YOU are your biggest competitor. When you feel tired and want to quit, push because you KNOW you can do it. Today I went to a local Crossfit facility (box) and did the WOD as is or RX'd instead of modifying. Half way through, I really thought I would have to change my kettlebell weight not because I was tired but because I kept getting passed by in the workout. After taking a deep ass breathe, I exhaled and let my need to stay in front of the pack go.
How many times have you said to yourself that you are going to make it a goal to be healthier? How many times have you attempted and once you didn't see instant results, you gave up and quit?Let me ask you this....why? Why are you giving up on yourself before you even begin? Understanding that this process will not happen overnight is your first obstacle to overcome. Knowing that this is not about "losing weight", it's about a lifestyle change is obstacle 2. Most importantly, staying committed will be your BIGGEST obstacle of all.