Meet your coach

THE COACH
BEHIND FASTR.

I'm Alex Foster, an endurance coach, lifelong competitor and firm believer that every session should have a purpose.

British Triathlon qualified, with more than a decade of coaching experience and 15 years competing at a high level across triathlon, I bring the athlete's perspective into every plan.

Alex Foster carrying a sandbag during a HYROX race
ATHLETE / COACHAlways learning. Always progressing.
2016Coaching since
10+Years coaching endurance sport
2015British triathlon champion
2026HYROX World Championships

Why I coach

THE JOURNEY BECAME
BIGGER THAN MY OWN.

Coaching began in 2016 through voluntary triathlon coaching. What started as a way to share experience quickly became the most rewarding part of the sport.

As the number of athletes grew, so did the enjoyment of being part of somebody else's progress. Supporting beginners through their first event and helping experienced athletes compete for race wins gradually took priority alongside my own athletic ambitions.

That community became Tri Fit Coaching: a team of like-minded people working toward very different goals, but sharing the same commitment to progress. FASTR Performance is the next stage of that journey.

Coaching is helping each athlete progress in whatever way I can. Most often, that means making purposeful training work around real life.

The athlete behind the coach

BUILT ACROSS DISCIPLINES.

Years of racing, learning and adapting across endurance sport shape how I understand the demands placed on the athletes I coach.

Alex Foster representing Great Britain during a triathlon bike leg
Great Britain age-group triathlon
Alex Foster racing on the bike during a triathlon
15 years of high-level triathlon
01

SWIM & WATER POLO

A national-level youth swimmer and water polo player, building the technical and competitive foundation that shaped everything that followed.

02

TRIATHLON

Fifteen years competing at elite and national age-group level, representing Great Britain at European and World Championships and winning the British Championships in 2015.

03

HYROX

Moving into HYROX in 2024 brought a new multi-discipline puzzle. In 2026, I represented Great Britain at the HYROX World Championships.

What success means

YOUR GOAL.
YOUR SUCCESS.

Winning matters, but it is not the only way to measure success.

Success might be a podium, a personal best, moving from HYROX Open to Pro, or hearing “you are an Ironman” for the first time. The goal we agree at the beginning becomes our shared definition of success.

  • Ironman podiums and first-time finishers
  • World Championship athletes
  • parkrun PBs and marathon success
  • Ultra and off-road running finishes
  • HYROX Open, Pro, Singles and Doubles

How I coach

EVERY SESSION HAS A PURPOSE.

The best plan is not the one that looks most impressive on paper. It is the one that fits the athlete, can be executed consistently and keeps evolving as performance changes.

01

Life-aware planning

Progressive training structured around the time, work, family demands and facilities you genuinely have available.

02

Data-led decisions

TrainingPeaks, session feedback and performance data guide the plan and help every phase move in the right direction.

03

Technique first

Movement and technique analysis, delivered remotely or in the FASTR Performance Lab, finds efficiency that the stopwatch alone cannot show.

04

Fuelling the work

Practical training and event-fuelling guidance supports the work, recovery and race execution the plan demands.

Why FASTR

A WIDER VIEW OF PERFORMANCE.

Tri Fit Coaching built the team. FASTR Performance better reflects the athletes, sports and ambitions that team now represents.

HYROX and triathlon share more than first appears: multiple disciplines, individual strengths and weaknesses, endurance under fatigue and the need to piece every part of the training puzzle together. Running sits at the heart of both.

FASTR brings that wider endurance and hybrid-performance focus under one name without losing the community, individual attention or enjoyment that coaching was built on.

Your next chapter

LET'S BUILD
WHAT COMES NEXT.

Tell me what you're training for, where you are now and what you need help with. We'll work out whether FASTR is the right fit.

Start your journey