1.1.9 Muscle contraction types

• In a concentric contraction, the muscle shortens
• Isometric contractions result in a change in muscle length.

  False
• Lowering a weight slowly during a bicep curl is an example of an eccentric
• How many types of muscle contraction are there according to the study material?

  Three
• Concentric contractions increase muscle length.

  False
• What is the defining characteristic of isometric contractions?

  No change in length
• In isotonic contractions, the muscle either shortens during a concentric
• Lowering a weight during a bicep curl involves an eccentric contraction.


  True
• Muscle contraction refers to the activation of muscles to generate force
• In an eccentric contraction, the muscle lengthens while generating force.


  True
• What does muscle contraction refer to?

  Activation to generate force
• What happens to muscle length during an eccentric contraction?

  Increases
• Give an example of a concentric contraction.

  Lifting a weight
• Holding a plank is an example of an isometric contraction.


  True
• Lifting a weight during a bicep curl is an example of a concentric
• What happens to muscle length during an eccentric contraction?

  It lengthens
• Match the contraction type with its action:

  Isotonic ↔️ Changes muscle length

  Isometric ↔️ Generates force without length change
• Order the steps in performing a bicep curl with correct contraction types:

  1️⃣ Start with arm fully extended

  2️⃣ Lift the weight using a concentric contraction

  3️⃣ Lower the weight slowly using an eccentric contraction

  4️⃣ Repeat the process
• What happens to the muscle length during a concentric contraction?

  Decreases
• What is the change in muscle length during an isometric contraction?

  No change
• Isotonic contractions are characterized by a change in muscle length
• What happens to the muscle length during an eccentric isotonic contraction?

  Increases
• Match the contraction type with its example:

  Concentric ↔️ Lifting a weight

  Eccentric ↔️ Lowering a weight slowly

  Isometric ↔️ Holding a plank
• The key difference between isotonic and isometric contractions is the change in muscle length
• Muscle contraction refers to the activation of muscles to generate force
• What is an example of a concentric contraction during exercise?

  Lifting a weight
• Match the contraction type with its definition:

  Concentric ↔️ Muscle shortens while generating force

  Eccentric ↔️ Muscle lengthens while generating force

  Isometric ↔️ Muscle remains constant length while generating force
• Concentric isotonic contractions result in a decrease in muscle length.

  True
• In isometric contractions, there is no change in muscle length
• Pushing against a wall is an example of an isometric contraction.


  True
• What happens to the muscle length during an isometric contraction?

  Remains constant
• Arrange the types of muscle contractions based on their definitions:

  1️⃣ Concentric: Muscle shortens while generating force

  2️⃣ Eccentric: Muscle lengthens while generating force

  3️⃣ Isometric: Muscle remains constant length while generating force