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Use in training or why monitor SA HRV

Modern scientific evidence shows that training on days when high HRV is measured is significantly more beneficial than on days when HRV is low.

This new scientific method demonstrates the validity of the general supercompensation theory on which the most efficient use of the mySASY system is based


MySASY and basic training theory


The basic training theory is based on the general adaptation principle (see figure)

  • POINT 1 In a calm state, the internal balance of the organism (homeostasis) is manifested by a basic, individually different balance between parasympathetic (PA) and sympathetic (SY) 
  • POINT 2 By systematically applied loading, the internal balance of the organism is disturbed - SY activity increases, PA activity remains unchanged or slightly decreases, it is reflected by shifting the result to quadrant 2
  • POINT 3 The organism tries to prepare for a repetitive load - to adapt, to increase its capacity - the activity of SY decreases, the activity of PA increases, it will be reflected by shifting the result to quadrant 1
  • This capacity increase is of a certain size and takes only a certain amount of time, depending on the load characteristic - this time when the most efficient capacity increases most efficiently is called SUPERCOMPENSATION
  • This effect fades away. If there is no additional stimulus / training at this time, the capacity decreases gradually (de-training)
  • POINT 4, 5 If the load is too high or the regeneration time is too short, there is insufficient adaptation to the load, cummulation of fatigue occurs and there is a risk of overload and related complications - PA activity decreases, SY activity increases, result shifts to quadrant 3 or 4

about about

MySASY and real training

  • Basic, above-presented principle of functioning
  • The presented regular curve is only a theoretical, universal model
  • It is proven that the objective level of regeneration and adaptation does not correspond to subjective perceptions, with the current feeling 
  • there is no universal real time recommendation for determining the appropriate duration of regeneration and the onset of supercompensation.

Reality is fundamentally affected:

  • individual disposition of the athlete - training
  • the current state of the organism
  • the long-term and current load characteristics
  • different adaptive curves of individual systems of the organism
  • different rates of recovery of energy sources and regeneration of tissues


There is a solution ...

One "control unit" - the autonomic nervous system – is in charge of the synchronization of all adaptation processes.


Using mySASY, it is possible to accurately evaluate the activity of the autonomic nervous system and its two branches, to monitor trends in their equilibrium and to respond to changes in load and regeneration


This is mySASY

A tool suitable for all athletes


  • to monitor when the SUPERCOMPENSATION stage is in progress, when and how it is most efficient to carry out additional loads
  • evaluate the level of fatigue and the level of regeneration of the organism
  • monitor and evaluate the reaction of the organism to the training load (too big - slowing recovery, too small - insufficient training stimulus)
  • using an objective assessment of the level of the regeneration process to find optimal ways and durations of regeneration
  • allows optimal dosing and timing of load and rest
  • in addition to the current response, monitor the long-term adaptation to the training load leading to the right training to improve trainability
  • prevent overloading of the body and thus chronic overload or overload
  • evaluate training - level and speed of regeneration of the athlete's body and thus the level of sport talent
  • make training adjustments to optimize the training process
  • tune the exact sports form
  • mySASY is the only mobile solution to monitor SA HRV anytime, anywhere with instantly available results


Whether you are a professional or just a recreational athlete, you will always find the right way to use it.

The tool for the most effective training possible

Traditional training approach:

  • I apply training according to common practice
  • I estimate how the organism will respond to it
  • I estimate how it affects the internal balance of the organism
  • I estimate how long regeneration should take
  • I estimate what should be the most appropriate training mode
  • I hope that the training will bring its effect


The most effective training approach:

  • I measure the current state of the inner balance of the


  • In the supercompensation phase, I will place the most demanding training load
  • In the phase of persistent fatigue I will include regenerative units
  • By measuring I monitor the body's current response, which is the basis for further training
  • I find optimal load and rest models
  • I use their most effective combination

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