When giving compressions, how should you position your hands, arms, and shoulders?

Positioning your hands, arms, and shoulders correctly is critical to delivering effective chest compressions during CPR. When the arms are straight, the elbows locked, and the shoulders over the hands, it allows for maximum force to be exerted into the victim’s chest. This alignment helps to deliver high-quality compressions that are deep enough to circulate blood and are at the correct rate, which is essential for maintaining blood flow to vital organs.

Using this positioning prevents fatigue as it utilizes the body's weight more effectively, allowing the rescuer to perform compressions with less effort over time. Maintaining a straight alignment also ensures that the compressions are vertical, allowing for the chest to fully recoil between compressions, which is necessary for effective blood flow.

In contrast, other positioning methods, such as keeping the arms slightly bent or limp, can reduce the effectiveness of compressions, resulting in less force and compromised blood flow. Therefore, the recommended method of having the arms in line, straight, and shoulders over the hands is the best practice for providing lifesaving compressions.