July 27, 2026, 8:11 am | Read time: 2 minutes
100 Hyrox competitions in 100 consecutive days–Simon Gronau has successfully completed this extraordinary project. The enormous physical and mental strain is now behind him. In the FITBOOK interview, he discusses how his body coped with the challenge, what insights the final medical check-up provided, and why his focus is now on recovery rather than the next big goal.
During his challenge, FITBOOK had already spoken with Gronau about the motivation behind the project, his preparation, and the expected physical consequences. At that time, he made it clear that “100 days, 100 Hyrox” was not a health project but an extreme strain on the body. After successfully completing it, he now takes stock and talks about how his body is doing today and what insights he gained from the past 100 days.
“Recovery is now clearly the priority”
FITBOOK: After 100 Hyrox races in 100 days, you have successfully completed your project. How is your body doing immediately after this extraordinary strain?
Simon Gronau: “After these 100 days, recovery is now clearly the priority for me. My body performed an enormous amount every day over a very long period. That’s why it now gets exactly the time it needs. Physically, I already feel surprisingly good again. Muscles, tendons, ligaments, and joints are currently not causing any major problems. The full-body MRI, which we conducted for comparison before and after the project, also showed no significant structural damage. Only a small Baker’s cyst was found in the right popliteal fossa.”
“100 Days, 100 Hyrox!”—Simon Gronau Aims to Set World Record
Düsseldorf Resident Sets New Push-Up World Record
The nervous system takes longer than muscles and joints
Where do you still feel the effects of the past 100 days the most?
“I feel the strain most clearly in the central nervous system at the moment. Although the body already seems quite resilient externally, I notice that internally not everything has fully shut down and processed yet. That’s why it’s now mainly about sleep, rest, relaxation, and not imposing a fixed schedule for recovery on the body.”
Also interesting: Hyrox–what’s behind the fitness trend
Why patience after the challenge is more important than the next goal
Many would probably already be planning the next big project after such a success. How do you see it?
“After such a project, the challenge is not to quickly tackle the next goal. It’s more about having the patience to truly enjoy the success first and then calmly assess which areas were weakened by the 100 days and need to be specifically rebuilt.”