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Welcome to Issue 14 of the Nutrition Authority Newsletter.

A sports nutrition practitioner is working with an athlete aiming to improve body composition.

The plan is detailed.

• precise macronutrient targets
• structured meal timing
• specific food choices
• supplementation included

On paper, everything looks optimal.

But in practice, adherence is inconsistent.

The athlete struggles to follow the plan day to day.

Progress becomes unpredictable.

This is a common challenge in applied sports nutrition.

And it raises an important question:

Why do more detailed nutrition plans often produce worse results?

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Applied Case Scenario

A practitioner is supporting a recreational athlete aiming for fat loss.

The initial plan is comprehensive:

• calorie targets set precisely
• macronutrients tightly controlled
• meal timing structured
• food choices prescribed

The athlete starts well, but over time:

• adherence drops
• meals become inconsistent
• tracking becomes sporadic

Progress slows.

The practitioner responds by refining the plan further.

But complexity increases.

Eventually, a different approach is taken.

The plan is simplified:

• fewer rules
• flexible meal structure
• focus on key behaviours
• reduced tracking demands

Adherence improves immediately.

Progress resumes.

The difference was not better science.

It was better application.

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The complexity trap in sports nutrition

Practitioners often equate:

• more detail
• more structure
• more precision

with better outcomes.

But in practice, complexity introduces:

• cognitive load
• decision fatigue
• reduced adherence
• increased variability

A plan that cannot be followed consistently is not an effective plan.

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Complex plans increase friction.
Simple plans improve adherence, clarity, and consistency.

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Why simplicity works

Simpler plans:

• reduce cognitive demand
• improve consistency
• allow clearer feedback
• increase long-term adherence

They also make it easier to:

• identify what is working
• adjust when needed
• maintain behaviours under stress

Simplicity does not mean less effective.

It often means more usable.

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Mechanism Spotlight — Issue 14

Mechanism: Cognitive Load and Decision Fatigue

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What this mechanism actually is

Cognitive load refers to the mental effort required to follow a plan.

As complexity increases:

• decision-making becomes harder
• adherence becomes less consistent
• fatigue accumulates

Over time, this leads to reduced compliance.

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How it appears in practice

Athletes may:

• skip meals or deviate from plans
• struggle to track accurately
• feel overwhelmed by detail
• disengage from the process

This is often misinterpreted as lack of discipline.

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Common practitioner mistake

Responding to poor adherence by increasing structure and control.

This often makes the problem worse.

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What changes when simplicity is prioritised

When plans are simplified:

• adherence improves
• behaviours stabilise
• feedback becomes clearer
• progress becomes more consistent

The system becomes easier to manage.

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Key takeaway

A simpler plan that is followed beats a perfect plan that is not.

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Science → Practice

Behavioural science consistently shows that:

• simpler systems are more sustainable
• reduced complexity improves compliance
• consistent behaviours outperform optimal but inconsistent ones

In practice, this means:

Effectiveness is determined by execution, not design.

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Applied Practice Takeaways

• Simplify before you optimise
• Reduce the number of rules in a plan
• Focus on high-impact behaviours
• Match plan complexity to athlete capacity
• Prioritise adherence over precision

Better outcomes come from plans that can actually be followed.

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Your challenge this week

Review one current nutrition plan you are using.

Ask yourself:

• Where is unnecessary complexity being introduced?
• What could be removed without reducing effectiveness?
• Would a simpler version improve adherence?

Often, improvement comes from subtraction.

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A principle worth keeping

A plan is only as good as its execution.

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Coming next — Issue 15

In Issue 15, we will explore how experienced practitioners identify which details matter — and which can be ignored.

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To better practice,
​Dr Laurent Bannock