You are lying on the floor with your feet flat and your knees up practicing your abdominal crunches. You raise your upper body to the ceiling, up and down. What muscles are you using to the greatest extent?
A) diaphragm
B) rectus abdominus
C) pectoralis major
D) internal intercostals
E) transverse abdominis

Question

Quizplus · Accepted Answer

The Answer of You are lying on the floor with your feet flat and your knees up practicing your abdominal crunches. You raise your upper body to the ceiling, up and down. What muscles are you using to the greatest extent?
A) diaphragm
B) rectus abdominus
C) pectoralis major
D) internal intercostals
E) transverse abdominis

You Are Lying on the Floor with Your Feet Flat