Atria would be empty during the atrial diastole.
The correct answer is D. Your muscles are burning. If you are experiencing any of the other 3 choices, either you probably have asthma, or you just held your breath during sprints.
Always think better. For example think of it this way, you may not be alive tomorrow, appreciate what you have.
Also you can just do what you want, once you die, you cant do the things you wanted.
A) Skinfold test is the test that uses calipers to assess body composition.
