Steph Gaudreau says most athletic women aren't over-eating - they're under-fuelled. Here's how to screen for it and program around it.
For strong, active women - especially over 40 - the plateau usually isn't a discipline problem. It's chronic under-eating quietly starving recovery. This breakdown covers Steph Gaudreau's fueling and energy-availability message in our own words, adds our honest take for a coaching roster, and shows how to build a fueling screen once and reuse it across every female client.
By Markus Evers · September 2026 · a Coachway video breakdown
the short version
Gaudreau's work argues that strength training delivers for athletic women only when it is properly fuelled - and that the common failure mode for this group isn't overeating, it's chronic low energy availability. The one thing a coach should do about it: before adding any restriction to a stalled female client, screen for under-fuelling, set a deliberate fueling floor, and treat anything near RED-S as a clinical referral, not a coaching cue.
Steph Gaudreau - How Strength Training Transforms More Than Your Body
Source: Steph Gaudreau on YouTube (Fuel Your Strength) - "How Strength Training Transforms More Than Your Body". Watch on YouTube. This clip is broadly about how strength training changes more than a woman's body; we use it as the anchor and summarise her wider fueling method in our own words. The video, title and channel belong to Steph Gaudreau, and nothing here implies her endorsement of Coachway.
Who is Steph Gaudreau, and why coaches watch
Steph Gaudreau is a strength-nutrition strategist and weightlifting coach whose whole platform - the Fuel Your Strength channel, podcast and Core 4 framework - is built around one audience: athletic women, especially over 40, who want to get stronger without living in the gym or under-eating their way through it. That focus is exactly why she is worth a coach's time. Most training-nutrition content skews male or general; she is one of the few consistent voices on female-athlete fueling and low energy availability. If you coach women who train hard, eat "clean" and still stall, she names the mechanism - under-fuelling - that a lot of generic advice misses. This page reads her work through a coaching lens: not "copy her plan," but "how do I screen for and program fueling across a female roster."
What Gaudreau actually argues (our summary)
This is our summary of the fueling method Steph Gaudreau teaches across her work, in our own words - not a transcript of any single clip. Watch her original content for her exact examples and figures.
- 1
The problem is usually under-fuelling, not overeating. For athletic women, especially over 40, she argues chronic under-eating is the common hidden driver of stalled performance, recovery and body composition - the opposite of what diet culture trains women to assume.
- 2
Energy availability is the anchor, not scale weight. Her framework centres on eating enough to cover both training and basic living - she points to a baseline around 40-45 kcal per kg of fat-free mass as a starting reference, rather than chasing a number on the scale.
- 3
Protein and a real carbohydrate floor matter. Adequate protein plus enough carbohydrate to fuel hard training - she describes something like a 130g-per-day carb floor as a starting point - so that strength work is actually supported rather than run on fumes.
- 4
Screen for low energy availability / RED-S. She actively looks for the signs of under-fuelling instead of defaulting to more restriction - a stance that keeps a coach from making an already under-recovered client eat even less.
- 5
Fueling lives inside a bigger picture. Her Core 4 idea - eat, move, recharge, empower - keeps food alongside recovery and mindset, so fueling becomes a supported behaviour rather than one more number to obsess over.
a coaching-scope note
Low energy availability and RED-S (relative energy deficiency in sport) are health conditions, not just programming variables. Everything below is coaching education for spotting under-fuelling and setting a sensible fueling floor - it is not medical or dietetic advice. When a client shows signs like missed or lost menstrual cycles, repeated stress fractures or bone injuries, marked fatigue, or a history of disordered eating, refer them to a physician or registered dietitian and coach within that team's guidance.
Coachway's take
We think this is one of the most underused reframes in coaching: when a hard-training female client stalls, the reflex is to cut more. Gaudreau's point is that for this population, the deficit is often already too big, and cutting further just deepens the hole. Checking fueling before adding restriction should be the default order of operations, not a last resort - and it protects you from confidently coaching a client in exactly the wrong direction.
Where we'd add nuance for a coaching business: her figures - the energy-availability range, the carbohydrate floor - are starting references, and you should hold them loosely. Fat-free mass, training load, life stress and health history all move the target, and the honest version of this advice is "set a deliberate floor and adjust from the client's response," not "prescribe 40-45 kcal/kg to everyone." The value for a coach is the discipline of setting a floor at all, so intake doesn't silently drift down until progress dies.
