The more you proceed, overcoming the obstacles, the more your self-confidence increase.
Getting ready is dedication and commitment
When you decide to do a Spartan Race, you have already subscribed to the fact you will need to put the work in to stay motivated and continue to build motivation into the process. However, there is something to be said about being dedicated. Dedication requires effort. You need to make time to train. You have to push through challenges. You need to stay on track and build on your efforts to improve. All of this requires dedication, not luck.