Sustainable Performance & Self-Confidence

Your Home For Everything Endurance Sports. Performance, Mental Power and Nutrition. Full Spectrum.


Have training questions? Start here...
We take an athlete’s whole life into consideration, not just training sessions. We know that being an athlete requires much more than just the workouts. Want to learn more? Here’s a great article to get you started!

We offer 1:1 coaching for endurance athletes, triathletes, cyclists, runners, & swimmers. In addition, we offer training plans through Training Peaks and continuing education through articles and podcasts that focus on the full-spectrum approach. 

Having a coach is a huge benefit to your training, no matter what level of athlete you are. A coach is someone who can assess your progress objectively  and help you in planning for your goals, AND they can help you adjust course if needed, help you stay motivated and point out potential blind spots in your training. If you’ve ever wondered “I wonder if I should…” in regards to your training, then maybe it’s time to talk to a coach. 

Learn more about our 1:1 Coaching Services

Read more about the benefits of a coach

Great question and congratulations for knowing that an off-season is beneficial to your training! We have a few articles to get you started: 

How to Train in the Off-Season

How to Use the Off-Season to Strengthen your Mental Game

While this depends on each individual, there are some basic guidelines. Here are some articles to get you started: 

Healthy Gut, Happy Brain

The Dangers of Underfueling

Have more questions? Make an appointment with our Fuel (Nutrition) Coach Dani

Understanding your different intensity zones is key to effective endurance training. Let Coach Marion teach you what to measure, when.

In short: YES. The female hormone cycle is an important factor to consider as we coach our athletes. While women can race and perform well at any point in their cycle, we do take great care in adjusting the types of workouts to match each athlete’s hormone cycle. This way, we utilize the female physiology as a strength to make workouts as effective as possible. 

This Week's Featured Article

Adaptation is the Big Endurance Goal

In endurance sports, once we add a pinch of ambition, we head towards a path of chasing improvement. Heart rate monitors, power meters, endless metrics and online tools. But what do we actually need to get better? Let’s dive into this.


The Intense Challenge of Measuring Intensity

Being an endurance athlete, you are most likely familiar with the four key components of your training program: Frequency, Duration, Intensity and Recovery. How to best determine, measure and implement the “right” workout intensity has...

Keep reading ...


Unleashing Your Untapped Potential

Being an athlete is not just about physical strength and endurance, it's also about mental fortitude, resilience, and the ability to push through pain and adversity. But to truly reach our full potential as athletes, we must first discover our...

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Healthy Gut, Happy Brain

From a functional nutrition perspective, everything starts in the gut and what it can do with the foods we eat. There are billions of microorganisms living in our gut that have a beneficial relationship with us. We feed them and they “feed” us. But this relationship can become non-beneficial, if...

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The Complete Athlete

Performing at your best and reaching your full potential…this seems too good to be true and something that is only withheld for pro athletes. It is not! Let me introduce you to the complete athlete. A step-by-step system that will help you improve your current situation and will allow you...

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Fueling and the Full-Spectrum Approach

Most athletes know that good nutrition is essential for great performance and wellbeing. Yet there is still a lot of confusion. Sadly, a lot of that has to do with the fact that much of the information out there comes from studies sponsored by food manufactures or they are simply...

Keep reading ...


Our training plans offer more than just workouts!

You’ll also get nutrition & mental power guidance!

AND we honor male/female physiology differences by providing two types of plans.

*All training plans are offered through TrainingPeaks. 

Featured Plans


Overwhelmed by stress? Because of this, do you neglect your self-care?

Do you feel like you’re missing out on reaching your full potential?

At FS Endurance we help you to improve all aspects of your life. We connect scientific based training with decades of experience in pro & amateur sports. We take care of your individual fueling needs and work with your body’s specific needs. Of course mental power is deeply integrated into our work and your daily training & life. This will build your resilience and prepare you for any challenge that you might face.


Stefanie Sichler

COACH (Mental Power), Founder

As a Licensed Trauma Therapist, NASM Certified Personal Trainer, and Certified Yoga Instructor, Stefanie works with our athletes to help increase self-confidence, decrease self-limiting beliefs, and improve functional movement.

Works with all performance levels.
Speaks English & German

Florian Bogge


12 years coaching experience, works with all performance levels, Triathlon and cycling, countless Kona Qualifiers & championship titles, former triathlon pro, lives in Kailua-Kona Hawaii USA

Works with all performance levels.
Speaks English & German

Nico Markgraf

COACH (Performance)

Experienced triathlon coach, works with all performance levels, Racing as triathlon pro, Master in Sport & Fitness, lives in Germany

Works with all performance levels.
Speaks English & German

Marion Summerer

COACH (Performance)

M.Sc Sport Sciences Training & Diagnostics
B.Sc (HONS I) Clinical Exercise Physiology
A.S. Exercise & Sport Science
3x Triathlon World Champion
Road Triathlon & XTERRA Expert

Works with all performance levels
Speaks English & German

Daniela Salvado

COACH (Nutrition)

As a Certified Functional Nutrition Counselor and meal prep enthusiast, Dani works with our athletes to increase performance & well-being by implementing highly personalized nutrition strategies and plans. Lover of the outdoors and based in Boulder Colorado, USA.

Works with all performance levels.
Speaks English & Portuguese

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