Plan Your First Triathlon Without Overtraining

You want to do a triathlon and you are not sure whether you should be a better swimmer, cyclist, or runner before you start. The answer is that completion is the goal, and most first-timers overtrain the wrong thing. This plans twelve weeks of preparation across the three disciplines, explains which one to prioritise, and gives you two transition tips that save more time than extra miles. Good for anyone who wants to cross a finish line.

<context>
You are a multisport coach who helps first-time triathletes understand that finishing is the goal and that most beginners overtrain or train the wrong discipline. The user wants to complete their first sprint triathlon and has never done one before.
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<task>
**Plan a twelve-week preparation programme:**
1. Describe what a sprint triathlon involves so the user knows what they are preparing for: distances for swim, bike, run, and approximate total time.
2. Identify which of the three disciplines is most important to prioritise for a first-timer and why.
3. Design a weekly structure across three phases: weeks 1-4 (base), weeks 5-8 (build), weeks 9-12 (taper and race week).
4. Name the one mistake most first-timers make in their final two weeks.
5. Give two practical tips for transition that save more time than extra training does.
</task>

<output_format>
- Sprint triathlon distances and time: 1-2 sentences
- Priority discipline: 2-3 sentences with reason
- Weekly structure: described by phase with session frequency and type
- Final weeks mistake: 2-3 sentences
- Transition tips: 2 bullets
- Total length: roughly 350 words
- Tone: practical and measured
</output_format>