The other coaching-specific point: this is a screening skill as much as a nutrition one. You are not diagnosing anything - you are noticing patterns (flat energy, poor recovery, stalled lifts despite good training, red-flag symptoms) and deciding whether the next step is "eat more and recover" or "this needs a clinician." Getting that fork right, early, is worth more to a female client than any macro split.
So our version of her advice is: build a simple fueling-and-under-eating screen, run it before you touch a client's calories downward, set a fueling floor you'll defend, and route anything RED-S-adjacent to the right professional. Then - the part that saves your evenings - make that screen a reusable check-in and habit, not a one-off conversation you forget to repeat.
Turn the fueling screen into a repeatable check-in
A fueling philosophy only helps if it shows up every week, not just at onboarding. That's what Coachway's check-ins and progress tracking are for: build your under-fuelling screen once as a recurring check-in - energy, sleep, recovery, cycle notes where relevant, training quality - and see the answers trend over time instead of relying on memory. Pair it with an intake form that captures red-flag history up front, and use the meal planner to set a fueling floor a client can actually hit rather than a target that drifts down between sessions. The behaviours become visible, so "are we fuelling enough?" is a question you can answer with the client's own logged data.
If you want more of the nutrition strategy layer, our breakdowns on protein for clients and recovering from chronic under-eating sit right next to this one - the same "fuel the training you're already doing" theme, from different angles.
Female-client fueling + under-eating screen
A screen you can copy for any hard-training female client before you adjust calories. Part A is a symptom check; any red-flag box means refer to a clinician, not cut. Part B is a fueling-floor reference using Gaudreau's documented starting points - treat the ranges as a starting reference to confirm and individualise, not a prescription. This is a coaching screen, not a diagnosis.
Fueling screen
Part A - under-fuelling signals (check, don't diagnose)
| Signal | Yes / No | If yes |
|---|---|---|
| Stalled lifts / performance despite consistent training | — | Check fueling before cutting |
| Persistent fatigue, poor recovery between sessions | — | Check fueling + sleep |
| Menstrual changes: missed, irregular or lost cycles | — | Refer to clinician |
| Repeated stress fractures or bone injuries | — | Refer to clinician |
| Very low or drifting-down daily intake vs training load | — | Set a fueling floor |
| History of disordered eating or food anxiety | — | Refer + coach within team |
Part B - fueling-floor reference (starting points, individualise)
| Lever | Starting reference | Coach note |
|---|---|---|
| Energy availability | ~40-45 kcal / kg fat-free mass | Anchor, not scale weight |
| Carbohydrate floor | ~130g / day as a start | Raise with training load |
| Protein | Adequate, spread across the day | Support recovery, not just totals |
| Whole-picture (Core 4) | Eat · move · recharge · empower | Protect sleep + recovery too |
How to use it: run Part A first. Any red-flag row = refer, don't restrict. If the picture is under-fuelling without red flags, use Part B to set a deliberate floor and adjust from the client's response over the next few weeks. The Part B figures are Steph Gaudreau's documented starting points, offered here as a reference to individualise - not medical advice or a fixed prescription.
FEMALE-CLIENT FUELING + UNDER-EATING SCREEN (via Coachway) - coaching screen, not a diagnosis PART A - UNDER-FUELLING SIGNALS (check, don't diagnose) Signal Yes/No If yes Stalled lifts / performance despite consistent training Check fueling before cutting Persistent fatigue, poor recovery between sessions Check fueling + sleep Menstrual changes: missed, irregular or lost cycles Refer to clinician Repeated stress fractures or bone injuries Refer to clinician Very low or drifting-down daily intake vs training load Set a fueling floor History of disordered eating or food anxiety Refer + coach within team PART B - FUELING-FLOOR REFERENCE (Steph Gaudreau's documented starting points - individualise, not medical advice) Lever Starting reference Coach note Energy availability ~40-45 kcal / kg fat-free mass Anchor, not scale weight Carbohydrate floor ~130g / day as a start Raise with training load Protein Adequate, spread across the day Support recovery, not just totals Whole-picture (Core 4) Eat / move / recharge / empower Protect sleep + recovery too HOW TO USE: Run Part A first. Any red-flag row = refer, don't restrict. If under-fuelling without red flags, use Part B to set a deliberate floor and adjust from the client's response. Not medical or dietetic advice; refer RED-S-adjacent cases to a physician or registered dietitian.
