What limits your triathlon performance? The abilities described by Joe Friel

It's possible to spend a lot of time training and still focus mainly on what you're already good at. In chapter 6, Friel seeks to shift the focus to the abilities that most affect your chosen goal.

The chapter connects two languages: that of the physiological components of performance and that of practical training categories. This bridge allows you to move away from a generic idea of conditioning and start defining what to develop.

Three components help explain performance

Aerobic capacity, presented in relation to VO₂max, describes the maximum ability to use oxygen to produce energy. Friel treats it as an important component, without reducing a race's outcome to a test value.

Lactate threshold is part of the discussion about the intensity an athlete can sustain. Within the book's reasoning, expanding the ability to work at intensities relevant to competition helps align preparation with the event's demands.

Economy describes the cost of producing a certain pace or power. Two athletes can sustain similar speeds with different demands, and part of this difference is related to movement efficiency and other characteristics.

These three components interact. The chapter also acknowledges race elements, such as pacing, nutrition, and environmental conditions, that don't fit into a single physiological indicator.

From metrics to training abilities

To turn this discussion into practical organization, Friel uses six abilities. Three are presented as basic: aerobic endurance, muscular force, and speed skills. Three others appear as advanced: muscular endurance, aerobic capacity, and sprint power.

The terminology follows the author's organization. "Speed skills," for example, doesn't just mean running or swimming very fast. It refers to the coordination and efficiency needed to move better.

Aerobic capacity appears both as a physiological component and as a training category, depending on the context. This repetition can confuse the reader; it's helpful to observe whether the author is explaining a measured characteristic or the type of session designed to develop it.

The function of basic abilities

Aerobic endurance allows you to sustain work for prolonged periods and takes up a large part of the proposed preparation. Muscular force relates to the ability to overcome resistance. Speed skills deal with the quality of movements.

In Friel's organization, these abilities form the platform for more specific work. Developing them helps create the conditions for sessions that require sustaining intensity and maintaining performance as effort accumulates.

Therefore, building the base is not presented as simply waiting before the important training begins. It contributes to the ability to benefit from subsequent work.

Advanced abilities and the race context

Muscular endurance is related to sustaining relatively demanding efforts over time. In triathlon, it receives attention for its connection to maintaining performance during the segments and to accumulated fatigue.

Aerobic capacity work brings together stimuli aimed at this dimension of conditioning. The relevance of each type of session depends on the competition, the point in the season, and individual characteristics.

Sprint power appears in the model, but Friel does not prioritize it to the same extent for the book's main context, which focuses on non-drafting triathlons. This caveat is important: tactical and competitive demands can change between race formats.

Weakness and limiter are not synonymous

This is one of the most useful distinctions in the book. A weakness is a less-developed ability. A limiter is a weakness that significantly interferes with the race or the current goal.

The analysis depends on crossing the athlete's profile with the characteristics of the competition. A difficulty may require great attention on a certain course and have relatively less importance on another.

This prevents preparation from becoming an attempt to fix everything at once. Available time is limited, and priorities must reflect what contributes most to the desired outcome.

Maintaining strengths while developing limiters

Focusing on relevant difficulties doesn't mean abandoning already developed abilities. Friel differentiates the effort of improving an ability from the work needed to maintain it.

The plan seeks to direct resources to the limiters while preserving what already works. It also recognizes that race choice can favor the athlete's characteristics, when there is freedom to select events.

When the desired competition doesn't match your strengths, the challenge includes preparing in a way that reduces this gap and having a strategy that considers the real conditions.

Editorial example: a run that loses performance

An athlete reports that their biggest difficulty is the final run. Before concluding that they simply need to run more, it's necessary to understand the context: their ability to sustain pace, the effort expended on the bike, and their technique when fatigued may all be part of the situation.

The editorial example doesn't determine the cause. It illustrates the need to formulate the question better before choosing the intervention.

The guiding idea of the chapter is to use training to change what's preventing you from reaching your goal. Knowing what you like to train is one piece of information; knowing what needs to change is another stage of planning.

Reference: FRIEL, Joe. The Triathlete’s Training Bible. 5th ed. Ch. 6, “Building Fitness”. Summarized in my own words from the English edition provided. Next article: annual planning and periodization.

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Cada um no seu ritmo. Juntos no caminho.