Muscle Physiology Quiz

Questions and Answers

What is defined as the maximal force generated in a single contraction at a specified velocity?

Maximum voluntary isometric contraction

Strength for dynamic movements

Strength for isotonic contractions

Muscular power (correct)

What is the ability of a muscle group to exert submaximal force for extended periods?

Muscular agility

Muscular acceleration

Muscular strength

Muscular endurance (correct)

When there is no visible movement at the joint, the contraction is called?

Isometric (correct)

Auxotonic

Isokinetic

Concentric

How long should a client squeeze the handle of a dynamometer during a grip endurance test?

1 minute Signup and view all the answers

The V-sit test can be used to assess the isometric endurance of the?

Trunk flexors Signup and view all the answers

What is the purpose of the side bridge test?

Test the isometric endurance of the lateral flexors Signup and view all the answers

Which of the following is NOT a disadvantage of using free weights for testing dynamic muscle strength?

Have smaller weight increments to measure strength more accurately Signup and view all the answers

Which of the following is NOT a tip from the NSCA for spotting free weight exercise?

It is permissible for the spotter to be weaker and shorter than the client Signup and view all the answers

In dynamic exercise, which term describes a contraction where the muscle shortens while generating force?

Concentric contraction Signup and view all the answers

Which test evaluates the flexibility and strength of the hip flexors?

Sit and reach test Signup and view all the answers

What does the ACSM recommend for assessing upper body strength?

Bench press Signup and view all the answers

Which exercise is recommended by ACSM for lower body strength assessment?

Leg press Signup and view all the answers

What is the recommended increase in weight for upper body exercises during 1-RM testing?

5% to 10% Signup and view all the answers

Which test does the ACSM recommend for assessing upper-body endurance?

Push-up Signup and view all the answers

The difference in strength between the right and left sides of the body should ideally not exceed what percentage?

15% Signup and view all the answers

What test is included in the Senior Fitness Test battery for assessing lower-body strength?

30-second chair stand Signup and view all the answers

What is the procedure recommended for 1-RM testing of children?

Perform 6 reps with a light load Signup and view all the answers

For lower-body exercises, what weight increase is recommended during 1-RM testing?

10% to 15% Signup and view all the answers

What is the key focus of the Sahrmann Core Stability Test?

Maintaining lumbopelvic stability Signup and view all the answers

What is the ACSM's recommendation regarding the acceptable strength difference between limbs?

15% Signup and view all the answers

Study Notes

Muscle Contraction and Endurance

Maximal force in a single contraction at a specified velocity is termed muscular power.
The ability of a muscle group to exert submaximal force over extended time is known as muscular endurance.
When there is no joint movement during a contraction, it is referred to as an isometric contraction.

Grip and Core Endurance Tests

For a grip endurance test with a dynamometer, the handle should be squeezed for 1 minute.
The V-sit test assesses the isometric endurance of trunk flexors.
The side bridge test evaluates the isometric endurance of lateral flexors.

Free Weights and Strength Testing

Disadvantage of testing dynamic muscle strength with free weights includes needing greater spotting for safety; however, free weights do not have smaller accurate weight increments.
Tips for spotting include using a power rack for overhead exercises and maintaining a stable base, while being weaker or shorter than the client is not permissible.

Strength Assessment Recommendations

The American College of Sports Medicine endorses the bench press for upper body and the leg press for lower body strength assessments.
During 1-RM testing, recommended weight increases are 5-10% for upper body and 10-20% for lower body exercises.
For upper body endurance, the ACSM suggests using the push-up test.

Core Stability and Balance

The Sahrmann Core Stability Test requires movements while maintaining lumbopelvic stability in a neutral position.
Strength differences between the right and left body sides should not exceed 15%.
The Senior Fitness Test for older adults includes the biceps curl for upper body strength and the 30-second chair stand for lower body strength.

1-RM Testing in Children

For 1-RM testing in children, guidelines recommend performing 6 reps with a light load and 3 with a heavier load prior to testing, stressing the importance of safety in strength assessments.

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Description

Test your knowledge on key concepts in muscle physiology, including definitions and differences between strength, endurance, and contraction types. This quiz covers fundamental terms that are essential for understanding how muscles function in various scenarios.