Control Injury Risk

JOHAN Sports functionality - Injury preventionBased on our measured data and sports scientific insights we are able to detect an increased injury risk. This step (from data to information) is highly valued by our users because the coach, trainer or other staff members gets these insights in an easy to read dashboard on screen. A report is easily made and printed.


We believe that it is very important to make sure your training load has a sustainable growth over time. A too steep increase or decrease in the training load leads to a higher injury risk. This theory, also known as ‘acute versus chronic overload’, has been developed by Tim Gabbett and states that:
The acute load (past week) versus chronic load (past 4 weeks) needs to stay within 80% and 130% (also known as the ‘sweet spot’).

So how to use this theory to prevent injuries?

First step: measure the training load. The training load can be easily quantified by our JOHAN motion trackers. We use the following parameters:


– Total distance
– Sprint distance
– Number of sprints
– Number of accelerations
– Number of decelerations


Each of these parameters has a different influence on your player’s body. How this works will be explained in a later article.


Second step: act when one of these parameters falls out of the ‘sweet spot’ of training load.
For instance: a player is exceeding his allowed sprint meters in a week. Then the training load in the subsequent days should be adapted.

Know how players feel to prevent injury

Within professional sports teams it has become common practice to measure the response of players on the training and match load by exertion and recovery questionnaires. This is an easy, yet very important part of the prevention of injuries. Players fill in these questionnaires through the JOHAN web app (in a few months we will launch a dedicated mobile app for this) by rating their response with ten-point scales.


Exertion is measured directly after the exercise. The ten-point scale ranges from, for example, ‘very easy training’ till ‘very hard training’. Recovery is measured each morning for appetite, sleep quality, fatigue, muscle soreness and mental stress. Each morning (before the training or a match) you should check the responses of all your players in the team and act upon outliers in the data. A personal talk with appropriate follow-up actions is vital for proper injury prevention.

Heart rate data

Nowadays sports science focuses more and more on gps data since it can prevent injuries. However, this does not mean that heart rate data is useless. With heart rate data you have insight in how players react on an external load (measured with GPS). So a combination between GPS and heart rate data (together with Forms) gives you a complete picture of the physical status of a player.


Therefore, JOHAN Sports also has special Heart Rates vests that enables the storage of heart rate data on the GPS unit. After uploading all the data to the online software environment, the analyst and coach has access to the most important physical data of a player within one integral platform. This is the future to prevent injuries, optimize training and herewith optimize player and team performance.

Our partners

We are very thankful to our supporting partners. JOHAN ist part of the European Space Agency (ESA)Business Incubation Program in Noordwijk and JOHAN is supported by the European GNSS Agency (GSA).
ESA European Space Agency - partner of JOHAN Sports performance analytics for sport teams
GSA - partner of JOHAN Sports performance analytics for sport teams
VU Vrije Universiteit Amsterdam - partner of JOHAN Sports performance analytics for sport teams
TU Delft - partner of JOHAN Sports performance analytics for sport teams