Nutrition for Triathletes: Fuel Smarter with Science-Backed Advice

A triathletes nutrition journey - couch to Ironman

From Couch to Ironman at 48: A Triathlete’s Nutrition Journey Mar 09, 2026

Starting triathlon later in life can feel intimidating. Many age group triathletes wonder if they’ve missed the boat or if it’s too late to build the fitness needed for long course racing.

But what if you went from doing zero exercise to completing multiple Ironmans… starting at 48 years old?

That...

Sports dietitian and triathlete questioning what dietitian approved means

What Does Dietitian Approved Mean? Mar 03, 2026

You’ve seen it everywhere.

On protein powders.
On cereal boxes.
On sports gels.
On recipe blogs.

“Dietitian-approved.”

But what does that actually mean?

Is it regulated?
Is it evidence-based?
Or is it just a clever marketing phrase?

Let’s unpack it.

First: Who Can Call Themselves a Dietitian?

...

Lose Weight Without Losing Power: Fat Loss for Triathlete's

How to Lose Weight Without Losing Power: Strategic Fat Loss for Triathletes Feb 27, 2026

If you’re a triathlete trying to lose weight but your FTP keeps tanking, we need to talk.

You want to lean up. You want to feel lighter on the run and more aero on the bike. But every time you “eat less”, your watts drop, your legs feel flat and your threshold sessions turn into survival mode.

Sou...

4 Triathlon Nutrition Fixes That Change Everything

Triathlon Nutrition for Age Group Athletes: The 4 Foundations You Must Fix First Feb 20, 2026

You’ve got a structured training plan.
You know your 100m pace, your FTP and your 5km PB.

But when it comes to nutrition?

It’s a bit of a DIY situation.

If you dropped into my world tomorrow as an age group triathlete and needed help with your nutrition, there are four things I would ...

Ironman’s New On-Course Hydration: What It Means for Your Race Nutrition Plan Feb 13, 2026

If you’re racing an Ironman or Ironman 70.3 this year, pay attention.

Ironman has changed its on-course hydration globally. On the surface, it looks like a simple supplier swap. In reality, it has big implications for how you fuel, hydrate and execute your race.

If you’ve been relyi...

World Champion Matthew Hauser: Inside the Life of an Elite Triathlete Feb 06, 2026

What does a typical day look like for a world champion triathlete? How do they fuel, train, and balance it all? For age-groupers trying to juggle work, family, and training, it can feel like pros are in another universe. But there’s so much we can learn from the habits and mindset of elite athletes ...

three triathletes smashing goals thanks to proper nutrition

How Proper Nutrition Transformed These Three Triathletes’ Performance Jan 30, 2026

Training Hard but Still Underperforming?

If you’re putting in the work with your training - ticking off sessions, following a plan, even working with a coach - but still feel like something’s missing, you’re not alone.

Nutrition is often the missing link for age group triathletes. Most train like ...

ER Doctors' Ironman Transformation with Nutrition and Time Management

How a Time-Crunched ER Doctor Slashed 65 Minutes Off His Ironman PB Jan 23, 2026

If you're training hard but not seeing the results you deserve, Edward Walsh's story is about to light a fire under you.

Edward is no average age group triathlete. He's a full-time emergency physician juggling 12-hour night shifts, on-call chaos and family life - yet he still managed to take 65 min...

Why AI and Nutrition Apps Aren’t Enough for Triathletes Jan 16, 2026

Are You Outsourcing Your Nutrition to AI?

If you're a time-poor triathlete juggling training, work and life, it's tempting to let an app or AI tool do the thinking for you. From macro calculators to pre-loaded meal plans, these tools promise simplicity and structure - two things every busy athlete ...

From Zero to Ironman in Five Months Jan 09, 2026

Triathletes are no strangers to going all in. But what happens when you throw yourself into Ironman training with zero experience and think you can out-train a poor diet?

This is exactly what Daniel Walker did. In true Type A style, Dan went from never having done a triathlon to crossing the Ironma...

n=1 The Power of Personalised Nutrition for Triathletes Jan 02, 2026

Triathletes, you train hard, invest in gear and follow structured programs, yet you might still be underperforming on race day. Why? Because you're relying on generic nutrition advice that doesn’t match your unique physiology.

This blog dives into the power of "N=1" – the scientific principle that ...

How Brian Fuelled a 45-Minute 70.3 PB Through Total Life Chaos Dec 12, 2025

Are you a time-poor triathlete juggling family, work and training?

Meet Brian Joseph – a full-time professional, dad of three and Triathlon Nutrition Academy (TNA) graduate who recently shaved 45 minutes off his 70.3 PB. All while navigating a year of sleep deprivation, sick kids and a wife travell...

Triathlon Nutrition Blog

First: Who Can Call Themselves a Dietitian?

Join the Dietitian Approved Crew!

Join the Dietitian Approved Crew!