Muscle pre-fatigue
Who is the muscle pre-fatigue feature for?
This feature was designed for trail runners living in flat regions. Campus wanted to provide a solution, and coach Mathieu Blanchard has created a specific training plan to help you prepare properly—no matter your environment.
Muscle pre-fatigue is integrated into trail training plans (if you activate the option) for users who indicate they have either no hills nearby or only short hills under 2 minutes.
The option will appear in > hill settings if you select that there are no nearby hills or your hill is shorter than 2 minutes
What is the goal of muscle pre-fatigue?
The idea is to simulate the fatigue caused by elevation gain by adding strength exercises before hill intervals in your quality sessions.
How do I activate/deactivate the feature?
You can turn the feature off anytime in > hill settings.
Deactivating it won’t affect your predicted target time, only the progression score of a session. If the strength exercises are skipped, only 75% of the session's progression will be credited.
Which sessions are eligible?
All quality sessions in trail plans are affected, except:
Sessions in the recovery phase
Tapering sessions
Sessions with hill intervals shorter than 2 minutes (e.g., sprints)
Users with more than 2-minute hills in their settings
🔎 If you already have access to real hill terrain (longer than 2 minutes), you won’t see this feature—because the most effective plan is the one that matches your real environment.
To sum up:
This feature is for runners without hills or with hills under 2 minutes near them
Strength exercises are added before* hill intervals in your quality workouts
They help create muscle fatigue to better simulate trail conditions
It improves your muscular resistance to fatigue
You can disable this option anytime in your settings
This feature was designed for trail runners living in flat regions. Campus wanted to provide a solution, and coach Mathieu Blanchard has created a specific training plan to help you prepare properly—no matter your environment.
Muscle pre-fatigue is integrated into trail training plans (if you activate the option) for users who indicate they have either no hills nearby or only short hills under 2 minutes.
The option will appear in > hill settings if you select that there are no nearby hills or your hill is shorter than 2 minutes
What is the goal of muscle pre-fatigue?
The idea is to simulate the fatigue caused by elevation gain by adding strength exercises before hill intervals in your quality sessions.
How do I activate/deactivate the feature?
You can turn the feature off anytime in > hill settings.
Deactivating it won’t affect your predicted target time, only the progression score of a session. If the strength exercises are skipped, only 75% of the session's progression will be credited.
Which sessions are eligible?
All quality sessions in trail plans are affected, except:
Sessions in the recovery phase
Tapering sessions
Sessions with hill intervals shorter than 2 minutes (e.g., sprints)
Users with more than 2-minute hills in their settings
🔎 If you already have access to real hill terrain (longer than 2 minutes), you won’t see this feature—because the most effective plan is the one that matches your real environment.
To sum up:
This feature is for runners without hills or with hills under 2 minutes near them
Strength exercises are added before* hill intervals in your quality workouts
They help create muscle fatigue to better simulate trail conditions
It improves your muscular resistance to fatigue
You can disable this option anytime in your settings
Updated on: 16/06/2025
Thank you!