im sure your body would ache because unless someone is suicidal, i would try and swim to get to the top and swimming makes you tired, just like the feeling of not making it when you know deep inside that if you try real hard...i know when i would go swimming in the summer i'd try and swim as long as i could without taking a breathe, my body ached and my head was pounding so hard.
It might hurt a little...but the feeling of knowing your going to die just isnt pleasant!