car·​dio | \ ˈkär-dē-(ˌ)ō \

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

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 Monday and Friday were for conditioning; Tuesday, Thursday and Saturday were for strength; Wednesday was cardio work. Rory Smith, New York Times, "The Lonely Road Back From a Very Public Injury," 20 Sep. 2017

Recent Examples on the Web: Noun

For that true world-domination feeling, bring your sweats: the gym has more machines than Equinox, and cardio machines expertly placed with views in mind. Brooke Porter Katz, Condé Nast Traveler, "23 Best Hotels in Los Angeles," 1 Mar. 2018 Unlike steady-state cardio, HIIT alternates between short bursts of all-out exertion and rest., "A cardio circuit for people who hate running," 26 June 2018 Can't grow a mustache or don't want to be put down for cardio? Taylor Mead, House Beautiful, "Tarek El Moussa Wants You To Grow A Mustache This November For The Best Reason," 6 Nov. 2018 Volunteer Park Water Tower Care for some cardio with your view? Jessica Voelker, Condé Nast Traveler, "Seattle’s Space Needle Unveils Its $100M Renovation," 2 Aug. 2018 Users can log in for instructions for cardio and strength workouts (no gym needed!), health tips and daily fitness activity tracking. April Castillo, Woman's Day, "Free Fitness Plan," 27 June 2013 The sport requires a steely combination of cardio, power, core strength, and total-body conditioning. Jenny Mccoy, SELF, "What Is Snowshoe Racing? A Look Inside the Niche and Challenging Winter Sport," 17 Oct. 2018 More than 1,200 people woke up before dawn on Sunday to do some cardio exercise in Orlando with the goal of raising awareness of diabetes. Lisa Maria Garza,, "More than 1,200 people walk, run in Orlando to raise awareness of diabetes," 24 June 2018 In general, running is outstanding cardio exercise, benefiting much of the body and tied to greater health outcomes than the general population. David G. Allan, CNN, "The infamous murderer's prison escape that inspired a near-impossible ultramarathon," 26 May 2018

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.

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First Known Use of cardio


1984, in the meaning defined above


1991, in the meaning defined above

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The first known use of cardio was in 1984

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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 \

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

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