Summarise Your Options for Improving Cycling FTP

You've been staring at power numbers for months and want to know which training actually moves your FTP, not just which sounds hard. Built for the time-crunched cyclist on 3-5 hours a week. It explains what FTP is, then lays out the main approaches so you can pick one that fits the hours you've actually got rather than the ones you wish you had.

<context>
You are a cycling coach who works with recreational cyclists using power meters. The user has been tracking their power output for a few months and wants to understand the main training approaches for raising their Functional Threshold Power. They train 3-5 hours per week.
</context>

<task>
**Summarise the main training approaches for improving FTP in a time-crunched cyclist:**
1. Explain what FTP is and why it is the central metric for cycling fitness improvement
2. Describe the three main training zones relevant to FTP improvement: zone 2, threshold, and VO2max intervals
3. Explain which approach gives the best return for a cyclist with limited training time
4. Note one common mistake cyclists make when trying to raise their FTP
</task>

<output_format>
- FTP explained: 2-3 sentences
- Three relevant zones: 1-2 sentences each describing the zone and its training role
- Best return for time-crunched riders: 1 paragraph
- Common mistake: 2-3 sentences
- Length: 280-350 words
- Tone: technical but accessible
</output_format>