A temporary reduction in physical or mental performance caused by training, activity, stress, poor sleep or other demands.
Why Fatigue matters
Tracking fatigue helps distinguish a normal short-term response from a pattern that requires reduced training or professional advice.
A practical example
A heavy training week may temporarily reduce repetitions at the same load.
Common mistake
Assuming every tired day means the programme has failed or ignoring persistent unexplained fatigue.
Keep the context in mind.
Training and nutrition terms describe general principles. The right exercise, intensity or food target still depends on your experience, health, goals and schedule.
Personalised coaching
Apply the principle to your own training.
A definition is useful, but your programme still needs to match your experience, schedule, recovery and goals.
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