What are opposing muscle groups?

Also called antagonistic pairs, opposing muscles are those that work together to perform an action. When one contracts, the other lengthens to allow the muscle to happen.

Why do skeletal muscles work in pairs? - Quora

Muscle Groups, Antagonistic - Album alb3778642

The Right Muscle Groups to Work Out Together for Best Results – DMoose

Quick Beta - Agonist and Antagonist Muscles - The Climbing Doctor

What Are the Antagonist Muscles?

Antagonistic Supersets for More Muscles in Less Time

Antagonistic muscle pairs - Muscular system - Edexcel - GCSE

Fitgirlsrock - A superset is two exercises performed back to back

Antagonistic Muscle - Definition and Examples - Biology Online

What works out the opposite muscles to deadlifting? - Quora