Heart of A Champion - I chose this motivational song because it's about giving your all especially when you feel like you can't go on. If you workout or play any type of physical sports for that matter, you know that you grow the most when you push yourself past the point where your body says you can't go on.
It's the ability to push for that last rep, endure that last mile, go all out for 1 more minute... that makes a champion. Champions aren't born, they're made through intense desire and willingness to keep going even when they feel like they have no more to give. So, what's your heart made of?