Fatigue is a subjective measure of physical and mental tiredness that can influence performance, recovery and injury risk. A simple 0–10 fatigue score helps professionals monitor readiness, identify trends and adjust training or assessment decisions.
A client arrives feeling “flat”, struggling to complete their usual warm-up and reporting heavy legs. Their strength and mobility haven’t changed significantly, but their output is clearly reduced. Before assuming a physical limitation, it is useful to capture a fatigue score to understand their current state.
Fatigue can accumulate from training, poor sleep, stress, illness or life demands. Tracking it helps provide context for performance and supports better decision-making.
Test name: Fatigue
Also known as: Fatigue score, perceived fatigue rating
Purpose: To monitor tiredness, recovery and readiness
What it assesses: Self-reported physical and mental fatigue
Equipment: Measurz, MAT or tracking system
Score: 0–10 scale
Best used with: Sleep, stress, mood, soreness and training load
Key limitation: Subjective and influenced by multiple factors
Fatigue is a state of reduced physical and/or mental capacity. It can present as tiredness, lack of energy, reduced motivation, slower reaction time or decreased performance.
Fatigue may be:
Physical (muscle tiredness, reduced strength or endurance)
Mental (difficulty concentrating, reduced focus)
General (overall lack of energy or motivation)
It is a normal response to training and life demands, but excessive or prolonged fatigue may affect recovery and performance.
Fatigue tracking helps professionals:
Monitor recovery status
Adjust training load and intensity
Identify overreaching or under-recovery trends
Provide context for performance changes
Support communication with clients
The fatigue score measures perceived fatigue.
It reflects how tired or energised the client feels at a given time.
It does not measure neuromuscular fatigue directly, diagnose medical conditions or replace objective performance testing.
Athletes, active individuals, rehabilitation clients, shift workers, students and anyone managing training or life load.
Measurz or MAT
Consistent 0–10 fatigue scale
Optional notes for context
Ask the client:
“On a scale from 0 to 10, how fatigued do you feel today?”
0 = no fatigue, fully energised
10 = extreme fatigue, unable to perform
Encourage the client to consider:
Physical tiredness
Mental fatigue
Motivation levels
Overall energy
Record the score at a consistent time (e.g. morning or pre-session).
Low fatigue (0–3):
Client feels fresh, recovered and ready
Moderate fatigue (4–6):
Typical training or life-related tiredness
High fatigue (7–10):
May suggest reduced readiness, under-recovery or accumulated load
Interpret relative to baseline. A score of 6 may be normal for one client but high for another.
Fatigue is most meaningful when tracked over time and compared with:
Sleep
Stress
Mood
Performance metrics
No high-quality universal normative values exist for a simple 0–10 fatigue score.
Fatigue should be interpreted using individual baseline and trends.
Validated tools such as fatigue severity scales exist but are less practical for daily monitoring.
Single-item fatigue scores are practical and widely used in sport and wellness monitoring.
They provide useful trend data but are subjective and influenced by context.
Inconsistent question wording
Recording at different times each day
Ignoring contributing factors (sleep, stress, illness)
Overinterpreting a single score
Comparing between individuals
Fatigue can be influenced by:
Sleep quality and duration
Training load
Stress
Nutrition
Illness
Travel
Adjust session intensity based on fatigue
Monitor recovery during training blocks
Identify overreaching trends
Support return-to-training decisions
Improve communication with clients
Record:
Fatigue score (0–10)
Timing (morning, pre-session)
Notes if relevant (e.g. “poor sleep”, “heavy training week”)
Compare with:
Sleep
Stress
Mood
Performance results
Track trends over time rather than reacting to single values.
Sleep
Stress
Mood
Training load
Soreness
Pain score
There is no universal normal value. Use the client’s baseline and trends.
Yes, daily tracking provides the most useful insight into trends.
Yes, fatigue can reduce strength, endurance, coordination and decision-making.
Common causes include poor sleep, high training load, stress, illness and inadequate recovery.
No. Fatigue is overall tiredness, while soreness refers to muscle discomfort.
Fatigue is a simple but important wellness measure.
Use a consistent 0–10 scale.
Interpret trends rather than single scores.
Combine fatigue with sleep, stress and mood for better insight.
Smets, E. M. A., et al. (1995). The Multidimensional Fatigue Inventory. Journal of Psychosomatic Research, 39(3), 315–325.
Enoka, R. M., & Duchateau, J. (2016). Translating fatigue to human performance. Medicine & Science in Sports & Exercise, 48(11), 2228–2238.
