Strength training
that improves your running
Short, no-equipment sessions built for runners, with the right training at the right time in your week.
RenfoRun is finally an app I can fully trust for my strength training program.
Stephane Jolivet.
French 10,000m Champion, 2h25 marathon
01 / Why strength gets skipped
Strength that helps your running without wrecking your week.
You keep adding miles, but strength work is often improvised, postponed, or squeezed in before the wrong run. Your legs take on more load without always building the strength and stability they need when fatigue sets in. RenfoRun turns that hard-to-place work into one or two short sessions built around your key runs.
- 1 or 2
- sessions per week
- 12 to 25 min
- warm-up included
- No equipment
- bodyweight only
RenfoRun fits around the runs that matter.
- Mon01
Easy run
RenfoRunSession 1
- Tue02
Rest
- Wed03
Speed session
- Thu04
Easy run
- Fri05
Rest
RenfoRunSession 2
- Sat06
Rest or easy run
- Sun07
Long run
This is only an example. RenfoRun adapts strength days to the running sessions you enter.
02 / Less guesswork
Open the app. Know exactly what to do.
No more collecting random exercises or wondering whether strength work will spoil tomorrow's run. RenfoRun starts with the way you run, works around your week, and guides you through every movement.
See the session waiting for me- 01
A program built around your running
Road, trail, level, and schedule: your strength work starts with how you actually run.
- 02
Strength placed around your priorities
Easy run, hard session, long run, rest day: the app protects the runs that matter.
- 03
A guided session ready to start
The exercises, cues, and right amount of work are already there. You can get moving.
Scroll to see all three steps.
03 / What you build
A stronger stride when the miles start to bite.
Strength, stability, and plyometrics all serve the same outcome: use less energy with each stride and hold your form for longer as fatigue builds. The program progresses with your level without adding hours to your week.
improvement in running economy
measured tendon stiffness
per week in the cited research
What changes when fatigue sets in.
Every block develops something you use while running: producing force, keeping your pelvis stable, and holding an efficient stride for longer.
- 01
More force in every push-off
Build explosive strength for a more dynamic stride without hypertrophy-focused training.
- 02
A stride that stays stable
Dynamic core work and postural control help your pelvis hold steady as fatigue builds.
- 03
Legs that hold up for longer
Build the resistance to stay stronger through the final miles of a trail race or marathon.
Sources: Saunders et al. 2006, Berryman et al. 2017, Leppänen et al. 2024
Read the scientific evidenceRunner stories
Legs that still respond in the final miles.
A steadier marathon, long descents without a knee brace, simpler ultra preparation: three runners explain what changed out on the road and trails.
“After years stuck around 3h30 in the marathon despite classic sessions, I discovered Renforun. Result: 3h14 in Rome, no collapse, and surprisingly good recovery. This strength method changes everything. The app adds real value to preparation.”
Mathieu J-C.
Marathon runner
“I always had knee pain, especially on long descents. After three months with Renforun, I can finally run 20 to 30 km trails without pain and without a knee brace. I have rediscovered the pleasure of running freely.”
Charles L.
Trail runner - preparing first ultra
“As a passionate runner, Renforun lets me hand off my physical preparation without overthinking it while staying effective. I enjoy it, and it is exactly what I needed: several sessions, little time required, and clear explanations.”
Veronique A.
Trail runner - UTMB finisher
Different runners, different finish lines.
Elodie B.
Trail runner - 6000D and Grand Raid Reunion finisher
6000D and Grand Raid de la Réunion without muscular pain.
Mat F.
Beginner trail runner
More power uphill and less muscular fatigue.
Cassandre B.
Passionate trail runner
Stronger on descents and smoother on climbs.
Jimmy D.
Amateur marathon runner - 3h10
First marathon in 3h10 with three runs and two RenfoRun sessions per week.
Jeremy S.
Amateur marathon runner - 3h15
3h15 marathon, a steady pace, and no pain at the finish.
Karim B.
Road runner - 10K / half marathon
Stronger legs and a stride that feels different.
04 / FAQ
Questions before you start
Clear answers to help you see how RenfoRun fits into your week.
05 / RenfoRun