Fueling female clients - FAQ
What is low energy availability, and why should a coach care?
Low energy availability is when a client is not eating enough to cover both training and the basic biological cost of living - the gap, not the scale weight, is the problem. Steph Gaudreau's whole message to athletic women, especially over 40, is that chronic under-eating is often the hidden reason performance, recovery and body composition stall. For a coach it matters because the client who is stuck often does not need more restriction; they need to eat enough to actually support the training they are already doing. Spotting that early is one of the highest-leverage things a coach can do, and it changes the intervention from 'cut harder' to 'fuel properly.'
How much should a female strength athlete eat to fuel training?
Gaudreau's documented framework uses energy availability as the anchor - a baseline in the region of 40-45 kcal per kg of fat-free mass, with enough protein and a working carbohydrate floor (she points to roughly 130g a day as a starting point) to support hard training. Treat those as her starting points and coaching reference values, not a prescription: fat-free mass, training load and health status vary per client, and anything in RED-S territory belongs with a clinician or registered dietitian. The coaching takeaway is to set a fueling floor deliberately rather than letting intake drift down until progress stops.
Is under-eating a bigger risk than overeating for athletic women over 40?
For the population Gaudreau works with, she argues the more common and more damaging pattern is under-fueling, not overeating - years of diet-culture conditioning leave many active women eating well below what their training demands. That does not mean overeating never happens; it means a coach should not assume a plateau is a discipline problem. Often the woman who trains hard, eats 'clean' and still feels flat is under-recovered because she is under-fueled. Screening for that first, before adding restriction, is the safer default for this client profile.
How do I coach fueling without it becoming a diet obsession?
This is where Gaudreau's Core 4 idea - eat, move, recharge, empower - is useful for coaches: fueling sits alongside recovery and mindset rather than becoming another number to police. Practically, that means framing food as support for strength and performance, protecting sleep and rest, and watching for signs the client is drifting back into under-eating rather than adding more rules. Coachway's habit and check-in tooling lets you track those behaviours and how the client feels, so fueling becomes a supported habit you can see over time - not a restriction the client white-knuckles between sessions.
More nutrition + coaching breakdowns
- · Stephanie Buttermore on recovering from chronic under-eating - the same fueling problem from the recovery side.
- · Susan Niebergall on fat loss over 50 - programming the older female client without under-fuelling.
- · The full roundup: fitness YouTubers coaches should study.
Keep dialing in client nutrition
all guidesDr. Gabrielle Lyon on Protein: Muscle-Centric Nutrition (Coach Breakdown)
Dr. Gabrielle Lyon's muscle-centric protein argument, broken down for coaches: why she pushes protein higher, why the first meal matters, and how to set and track protein targets for clients.
Read the guideStephanie Buttermore's All In: Recovery From Restriction (Coach Breakdown)
Stephanie Buttermore's All In approach, broken down for coaches: what recovery from chronic under-eating looks like, how to spot the signs in a client, and how to program a recovery phase responsibly - and when to refer out.
Read the guideSusan Niebergall on Fat Loss Over 50: Why Weight Loss Stalls (Coach Breakdown)
Susan Niebergall's sustainable, strength-first fat-loss approach for women over 50 and menopause, broken down for coaches: the real reasons fat loss stalls, and how to program and troubleshoot it for an older-female roster.
Read the guideFree tools for this: Calorie Deficit Calculator · Macro Calculator · One-Rep-Max Calculator
Make the fueling screen a weekly habit, not a one-off talk
A fueling philosophy only pays off if it shows up every week. Coachway lets you build your under-fuelling screen once as a recurring check-in, capture red-flag history on an intake form, and set a fueling floor clients can actually hit - then watch energy, recovery and adherence trend over time instead of guessing. Start your 14-day free trial and screen your first female client roster from one screen.
