If you said Yes, then you certainly would be able. It's just as simple as that. When we face situations that are near physical or mental impossibilities, then it is our belief system, or belief in ourselves, that determines IF it is possible. Our body and minds are stronger and more complexed than most people think. We are capable of much more.
People place too many limits on what they can do.
Learning to believe in yourself and your abilities is a hard job that never ends. Although, it does get easier with time. You need to start pushing yourself. Attempting things that are just outside your ability. By putting in the time and effort you WILL succeed.