14 June 2026 · 5 min read
What a physiology test actually tells you (and what it doesn't)
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A physiology test is a snapshot. Done well, it gives you objective markers — thresholds, efficiency, the point where the wheels start to come off — and turns them into training zones you can actually use. Done badly, or read without context, it can send you chasing the wrong numbers.
What the numbers are good for
Setting accurate zones, tracking change over a season, and checking that training is doing what you intended. The value isn't the single number; it's the trend, and the decisions it informs.
The test doesn't coach you. It just gives the coach a sharper place to start.
Where the limits are
One test can't capture a bad night's sleep, a stressful week, or how you'll actually feel on race day. That's why testing supports coaching — it doesn't replace the conversation, the consistency, or the judgement that surrounds it.
Want this applied to your own training? Get in touch about coaching.