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JOHAN keeps you up-to-date with all the latest developments in the field of sports science! On this page you find an overview of engaging blog articles about relevant topics written by our own sports scientists. Also read interesting news and scientific analyses about the biggest events in field sports.

Hamstring injuries are one of the most occurring muscle injuries in team sports. In football, 37% of all muscle injuries are hamstring injuries. A hamstring injury is characterized by a relatively long recovery period (4-8 weeks) and a high recurrence rate of up to 33%. Together, these factors show ...

In team-sports, like football and field hockey, the type of workload that each player has to perform is largely dependent on their playing position. These differences in playing positions influence the capacities that each player needs to have to fulfill these match demands. Based on the position-sp...

In most of our blogs, we have discussed how GPS data can help you preparing your players for the match by optimizing training sessions. However, GPS data does not only help you adjust your training sessions, it can also be used to help you optimizing your nutritional guidelines. Therefore, in this b...

As we have discussed in the blog of last week, it is important to quantify the load of different kind of actions to get a comprehensive picture of the load on the players. Some of the actions that you want to monitor are the high-speed actions and the short explosive actions. These can be captured w...

Football and field hockey are intermittent sports: high-speed actions and short explosive actions are followed by periods of (relative) rest. When monitoring a team, it is important that you get an overview of all these different kind of actions. However, if you want to get an overview of all these ...

In previous blogs we have provided benchmarks for different playing levels, and different playing positions. But what are you going to do when your team does not reach the benchmark for your playing level? Does this mean that your team is not fit enough? Or might there also be other reasons why your...

Let’s imagine that you are analyzing the match performance of your team. You notice that your team is always pushed back in the last minutes of both halves. When analyzing the match report, you see the same trend: the workload declines across both halves and throughout the whole match. Based on th...

In previous blogs we have discussed the value of GPS-monitoring for team performance optimization. However, when you first start monitoring your team with GPS, the results of the different load variables might be hard to interpret. Your players might, for example, cover 500 sprint meters in a match....

We are proud and honored to announce that Royal Orée Hockey has started using the JOHAN Sports GPS system as well as the Wellness App for their Men’s team. This makes them the first top tier Belgium hockey club to start using the JOHAN Sports......

Heart rate monitoring is one of the most popular methods of monitoring the internal load of team sport players. One of the reasons for this, is that it is a very intuitive method: we all know that when we exercise, our heart rate is going up. Therefore, analyzing the heart rate of players can help u...

As per July 2019, JOHAN Sports and Panathinaikos started a new partnership forthe 1st team and their Academy. Coincidence has it that in July the Greek football club chose their home base for a training camp in The Netherlands where they completed multiple (very successful) friendly matches vs Fe...

We are at the start of the competitive season and are, thus, leaving behind the high physical workloads of the pre-season training period. The focus during the week will shift towards optimally preparing the players for a peak performance in the match, rather than on solely improving their physical...

In the last two blogs, we have discussed how the Player Status Module supports you in designing a training program with the ideal amount of training load and ideal variation of training load within a week. However, knowing what the players have done is not the only aspect that is integrated within t...

In the last blog, we have seen how the Player Status module helps you to determine the optimal amount of load for your players. However, the amount of load isn’t the only thing to take into account when designing a training schedule. Variation in training load within a week is also important for g...

2nd Division amateur club Kozakken Boys started their pre-season with the JOHAN Sports GPS system. The club from Werkendam joined JOHAN Sports for a two-year deal and became the 7th club to use the JOHAN system in the 2nd division (highest amateur level in the Netherlands)....

As a (physical) trainer or coach, you are balancing training load on a daily basis. High physical loads improve fitness levels of the players, in turn enhancing the performance of your team. On the other hand, high training loads also increase the risk of overloading your players. In order to optimi...

Last week Gil Vicente FC started the pre-season with the new JOHAN Sports GPS vest. This will be a big step forward for Gil Vicente FC in order to create a high performance culture within the organization....

