FITIV provides a range of Training Load (TL) methods to help users track the intensity of their workouts and tailor their approach based on their activity. This guide explains the four main methods —Perceived Effort (PE), TRIMP, TSS, and All Day Calorie Burn—and shows how each method works, along with its pros, cons, and when to use it. Whether the focus is on endurance, strength, or overall activity, FITIV offers flexible tools to suit different training needs.
Why Training Load Methods Matter
Selecting the appropriate method to measure Training Load (TL) ensures accurate tracking of how much stress workouts place on the body. Each method captures different aspects of workout intensity, allowing users to tailor their approach based on their specific training style and goals.
When a specific Training Load method is selected, it directly affects the Training Load summary and the way data is displayed in the Training Load Status and Training Load Chart. Depending on the method chosen the app recalculates the user’s Training Load and reflects these changes in the summary view.
Related content: For more detailed information on Training Load, refer to the Guide: Mastering Training Load (TL).
The Different Training Load Methods
Here’s a breakdown of the different Training Load methods available in FITIV, with an explanation of how each one works, its pros and cons, and guidance on when to use it.
Session Perceived Effort (PE)
- Variables & Formulas: Rate workout difficulty on a scale of 1 to 10, multiply by workout duration to get Effort Minutes.
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Pros:
- Simple to use across all workout types
- Personalized to individual effort
- Suitable for both cardio and strength workouts
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Cons:
- Subjective, influenced by mood or external factors
- Less consistent over time compared to objective methods
When to Use It: Best for any workout type, especially when heart rate or power data is unavailable. Ideal for quick, simple tracking.
Pro Tip: For the Perceived Effort method, FITIV provides an estimated effort value based on heart rate. These estimates will adjust over time as data is input, leading to more accurate Training Load tracking.
TRIMP (Training Impulse)
- Variables & Formulas: Heart rate relative to maximum heart rate. Greater weight is given to time spent at higher intensities.
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Pros:
- Objective, heart rate-based measure
- Scales well across sessions
- Ideal for cardio activities
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Cons:
- Less effective for strength training or short intervals
- Requires accurate heart rate monitoring
When to Use It: Best for cardio workouts like running, cycling, or swimming, where heart rate reflects workout intensity.
TSS (Training Stress Score)
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Variables & Formulas:
Uses power (from running or cycling) or heart rate when power data isn’t available. -
Pros:
- More precise for endurance sports
- Tracks power and heart rate data
- Provides detailed measurement for endurance
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Cons:
- Requires power data from sensors (Apple Watch, etc.)
- Not ideal for strength or non-endurance workouts
When to Use It: Best for endurance athletes (runners, cyclists) using power meters or heart rate monitors for detailed performance tracking.
All Day Calorie Burn
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Variables & Formulas:
Total calories burned throughout the day, including workouts, steps, standing, and general activity. -
Pros:
- Broad view of daily energy output
- Useful for tracking overall activity levels and calorie goals
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Cons:
- Does not directly measure workout intensity
- Less useful for high-intensity workouts that don’t burn many calories
When to Use It: Best for tracking overall activity and daily calorie burn, but less specific for measuring workout intensity.
Choose the Method That Fits Your Training Goals
Each Training Load method in FITIV offers a unique way to measure workout intensity, and the best method depends on the user’s fitness routine and goals. Whether simplicity is preferred through Perceived Effort, precision is needed via TRIMP or TSS, or a broader view of overall activity through All Day Calorie Burn, FITIV provides tools to support a tailored and effective training approach.
Understanding the pros and cons of each method allows users to make informed decisions about how to measure their training and stay on track toward achieving their fitness objectives.
- The FITIV Support Team