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GCSE P.E Lesson 3 Muscles

GCSE P.E Lesson 3 Muscles. HOW MUSCLES WORK (PART 1). Learning Objectives. By the end of this lesson you will understand . . . . . . How muscles work. . . . . . What ANTAGONIST, AGONIST and SYNERGISTS muscles are. How muscles work. Muscles work in pairs or groups.

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GCSE P.E Lesson 3 Muscles

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  1. GCSE P.ELesson 3Muscles

  2. HOW MUSCLES WORK(PART 1)

  3. Learning Objectives . . . By the end of this lesson you will understand . . • . . . . How muscles work. • . . . . . What ANTAGONIST, AGONIST and SYNERGISTS muscles are.

  4. How muscles work • Muscles work in pairs or groups. • This is called antagonistic muscle action. ANTAGONISTIC MUSCLE ACTION = MUSCLES WORKING IN PAIRS/GROUPS.

  5. Example 1 – biceps and triceps. • The biceps and triceps work together to flex and extend the arm.

  6. Example – biceps and triceps. • FLEXION at the elbow = • Biceps CONTRACT (shortens) • Triceps RELAX (lengthens) • EXTENSION at the elbow = • Biceps RELAX (lengthens) • Triceps CONTRACT (shortens)

  7. Always remember . . . . . . CONTRACTING = muscle SHORTENING RELAXING = muscle LENGTHENING

  8. Example 2 – Quadriceps and Hamstrings • FLEXION at the knee = • Which muscle shortens/contracts? • Which muscle lengthens/relaxes? • EXTENSION at the knee = • Which muscle shortens/contracts? • Which muscle lengthens/relaxes?

  9. Antagonist and Agonist muscles • The working muscle is the prime mover = the AGONIST. • Remember the working muscle will be tired – AGONY! • The relaxing muscle = ANTAGONIST

  10. AGONIST = Prime mover (working muscle) ANTAGONIST = Relaxing muscle

  11. AGONIST = Prime mover (working muscle) ANTAGONIST = Relaxing muscle Biceps Triceps Triceps Biceps Quadriceps hamstrings Quadriceps Hamstrings

  12. SYNERGISTS • The prime mover (main working muscle) is helped by other muscles. • These are called SYNERGISTS. • They contract at the same time as the main working muscle. • They hold the body in position so that the prime mover can work smoothly. • SYNERGISTS = A muscle that assists another muscle to accomplish a movement.

  13. DO YOU KNOW THE NEW TERMINOLOGY? ANTAGONIST? PRIME MOVER? RELAXING = ? ANTAGONISTIC MUSCLE ACTION? SYNERGISTS? CONTRACTING = ? AGONIST?

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