Muscles and joint actions

What is an agonist muscle

• The muscle that opposes a force

• The muscle which is applying the force

• The muscle that is not moving

• The muscle that is sore

The antagonist muscle during a knee extension is

• The quadriceps

• The biceps

• The hamstrings

• The gastrocnemius

What is this action called

• Elbow flexion

• Flexion

• Knee extension

• Shoulder rotation

What action is the bowler performing with his shoulder in this clip?

• shoulder rotation

• shoulder dorsi flexion

• shoulder pronation

• shoulder extension

An contraction where the muscles contract but don't change in length

An eccentric contraction is one where the muscle

• lengthens

• shortens

• doesn't change in length

• changes from muscle to tendon

This action is called

• pronation

• plantar flexion

• abduction

• supination

The action performed by the legs in this clip is primarily

• adduction

• abduction

• circumduction

• pronation

The majority of muscle movements performed during sports are

• Isotonic

• Isometric

• isokinetic

• isolation

If a soccer player performs a penalty kick, at the point just after the player strikes the ball, the agonist muscle in the kicking leg is the _________ and the hip joint is performing a ___________ action

• quadriceps & flexion

• hamstrings & extension

• Hamstrings & extension

• Quadriceps & rotation