Adrenaline. The hormone adrenaline makes your heart and lungs work faster, which sends more oxygen to your major muscles. As a result, you get a temporary boost of strength.

Does adrenaline boost your strength?

"The release of adrenaline," said Lynch, who has researched the chemical pathways that influence muscle strength, "promotes blood flow to working muscles, speeds metabolism and enhances the capacity for muscles to contract with more force and power than what we might normally require to perform most of the tasks we ...

Does adrenaline make you not feel pain?

The release of adrenaline helps increase your mental concentration. It doesn't take the pain away, rather it distracts you from the sensation of it. An adrenaline rush can heighten your abilities, making you feel invincible. This process is meant to help you overcome the situation that is causing your extreme stress.