Training Effect

Firstbeat Training Effect Tracks Anaerobic Training Load

Now available with the Firstbeat Sports

In today’s sports, margins between winning and losing are thin. For optimal game performance, the training needs to meet the game requirements. Coaches and athletes need to know how hard they have trained and what properties they have developed. Firstbeat has developed new Training Effect algorithms that will support your training programming and help each athlete reach the goals set for the training, both in terms of endurance capacity and repeated sprinting ability with high power.

Real-Time Monitoring

  • Monitor how hard is your training session, i.e. the overall Training Effect in real time on a  0-5 scale
  • See the aerobic and anaerobic training load evolved from warm-ups to high intensity drills during the session
  • Receive instant feedback reporting for coaches and players

Review Screenshots and Reports –>



Training Effect (TE) Scale: 0 = no effect, 1 = minor effect (recovery training), 2 = maintaining effect, 3 = improving effect, 4 = highly improving effect, 5 = temporarily overreaching effect

What’s new?

So far Training Effect has been assessed from EPOC (Excess Post-exercise Oxygen Consumption) and used mainly to describe the impacts the training is having on cardiorespiratory fitness in terms of VO2max.

With the extended algorithms Firstbeat is capable of providing information also on anaerobic components of the training load derived from high intensity interval training. Thus, with this breakthrough update, an analysis of both aerobic and anaerobic training effect helping to optimize the content of training in real-time becomes available.

What is the Training Effect based on?

The development of new Training Effect algorithms has been based on deep understanding and research of human physiology during various types of sports. The resulting algorithms behind the extended Training Effect form an intelligent and multidimensional system which is able to track both aerobic and anaerobic training effects, and the distribution between these two.

For analyzing the anaerobic training effect, the algorithms for example detect high-intensity intervals from any exercise session, and take into account properties of the intervals such as the intensity and duration as well as recovery level before intervals. The amount of anaerobic work performed is further compared to reference values of known amount of anaerobic work of different types of exercises to form a scale for training adaptions.





Energy for sports performances can be produced by the muscles by using different energy pathways. The new Training Effect feature is able to analyze both aerobic and anaerobic training and related physiological systems.

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Where is the new extended Training Effect available?

The new algorithms are fully integrated to our new Cloud based SPORTS Monitor showing aerobic/anaerobic training effect on dashboard and reports. Also the SPORTS stand alone will update to the enhanced algorithms due to revised version 4.7. week 51.

What do you mean by aerobic and anaerobic training?

In this context, aerobic refers to long duration submaximal work (endurance-type exercise) and anaerobic to repeated high-intensity maximal work i.e. interval (intermittent) exercise (power-type exercise). Aerobic training improves aerobic fitness (VO2max) i.e. ability to utilize oxygen to produce energy, ability to use fat as energy substrate, endurance and stamina. Anaerobic training improves maximal anaerobic capacity i.e. ability to produce high-levels of energy fast via lactic acid “pathway”, ability to buffer lactate and resist fatigue, and to produce high power repeatedly.

How do you define anaerobic Training Effect?

In principle, the new algorithm tracks also interval-type training. The higher the intensity, the shorter the duration, and the better the recovery level before the high-intensity anaerobic sections, the greater is the impact on anaerobic capacity and the faster the accumulation of anaerobic work. The amount of anaerobic work during the exercise is further compared to reference values of known amount of anaerobic work of different types of exercises in different sports to form a Training Effect value. As before, users with higher fitness level (or activity class) need to perform more strenuous exercise session to achieve similar Training Effect as users with lower fitness level.

Why it is important to know the distribution between aerobic and anaerobic training?

In sports training, the body’s homeostasis need to be repeatedly disturbed by training and balanced with sufficient recovery periods to elicit positive training adaptations. Therefore, it is crucial to know and control the impact of training on the body. Key training principles include individuality and specificity of training. Therefore, in order to optimally develop specific physiological systems associated with performance, it is central to analyze the content of training accurately. This information helps to reach the goals for different types of exercise sessions.

“Firstbeat is the premier heartrate monitoring technology available. It allows us to make smarter, more informed decisions about all aspects of our training”

Josh Bonhotal, Men’s Basketball, Purdue University