Answer:
what exercise?
Explanation:
i think g00gle can answer this one, i had a question similar
The body in tone and strengthens the muscles
I don't know what you have to choose from, but it has to be somewhere along the lines of your elbow bending to approximately a 90 degree angle and then straightening your arm out again. And you back, hips, waist, and posterior cannot be arched.
A, human lungs weigh around 2.2 pounds.
