Lab 9: Strength Testing

Question 1

Isometric Muscle Contractions

Answer 1

Muscle contracts but does not change length

Question 2

Concentric muscle contraction

Answer 2

Muscle shortens during contraction

Question 3

Eccentric muscle contraction

Answer 3

Muscle lengthens during contraction

Question 4

Amount of force generated during muscle contraction depends on:

Answer 4

-Type of motor units recruited
-Number of motor units recruited
-Initial muscle length
-The nature of motor units stimulation

Question 5

Purpose of isometric strength training

Answer 5

-Ability to isolate a muscle group to determine strength/weakness
-Assess changes in strength after training program
-Assess mobility and muscle strength of individuals with orthopedic problems since PT isnt required to move an external weighted force & less dynamic strain on joints/tendons
-Measures force production