During adult CPR, which position should your elbows be in while performing chest compressions?

• A. Elbows bent at 90 degrees
• B. Elbows locked behind the back
• C. Elbows straight
• D. Elbows raised above the chest

Answer: (C)

Keeping elbows straight lets you push with your body weight in a straight line from shoulder through your hands. This alignment delivers the chest compressions with the correct depth (about 2 inches or 5 cm) and allows for consistent, quick recoil while you stay less tired. When the elbows bend, effort shifts to the arm muscles, reducing depth and tiring you faster, which makes compressions less effective. Elbows behind the back or raised above the chest disrupt the straight line of force and harm depth and control. So, the best position is with the elbows straight, shoulders over the hands, and hands on the center of the chest.