Question

isometric exercise strengthens muscles without ________.
a. contracting muscle fibers
b. changing muscle length
c. burning calories
d. conscious effort

please select the best answer from the choices provided.

a
b
c
d

Explanation:

Isometric exercise is defined as muscle contraction where the muscle generates force without undergoing a change in its length. Option A is incorrect because isometric exercises do involve contracting muscle fibers. Option C is wrong as all muscle activity, including isometrics, burns calories. Option D is incorrect since isometric exercises require conscious effort to hold the muscle contraction.

Answer:

B. changing muscle length