@bfrostie The true answer is… it depends!
- How much time do you have available to train per week?
- Have you completed a half distance race before?
- Can you run continuously for more than 60 minutes without pain?
- Do you need to focus more on technique, rather than distance?
- Do you have goal times in mind for each discipline and race distance?
If you are new to the half distance it would be best to build up to it by completing option 2
If you have experience in completing half distance races I would suggest option 1
If you have never used a 3:1 training cycle (3 weeks training, 1 week recovery) it would be best to choose a plan with a 2:1 training cycle.
You should always take 1-2 weeks at a minimum between training plans for additional recovery. This is often a great time to check over your equipment and establish the best place to execute your race replication efforts. Practice those nutrition strategies and within your training plan be sure to include your race day equipment. For example- Best to complete a 4DP test on the bike you will be racing for accurate numbers.