercise more than 150 minutes every week through a combination of cardio and strength training. Ladan Nikravan Hayes,, "‘Let’s Talk’: These traits increase the risk of developing breast cancer," 26 June 2019 There's a different 45-minute theme each weekend — yoga, CrossFit, cardio or strength training. Melissa Yeager, azcentral, "Hotel day passes: You don't need a room to lounge at these Phoenix hotel pools," 25 June 2019 However, regular cardio and strength-training will tone muscle and decrease the appearance of cellulite. April Franzino, Good Housekeeping, "Is It Possible to Get Rid of Cellulite? Here's What Dermatologists Say," 24 May 2019 Mouratoglou said Williams had done twice-a-day cardio sessions on machines so there was no risk of injury. New York Times, "Serena Williams ‘on the Right Track’ at the French Open," 29 May 2018 Nothing but boxing is as efficient at getting my heart rate up and pushing my cardio limits in such a short amount of time. Andrea Pitzer, Outside Online, "I (Kinda) Hate Running," 9 July 2019 Appealing to vacationers of every stripe, an all-inclusive stay goes beyond unlimited food and drinks with a daily roster of activities from martial arts classes and beach bocce ball to cardio kickboxing, poolside games and early morning runs. Melanie Reffes, USA TODAY, "After Hurricane Irma, St. Martin resorts have rebuilt to become bigger and better," 2 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cardio.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of cardio


1984, in the meaning defined above


1991, in the meaning defined above

Keep scrolling for more

Learn More about cardio

Statistics for cardio

Look-up Popularity

Time Traveler for cardio

The first known use of cardio was in 1984

See more words from the same year

Keep scrolling for more

More Definitions for cardio



English Language Learners Definition of cardio

US, informal : any type of exercise that causes the heart to beat faster and harder for a period of time


car·​dio | \ ˈkärd-ē-(ˌ)ō How to pronounce cardio (audio) \

Medical Definition of cardio

 (Entry 1 of 2)

: cardiovascular sense 2 cardio exercises worked out on cardio machines



Medical Definition of cardio (Entry 2 of 2)

: cardiovascular exercise 30 minutes of cardio daily

Comments on cardio

What made you want to look up cardio? Please tell us where you read or heard it (including the quote, if possible).


of or relating to the heavens

Get Word of the Day daily email!

Test Your Vocabulary

Summer 2019 Words of the Day Quiz

  • a-bowl-of-peach-sorbet-with-cut-peaches-next-to-it
  • Which is a synonym of desideratum?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Syn City

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!