Definition
Metabolic conditioning—high-intensity circuits designed to improve your body's energy systems and work capacity while simultaneously destroying your will to continue. Cardio's angry, violent cousin.
Example Usage
Tuesday's metcon was so brutal that three people had to sit down mid-workout, and one guy dry-heaved into the garbage can.
Origin
CrossFit abbreviation for metabolic conditioning workouts
Fun Fact
Despite the hype, traditional steady-state cardio may build aerobic capacity more effectively than metcon workouts for most people.
Source: CrossFit and functional fitness terminology
Related Terms
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