noun
cardio
KAH-dih-oh
noun
1
Exercise that raises the heart rate, such as running or cycling.
"She does thirty minutes of cardio before lifting weights."
adj
1
Relating to the heart and circulatory system.
"He's working on his cardio fitness ahead of the marathon."
How to Use Cardio
Learner’s notesIn plain EnglishExercise meant to get your heart pumping, like running, cycling, or swimming.
Common pairings
cardio workout
do cardio
Word Forms
cardios plural
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She does thirty minutes of _____ before lifting weights.
Etymology
A shortened form of "cardiovascular."