Finding the right training program just for you can be hard--some programs may be too aggressive, some too passive and some that do not allow enough recovery for you and your body. My suggestion is to look for a program that begins your training where you currently are, not where you want to be. For example--you do not want to pick a program that puts you at a sub 2 hour finish if you currently train at a 11:00 mile per hour pace. Building up to the half-marathon distance is not just about building the muscles, bones and connective tissue to run a race of this distance, but more importantly you are working on building the energy systems (fat vs. muscle utilization). Some people find merging several programs is what works for them.
RUN HAPPY and RUN STRONG!
ACE Certified Personal Trainer, RRCA Certified Running Coach
Member of the NTX Runners, DRC, Rockwall Running Club, Plano Pacers, NYRR, Team Runnersconnect
"No weight is ever PERFECT enough to do the enormous job of CREATING happiness!" From The Don't Diet, Live-it Workbook