PGHC isotonic and isometric contractions

What is the definition of isometric muscle contraction?

• Muscle generates force by increasing its length

• Muscle generates force by shortening its length

• Muscle generates force without changing its length

• Muscle generates force by staying relaxed

Give an example of an isometric muscle exercise.

• Bicep curls

• Leg press

• Sit-ups

• Plank

What is the definition of isotonic muscle contraction?

• Muscle contraction with an increase or decrease muscle length

• Muscle contraction with no change in muscle length

What is the difference between isometric and isotonic muscle contractions?

• Isometric contractions occur when the muscle generates force without changing its length, while isotonic contractions involve the muscle changing length as it contracts.

• Isometric contractions involve the muscle changing length as it contracts, while isotonic contractions occur when the muscle generates force without changing its length.

• Isometric contractions occur when the muscle generates force by changing its length, while isotonic contractions involve the muscle not changing length as it contracts.

• Isometric and isotonic contractions are the same and can be used interchangeably.

Name one benefit of isometric muscle exercises.

• Decreasing muscle flexibility

• Improving muscle strength and endurance

• Causing muscle fatigue and weakness

• Increasing risk of injury

Name one benefit of isotonic muscle exercises.

• Reduced risk of osteoporosis

• Improved cardiovascular health

• Muscle strength and endurance

• Increased flexibility

How do isometric muscle contractions differ from isotonic muscle contractions in terms of muscle length?

• Isometric muscle contractions do not change the length of the muscle

• Isometric muscle contractions have no effect on the muscle length

• Isometric muscle contractions shorten the muscle

• Isometric muscle contractions lengthen the muscle

Explain the concept of muscle tension in isometric and isotonic contractions.

• Isometric and isotonic contractions both involve the same amount of muscle tension.

• In isometric contractions, muscle tension is developed without any change in muscle length, while in isotonic contractions, muscle tension is developed with a change in muscle length.

• Muscle tension is not developed in either isometric or isotonic contractions.

• In isometric contractions, muscle tension is developed with a change in muscle length, while in isotonic contractions, muscle tension is developed without any change in muscle length.

How can isotonic muscle exercises help improve muscle strength and endurance?

• Isotonic muscle exercises involve no tension on the muscle during contraction, which helps in improving muscle strength and endurance.

• Isotonic muscle exercises only work for improving flexibility, not muscle strength and endurance.

• Isotonic muscle exercises are only effective for improving muscle strength, not endurance.

• Isotonic muscle exercises involve constant tension on the muscle during contraction, which helps in improving muscle strength and endurance.