Answer:
isometric
Explanation:
There are many ways in which a muscle can generate force.
One of these ways is isometric contraction. Isometric contraction can be described as a situation in which a muscle is activated but it neither lengthens neither shortens. The length of the muscle doesn't change in such type of muscle contraction although force is applied.
In the above scenario, as the small cheerleader tries to lift the heavy linebacker, his muscles are generating force but the muscles are nether lengthening or shortening. Hence, it is an example of isometric muscle contraction.
