About me | catherine horsfall
British Triathlon Personal Coach
I started 10138 Endurance Coaching with one simple purpose: to help people shine through sport.
This isn't just about training plans or finish lines — it's about creating space for people to believe in themselves, build confidence and discover what they are capable of.
My own journey into triathlon was fuelled by purpose, persistence and personal inspiration, and that's what I aim to pass on to every athlete I work with.
As a British Triathlon qualified personal coach, I'm committed to meeting people wherever they are on their journey — whether they're taking their first steps into swimming, cycling or running, preparing for their first triathlon, or chasing ambitious endurance goals.
For me, coaching is about progress over perfection, support over pressure and helping athletes achieve more than they thought possible.
Every athlete's journey is different, but the principles remain the same: consistency, patience and belief.
Rise. Train. Shine.
The principles behind 10138 Endurance coaching
Resilience
Resilience
Resilience
It’s not about being fearless or perfect. It’s about showing up, finding your strength on the tough days, and moving forward - one session at a time.
Balance
Resilience
Resilience
Training should fit your life - not take it over. I will build structure that supports busy lives, families and real - world goals.
Belonging
Resilience
Belonging
Everyone has a place in this sport. My coaching will focus on confidence, community and celebrating your journey - whatever your start line looks like.
Coaching that fits your life
Simple, thoughtful Triathlon Coaching
What’s included:
- Personal athlete profile and goal setting
- Individualised training plan delivered via TrainingPeaks
- Plan updates every 2–4 weeks, and when life requires it
- Weekly WhatsApp or monthly video check-in for clarity, reassurance and consistency
- Training analysis across swim, bike and/or run
- Clear pacing and intensity guidance using heart rate, pace or power where appropriate
- Strength and conditioning guidance where it supports your training
- Ongoing support through the 10138 Approach:
Resilience. Balance. Belonging.
Best for:
- Triathlon athletes at any stage, including 70.3 and full Ironman
- Long-course athletes building towards key events
- Single-sport athletes in swimming, cycling or running
- Athletes returning to training after time away
- Anyone who wants calm, consistent progress with a qualified coach