As a human, you have the racial feature of Adrenaline. If your character is taken below 25% health, your Adrenaline kicks in. 

While fueled with Adrenaline you gain a +2 to Strength (max of 20) and a +2 to Dexterity (max of 20). You gain advantage on Constitution saving throws and advantage on mainting concentration. Lastly, your movement is increased by 5 feet.

When your Adrenaline ends (health greater than 25%) you will take 1 point of exhaustion. Your exhaustion can be recovered after resting.