👋 Welcome to our Science Knowledge Base

The list below is part of us being more transparent about how enduco works and what scientific literature we took into account when developing the technology behind enduco.

As it is with scientific findings: They’re accepted as to be true until new findings come up through research – and so this list will change over time. New studies will be added, while others, which prove to be out-dated, will be replaced. So, please consider this to be a living document! ☝️

Besides, we only put in the most important papers. We will constantly add more soon, which will then be to find under the “more on this topic”.

If you have questions or found a piece of research that might be interesting and add benefit to enduco, please feel free to reach out to us via [email protected]

🧐 If you’re a researcher, looking for ways to collaborate on any level, please also reach out. There will be launched more throughout 2023 for researchers, but we’re happy to get in touch prior to that happening.

🧘‍♀️ Wellbeing

Feeling Factor & Heart rate variability (HRV)

Oliveira, R., Brito, J. P., Martins, A., Mendes, B., Marinho, D. A., Ferraz, R., & Marques, M. C. (2019). In-season internal and external training load quantification of an elite European soccer team. PloS one14 (4), e0209393.

Rabbani, A., Clemente, F. M., Kargarfard, M., & Chamari, K. (2019). Match fatigue time-course assessment over four days: Usefulness of the Hooper index and heart rate variability in professional soccer players. Frontiers in physiology10, 109.

Kiviniemi, A. M., Hautala, A. J., Kinnunen, H., & Tulppo, M. P. (2007). Endurance training guided individually by daily heart rate variability measurements. European journal of applied physiology101 (6), 743-751.

<aside> 💡 The Feeling Factor includes four categories: fatigue, stress, muscle soreness and quality of sleep of the night that preceded the evaluation. It was used the Hooper index scale of 1–7, in which 1 is very, very low and 7 is very, very high (for stress, fatigue and muscle soreness levels) and 1 is very, very bad and 7 is very, very good (for sleep quality). The summation of the four subjective ratings is the Feeling Factor.


<aside> 💡 Fatigue, stress, muscle soreness and sleep perception: These variables are commonly associated with psycho physiological stress responses, such as rating of perceived exertion or Hooper Index (HI) scores, also recognised as internal Workload


<aside> 💡 While group analyses showed a similar pattern for recovery time-course, more individual athletes responded, similarly when tracked using the Hooper-Index compared to when they were tracked using HRV.


<aside> 💡 Endurance training guided individually by daily heart rate variability measurements