Today the women’s soccer World Cup final will take place in France. The road to the final was tough for the teams: both team having to play 6 matches in less than 25 days. With little time to recover between these matches, fatigue may play a role in the final. American players showed signs of fati...

After the summer break, and the corresponding decrements in physical fitness, the preparation period focuses on restoring the physical fitness of the players. The endurance capacity of the players is one of the factors that is reduced in the summer break. However, this capacity is also of importance...

In the last weeks, most football- and hockey players have enjoyed their well-deserved summer break. After a long season, the players needed some mental and physical recovery time to be ready for the start of the new season. For some players holiday time is already over, since several (professional) ...

How often have we been discussing the differences between men and women’s football? We can all think of lots of examples which highlight the differences between both types of football. Some examples will be in favor of women’s football and other’s will be in favor of men’s football. In this ...

From little on boys and girls have the dream of becoming a professional hockey or soccer player: they dream of winning league titles and playing in the World Cup final. However, only some are lucky enough to get scouted for a professional youth academy. Even though they have to train 4 or 5 times a ...

Which players in your youth academy are ready for the next step? Deciding which players remain in the academy next season and which teams they will play in, is a tough decision. Several aspects need to be taken into account (tactical skills, motivation, anthropometrics, physical fitness etc.), befor...

Which players in your youth academy are ready for the next step? Deciding which players remain in the academy next season and which teams they will play in, is a tough decision. Several aspects need to be taken into account (tactical skills, motivation, anthropometrics, physical fitness etc.), befor...

In the last blog we have discussed how benchmarks can help you plan your training program ahead. Furthermore, in previous blogs we have also discussed the added value of using both GPS-data and subjective data to monitor your team. However, we have not discussed how......

In the past few weeks, different concepts of periodization have been discussed and it is explained how you can check whether you have reached the demands. However, this was all based on checking after the training whether you have reached your goals. In today’s blog,......

Have you ever wondered whether your players perceive the intensity of your training as intended? And did you know that you can win games, prevent injuries and optimize the training loads of your players with only their answers on 5 easy questions? Getting information from exertion and recovery...

In Dutch sports media, there has been a discussion for over a week about how Ajax – but especially Tottenham – will play in the match of tonight. Will Tottenham go for the tactics of Real Madrid and Juventus, and thus give Ajax space to......

In the last two blogs we have discussed two periodization models: the block periodization of Verheijen and the acute:chronic ratio of Gabbett. The two models shouldn’t be viewed as opposing theories, rather they are complementary to each other. In today’s blog we will therefore discuss......

Trainers and coaches are balancing training load on a daily basis. High training loads improve the physical fitness, and decrease the risk of injury. On the other hand, when training load is too high this increases the risk of injury. Having to deal with these......

High performance in team sports requires different physical capacities: endurance, explosive accelerations, sprinting, and the ability to quickly change direction. As trainer/coach, it is your task to train these factors. There are multiple periodization models that can help you to get your players ...

We are almost at the end of the football and field hockey season. As a trainer/coach you have likely noticed that fatigue is starting to build up in your players; they are not as fresh as at the beginning of the season. And to make......

Do you notice that your players can not perform the deciding actions at the end of the match anymore? Or do you have to many goals against in the last fifteen minutes of the match? In this blog we will discuss how you can improve......

Periodization is a commonly used term in sports. But what does periodization mean? And which principles can you, as a trainer or coach, integrate in your training schedule? In the coming weeks we will answer these questions and we will discuss the different principles of......

As a coach you want your team to get fully rested during the winterbreak without losing all fitness after the holidays, so your team doesn’t have to catch up lost fitness when recommencing competition. A winter break, generally lasting about 14 days, is the perfect......

As a coach, you want to train your team as hard as possible and minimize the injury risks. Balancing between those two extremes is a tough job. You don’t want to train too hard causing exertion, or worse: injured player(s). Training too soft with the......