How does the Fitness, Fatigue, and Form chart work?
In TrainerPlan, you can accurately and scientifically track the performance of your workouts. The platform allows you to quantify your training sessions using heart rate data or a power meter, providing a clear view of your fitness level over time.
Training Quantification
With Heart Rate
If you use heart rate data, commonly applied in activities like running, TrainerPlan employs an algorithm based on TRIMP (Training Impulse). This method, originally developed by Eric W. Banister in 1975, remains one of the most reliable metrics for measuring the impact of training on athletes.
With a Power Meter
For cyclists who use a power meter to measure the watts produced in each phase of training, TrainerPlan uses the method developed by Dr. Andrew Coggan. This approach considers both the duration of the training and the relative intensity compared to your functional threshold power, providing an accurate measurement of the effort expended.
Fitness Calculation
Fitness (Condition)
Fitness is an exponentially weighted average of the last 42 days of training, reflecting accumulated effort and consistency. Recent workouts have a greater impact on your fitness than older ones. As your Fitness increases, so will your Fatigue, but at a greater rate.
Fatigue
Fatigue is calculated as an exponential average of the effort of your workouts over the past 7 days. Workouts with high effort scores will significantly increase your Fatigue level, reflecting the load your body is experiencing.
Form
Form is the result of subtracting the previous day’s Fatigue from your previous day’s Fitness. A positive Form indicates that you are well-rested and ready to perform at your best, while a negative Form suggests that you are dealing with a lot of Fatigue and are not in optimal condition to compete.
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