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

Updated on: 16/06/2025