My wife likes to run. Lots of early mornings, she will jog around the neighborhood multiple times. Or, depending on the weather - she will go run at a local gym. She has participated in 5K's and half-marathons over the years. Yet, she didn't start her running with a half-marathon. You can't just jump into these things (unless you are a physical freak)It takes time, practice, and training to build up to a level of doing longer and longer races. The first time she ran she didn't run 13 miles. It took some training to prepare for that kind of race. Athletes know to be ultimately successful, they have to train and practice daily. The only way to get better is by daily repetition. Honing one's skills and techniques is important if they want to be successful. It also requires focus and dedication on your craft, to the exclusion of other things. "I have fought the good fight. I have finished the race, I have kept the faith" 2 Timothy 4:7 Paul, here, explains ...