Prin. Strength and Cond.

Muscle Review

• Muscles Shortening = Agonist

• Muscles Lengthening = Antagonist

• Supporting Muscles = Synergists

• Concentric Phase: Majority Shortening

• Eccentric Phase: Majority Lengthening

Open vs Closed Chain

• Open Chain Exercise: An exercise where the moving limb is acting against something that is free to move

• Closed Chain Exercise: An exercise where the moving limb is acting against something that is fixed or cannot move.

Muscles of Hip Extension

•Adductor Longus

•Pectineus

•Adductor brevis

•Anterior fibers of adductor magnus

•Gracilis

•Adductor minimus

•Posterior fibers of adductor magnus

•Semitendinosis

•Semimembranosis

•Long head of bicep femoris

•Gluteus maximus

•Posterior fibers of gluteus medius

•Posterior fibers of gluteus minimus

•Piriformis

•Obturator internus

•Gemellus internus

•Gemellus superior

•Obturator internus

•Gemellus superior

•Obturator externus

•Gemellus inferior

•Quadratus femoris

•Sartorius

Considerations for Sport

• Dominate / Operational Planes of movement

• What muscles and joint are primarily used?

  • What exercises (what at what speed) would work these muscles/joints to improve performance?

• What are common sites of injury?

  • What exercises would reduce the risk of injury

Choose a Sport

• Dominant muscles used

  • exercises to train

• Dominant planes

• Speed abilities skills

  • Ways to train them

• Potential sites for injury

  • How to train to avoid/protect potential sites

Ch.1 Structure and Function of Body Systems

Musculoskeletal System

• A motor neuron (nerve cell) and the muscle fibers it innervates are called a motor unit.

• A single motor neuron may innervate hundreds to thousands of muscle fibers.

• Each muscle fiber has only one neuromuscular junction

• All the muscle fibers of a motor unit contract together when stimulated

• The sliding-filament theory of muscular contraction states that actin filaments slide inward over myosin filaments