The Simple Rules That Make Healthy Eating Sustainable
Successful nutrition isn’t about eating perfectly.
It’s about building a system you can follow consistently.
This guide outlines the nutritional foundations I use with every client, regardless of whether their goal is:
- Fat loss
- Muscle gain
- Improving health
- Better blood sugar control
- Increasing energy
- Improving performance
- Creating sustainable habits
These principles are designed to simplify your decisions and remove the confusion surrounding nutrition.
The ROSI3R Nutrition Philosophy
Our goal is not to follow a restrictive diet.
Our goal is to build eating habits that support your body for years to come.
Focus on:
- Quality food
- Consistency
- Appropriate portions
- Protein at every meal
- Plenty of fruit and vegetables
- Regular movement
- Good hydration
Small decisions repeated consistently produce remarkable long-term results.
Hand Portion Guideline
Rather than counting every calorie, use your hands as a practical portion guide.
Women
Protein
- 1 palm per meal
Carbohydrates
- 1 cupped handful per meal
Healthy fats
- 1 thumb per meal
Vegetables
- 2 fists per meal
Men
Protein
- 2 palms per meal
Carbohydrates
- 2 cupped handfuls per meal
Healthy fats
- 2 thumbs per meal
Vegetables
- 2 fists per meal
These are starting guidelines. Portions can be adjusted based on your goals, activity level, training demands and progress.
Breakfast Rule
Build breakfast using four simple components:
Quality carbohydrate
Examples:
- Oats
- Low-sugar muesli
- Wholegrain toast
- Wholegrain wraps
- High-fibre cereal
- Fruit
High-quality protein
Examples:
- Greek yoghurt
- Cottage cheese
- Eggs
- Protein powder
- Milk
- Skyr
- Tofu
Protein helps support muscle maintenance, recovery and satiety.
Healthy fats
Examples:
- Nuts
- Nut butters
- Chia seeds
- Flaxseed
- Pumpkin seeds
- Almonds
- Walnuts
Healthy fats support hormone production, brain health and long-lasting energy.
Fruit
Include one serving of fruit whenever possible.
Examples:
- Banana
- Berries
- Apple
- Kiwi
- Pear
- Orange
Lunch Rule
Build lunch using the ROSI3R Plate Method.
Include:
- 1 serving of protein
- Plenty of colourful vegetables
- A quality carbohydrate
- Healthy fats when appropriate
Examples include:
- Chicken and salad
- Beef with vegetables
- Tuna and rice
- Chicken wrap
- Sushi
- Leftover dinner
- Meal-prep containers
Lunch should be practical, satisfying and easy to repeat.
Dinner Rule
Dinner should support recovery, blood sugar management and long-term health.
Rotate your protein sources throughout the week.
Choose from:
- Fish
- Chicken
- Turkey
- Lean beef
- Lamb
- Pork
- Eggs
- Tofu or tempeh
Aim for:
- Fish 2–3 times each week
- Lean red meat around once per week
- Poultry several times each week
- Variety over perfection
Build dinner around:
- Protein
- Plenty of vegetables
- A quality carbohydrate when appropriate
- Healthy fats
Fruit Rule
Aim for 2 servings of whole fruit every day.
Rotate different fruits throughout the week.
Excellent choices include:
- Bananas
- Apples
- Pears
- Berries
- Kiwi
- Citrus fruits
- Grapes
- Seasonal fruit
Pair fruit with a protein source when possible for a balanced snack.
Examples:
- Banana and Greek yoghurt
- Apple and cottage cheese
- Pear and almonds
- Berries with oats and yoghurt
Hydration Rule
Hydration supports energy, concentration, digestion, recovery and exercise performance.
Aim for 2–3 litres of fluids each day.
Prepare your first 1.5-litre bottle before your day gets busy and refill it as needed.
Choose the options you’ll drink consistently:
- Still water
- Sparkling water
- Naturally flavoured water
- Electrolyte water (when appropriate)
- Herbal teas
- Green tea
- Black tea
- Hot water with fresh lemon
During colder months, warm drinks such as herbal tea or hot lemon water can make staying hydrated much easier.
The goal isn’t to drink cold water—it is to stay hydrated consistently.
Eating Out & Busy Days
Healthy eating should work in the real world.
When eating out:
- Choose a quality protein first.
- Add vegetables where possible.
- Include a sensible portion of carbohydrates based on your activity level.
- Choose healthy fats in moderation.
- Drink water or sugar-free beverages.
If fast food is your only option, make the best choice available—not the perfect one.
One meal never determines your progress.
Your habits do.
Core Principles
- Build every meal around protein.
- Eat plenty of colourful vegetables.
- Enjoy whole fruit every day.
- Choose mostly whole, minimally processed foods.
- Match carbohydrate intake to your activity level and goals.
- Include healthy fats every day.
- Stay well hydrated.
- Train your body regularly.
- Prioritise sleep and recovery.
- Progress comes from consistency—not perfection.
Final Thoughts
You don’t need a complicated nutrition plan.
You need a plan you can follow on your busiest days, your most stressful weeks and throughout every season of the year.
The aim is not to eat perfectly.
The aim is to make slightly better decisions, more often.
Over time, those decisions become habits.
Those habits become your lifestyle.
And that lifestyle determines your long-term health, performance and quality of life.
The goal is not dependency.
The goal is competence.
Coach Ryan ROSI3R