Mental Stamina for 95 Minutes

The LNAT Section A is not just an intellectual challenge — it is a test of sustained concentration. Ninety-five minutes of continuous, high-stakes reading and reasoning is mentally exhausting. Many candidates perform well on the first 6–7 passages but see their accuracy decline sharply in the final third. This lesson addresses the mental stamina challenge and provides practical strategies for maintaining peak performance throughout.

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The Fatigue Curve

Research on sustained cognitive performance shows a predictable pattern:

Phase	Time (approximate)	Cognitive State
Warm-up	0–15 minutes	Getting into the rhythm; may feel slightly nervous
Peak performance	15–50 minutes	Fully engaged; highest accuracy and speed
Early fatigue	50–70 minutes	Concentration begins to waver; more effort required to maintain focus
Late fatigue	70–95 minutes	Significantly reduced concentration; higher error rates; decision fatigue

The critical insight is that the last 25 minutes of Section A are the hardest, not because the passages are more difficult, but because your brain is tired. You will encounter 3–4 passages during this period, worth 10–15 marks. If fatigue causes you to lose even half of those marks, it could be the difference between a competitive score and a disappointing one.

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Understanding Decision Fatigue

Decision fatigue is the deterioration in the quality of decisions made after a long session of decision-making. By the time you reach passage 9, you have already:

• Made ~30 multiple-choice decisions
• Read ~6,000–7,000 words of argumentative text
• Evaluated ~120+ answer options
• Made dozens of micro-decisions about pacing, flagging, and guessing

Each decision depletes a finite mental resource. The result is that your later decisions are more likely to be:

• Impulsive — choosing the first plausible option without evaluating alternatives
• Avoidant — flagging questions rather than committing to an answer
• Default-biased — sticking with your initial impression even when evidence suggests otherwise

Key Principle: Decision fatigue is not a matter of willpower. It is a neurological phenomenon. The solution is not to "try harder" — it is to manage your mental resources strategically.

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Strategy 1: Micro-Breaks Between Passages

You cannot take a formal break during Section A, but you can take micro-breaks — brief mental pauses of 10–15 seconds between passages.

What a Micro-Break Looks Like

After completing a passage's questions, before moving to the next passage:

1. Close your eyes for 5 seconds
2. Take two slow, deep breaths
3. Relax your shoulders and unclench your jaw (many people tense up without realising)
4. Briefly look away from the screen — focus on something at a distance to rest your eyes
5. Reset mentally — the previous passage is done; it does not matter how well or poorly it went

Why This Works

Micro-breaks:

• Reduce eye strain from continuous screen reading
• Lower physiological stress markers (heart rate, muscle tension)
• Provide a psychological "reset" that prevents errors on one passage from cascading into the next
• Cost only 10–15 seconds per passage (approximately 2 minutes total across 12 passages — a worthwhile investment)

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Strategy 2: Manage Your Physical State

Your mental stamina is directly affected by your physical state. Small physical adjustments during the test can make a significant difference.

During the Test

Physical Factor	Problem	Solution
Posture	Slouching reduces blood flow to the brain and increases fatigue	Sit upright; adjust your chair before the test starts
Hydration	Dehydration impairs concentration within 1–2 hours	Drink water before the test (check whether water is allowed at the testing station)
Eye strain	95 minutes of screen reading causes significant eye fatigue	Look away from the screen briefly between passages; blink deliberately
Muscle tension	Stress causes neck, shoulder, and hand tension	Stretch fingers between passages; roll shoulders
Blood sugar	Concentration drops when blood sugar is low	Eat a balanced meal 1–2 hours before the test

Before the Test

The 24 hours before the test significantly affect your performance:

• Sleep: Aim for 7–9 hours the night before. Cognitive performance is highly sensitive to sleep deprivation.
• Caffeine: If you normally drink caffeine, have your usual amount. If you do not, test day is not the time to start.
• Exercise: Light exercise (a walk, gentle stretching) on the morning of the test improves alertness and reduces anxiety.
• Arrival: Arrive early to settle in. Rushing increases stress, which depletes mental reserves before you even start.

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Strategy 3: Simplify Late-Test Decisions

As decision fatigue builds, make your decision-making process simpler:

Pre-Commit to Strategies