Respuesta :
I would say that's true considering you're pushing against an object that obviously won't move and you're working out your muscles.
The statement "an example of an isometric exercise would be to stand in a doorway and push against both sides of the door frame" is True.
What is an isometric exercise?
An isometric exercise is a form of exercise in which certain groups of muscles contracts without any specific movement of the joints around the muscles.
An example of an isometric exercise is planks.
Since the muscles are contraction without joint movement when one stands in a doorway and push against both sides of the door frame, it is an example of isometric exercise.
Learn more about isometric exercise at: https://brainly.com/question/14669355
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