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Welcome to Issue 09 of the Nutrition Authority Newsletter.

A sports nutrition practitioner working with a strength athlete encounters a familiar situation.

Body composition progress has stalled.

The athlete reports strong adherence to the nutrition plan, training load is consistent, and sleep appears stable.

The instinctive response might be to adjust the programme:

• reduce calories
• increase protein
• introduce refeeds
• adjust training volume

But experienced practitioners often pause before making another adjustment.

Because in applied sports nutrition, the most important question is rarely:

What intervention should I apply?

Instead, it is:

How should I think about this problem?

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Applied Case Scenario

A practitioner supporting a professional rugby player receives a familiar report.

Despite following the fuelling plan closely, the athlete reports inconsistent energy during training.

The practitioner initially considers:

• adjusting carbohydrate intake
• modifying meal timing
• introducing additional supplementation

But before making changes, they step back and review the broader system.

Recent travel had disrupted sleep.

Training intensity had increased following a return from injury.

The athlete had also increased caffeine intake to manage fatigue.

The apparent fuelling issue was actually a recovery capacity issue.

The correct intervention was not nutritional optimisation.

It was recovery management.

This is where decision frameworks become valuable.

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Why decision frameworks matter

In complex environments like sport, practitioners constantly face uncertainty.

Without a framework, decisions are often driven by:

• instinct
• habit
• protocol repetition
• reactive adjustments

Decision frameworks provide structure to thinking.

They help practitioners determine:

• what problem they are actually solving
• which variable matters most
• which intervention should come first

Frameworks do not remove uncertainty.

They make it manageable.

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Decision frameworks help practitioners move from symptoms to constraints before selecting interventions.

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Mechanism Spotlight — Issue 09

Mechanism: Cognitive Bias in Practitioner Decision-Making

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What this mechanism actually is

Human decision-making is vulnerable to cognitive biases.

Practitioners may unconsciously favour explanations that align with their existing expertise.

For sports nutritionists, this often means interpreting problems through a nutritional lens.

This can lead to over-attributing performance challenges to:

• carbohydrate intake
• hydration strategy
• supplementation
• macro distribution

Even when the true constraint lies elsewhere.

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How it appears in practice

Examples include:

• repeatedly adjusting macronutrient targets without considering recovery
• assuming fatigue must be related to fuelling
• adding supplements before examining training load or sleep

These patterns are rarely due to lack of knowledge.

They arise from how humans process complex information.

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Common practitioner mistake

Attempting to solve every problem within one’s own domain of expertise.

When the real constraint lies outside that domain, progress stalls.

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What changes when you recognise it

Decision frameworks encourage practitioners to step back and assess the entire system.

They promote questions such as:

• What constraint currently limits progress?
• What variable has the greatest leverage?
• What intervention will most likely influence the system?

This approach reduces bias and improves clarity.

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Key takeaway

Frameworks improve decisions by slowing premature intervention.

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Science → Practice

Research in decision science consistently shows that structured reasoning improves judgement under uncertainty.

In practice, this means:

Practitioners who rely solely on intuition are more vulnerable to bias.

Practitioners who use frameworks make more consistent and reliable decisions.

Science informs the mechanisms.

Frameworks guide the application.

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Your challenge this week

Think about a recent client or athlete case.

Ask yourself:

• What problem did I assume I was solving?
• What framework guided my thinking?
• Would another practitioner have approached the situation differently?

Improving professional judgement often begins with examining our own assumptions.

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A principle worth keeping

Good practitioners know interventions.

Great practitioners design decisions.

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Coming next — Issue 10

In Issue 10, we will explore how practitioners can identify high-leverage interventions that create disproportionate improvements in athlete outcomes.

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To better practice,
​Dr Laurent Bannock