
Athlete Nutrition Foundations: Protein, Carbs and the Meals That Actually Move You Forward
Forget cleanses, 'clean eating' and shake-only diets. Real athletes win on boring fundamentals - protein at every meal, carbs around training, micronutrients from real food. Here's the playbook we give every Onyx athlete on day one.

Simen Christiansen
Onyx Head Coach
1.6-2.2 g/kg
Protein target
3-5
Meals per day
3-5 g/kg
Carbs (training day)
80/20
Adherence rule
Nutrition is where most training programs quietly die. Not because people eat 'badly' - because they eat randomly. No protein target. No carbs around training. No plan for the weekend. Fix that and your program starts working like it was supposed to from week one.
— Macro 1
01Protein - the non-negotiable
Every credible study on hypertrophy and recovery in the last decade lands in the same place: 1.6 to 2.2 grams of protein per kilogram of body weight, per day, split across 3 to 5 meals. Below that range, you leave gains on the table. Above it, no extra benefit. It is one of the tightest ranges in sports science.
A 80 kg lifter needs 130-175 g daily. That's roughly 30-40 g per meal, four times a day. Not complicated - just consistent.
Best sources per gram
- Chicken breast, turkey breast - lean, cheap, high leucine
- Lean beef and bison - iron and creatine bonus
- Salmon, sardines, mackerel - protein + omega-3s in one shot
- Whole eggs - the gold standard amino acid profile
- Greek yogurt, cottage cheese, skyr - slow-digesting, gut-friendly
- Whey isolate - the fastest way to hit a target when time is tight
"Nobody has ever failed at building muscle because their food wasn't 'clean' enough. Thousands have failed because they didn't hit their protein."
— Macro 2
02Carbs - the most misunderstood macro
Carbs are not the enemy. For a training athlete, they refill muscle glycogen, drive high-intensity output, protect your hormones, and let you recover between sessions. Going low-carb 'to lean out' is a tax on your training quality, and usually a tax you don't need to pay.

Practical targets
- Training days: 3-5 g/kg body weight
- Rest days: 2-3 g/kg body weight
- Fat loss phase: keep training-day carbs high, cut on rest days first
- Peak week / competition: increase progressively - not the day of
— Macro 3
03Fats, fibre, micros
Set dietary fat at 0.8-1.2 g/kg minimum. Push below that for more than a few weeks and hormones start to slide - testosterone, thyroid, menstrual cycle regularity for female athletes.
Prioritise omega-3 rich sources: salmon, sardines, walnuts, extra-virgin olive oil, chia and flax. If you don't eat fatty fish twice a week, a 2 g EPA + DHA supplement earns its price.
Micronutrients come from food, not pills. Aim for four colours on the plate every day - leafy greens, berries, peppers, citrus, tomatoes, carrots. Most lifters also under-eat fibre. Target 30-40 g a day for digestion and gut health.
— The template
04The 80/20 meal template
Forget weighing every gram forever. Build every plate with your hands as the ruler:
- 1 palm of protein (chicken, fish, meat, eggs, tofu)
- 1-2 cupped hands of carbs (rice, potato, pasta, oats, fruit)
- 1 fist of vegetables (any colour, any way you'll actually eat them)
- 1 thumb of fat (olive oil, nuts, avocado, cheese)
Build four of those a day. Hit your protein. The rest is noise. This one template covers 90% of what your body needs to train hard, recover, and grow.
— Common mistakes
05What we fix first with new Onyx athletes
- Under-eating protein at breakfast - fix with 3 eggs + Greek yogurt
- Training fasted 'to burn fat' - kills output, doesn't burn more fat over the day
- Zero carbs on lift days - wrecks last-set performance
- Weekend blowouts that erase Mon-Fri - use the 20% rule, not the 200% rule
- Chasing 'clean' instead of chasing enough - clean 1200 kcal is still 1200 kcal
The Cheat Sheet
Key takeaways
- 1Protein 1.6-2.2 g/kg, spread across 3-5 meals of 30-40 g
- 2Carbs 3-5 g/kg on training days, mostly around the workout
- 3Fats 0.8-1.2 g/kg minimum, prioritise omega-3s
- 4Palm-hand-fist-thumb template - stop weighing everything
- 5Adherence beats perfection - leave room for the foods you love

Written by
Simen Christiansen
Onyx Head Coach · Onyx Performance
