Annual hours for your first olympic distance triathlon is based on 400 annual hours volume
this is a 38 week olympic distance triathlon training plan, starting with the preparation phase, then moving into the base training phase, then the build and finally pre competition which leads you up to your A Race.
You might be a beginning triathlete or maybe you have a couple of races under your belt from previous seasons. In either case you are fit and are NOT a beginning athlete. Before beginning Week 1 of the plan you are capable of riding a bike 30 to 60 minutes two days a week and completing a long ride around two hours on a third day. You can swim 100 yards (or meters) nonstop and swimming for 30 minutes a couple of times per week is easy. You can run two days per week, one 30-minute run and a longer run of 45 minutes.

Weekly training hours range from 5:15 to a maximum between 8:15 and 10:00. There is some flexibility built into the plan to accommodate individual differences. For example there is no time posted for the swim workouts. Obviously there can be big differences in swimming abilities between people with a competitive swim background and those just getting into swimming. Some of the run and bike workouts also have ranges built into the workouts.