Antagonistic Muscle Pairs: Definition and Examples (Biceps/Triceps, Quads/Hamstrings)

Definition

Antagonistic pair: two muscles that work in opposition; one contracts while the other relaxes, enabling precise, controlled movements.

Examples

  • Biceps and triceps (elbow flexion/extension)
  • Quadriceps and hamstrings (knee extension/flexion)
  • Gastrocnemius and tibialis anterior (ankle plantarflexion/dorsiflexion)
  • Deltoids and pectoralis major (shoulder abduction/adduction)

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