How do you get big chest?

Exercise.

You can do some basic workouts to improve your chest muscles. They are: Bench Press Dumbbell Press Dumbbell Fly's If you workout your chest twice a week and eat proper protein in your diet you...

Sometimes used for swimming or used for sliding down hill instead of waddling down the hill because of the chance of falling :) hope I helped! :D

55 inches

Not entirely sure if this is 100% correct, but because they have larger lungs so that they can run faster without getting tired and out of breath as easily when they are chasing their prey.