Antagonistic muscle pairs

• Muscles work together in antagonistic muscle pairs
• When one muscle contracts the other relaxes
• What is the agonist?

  muscle that contracts
• What is the antagonist?

  muscle that relaxes
• Give 4 antagonistic muscle pairs

  • gastrocnemius and tibialis anterior
  • quadriceps and hamstrings
  • biceps and triceps
  • hip flexors and gluteus maximus