How to Actually Approach Body Composition as an Athlete

If you train hard, juggle work, family, and life stress, and still want to perform at a high level, body composition can feel like a constant mental tug-of-war. Should you be bulking? Cutting? Or just… stuck somewhere in between?

Here’s what you actually need to know.

Can You Lose Fat and Gain Muscle at the Same Time?

This is the question everyone asks and the one most people get wrong.

In theory, yes, it can happen. In reality, for most trained athletes, these goals fight each other.

Fat loss requires a calorie deficit. Muscle gain requires at least maintenance, and more often a surplus. Trying to push both hard at the same time often leads to spinning your wheels: training feels flat, recovery suffers, and progress stalls.

The rule of thumb is simple: pick the goal that moves the needle most right now.

• If you’re carrying a noticeable amount of excess fat mass, prioritising fat loss will improve efficiency, confidence, and performance.
• If you’re already lean and struggling to get stronger, muscle gain might be the better focus.
• And crucially, these phases should be periodised across the year, ideally away from key races or events.

How Do You Know If You Should Cut?

You don’t need to obsess, but having some objective data helps.

DEXA scans are the gold standard if budget allows, but InBody scans or consistent scale trends can give useful insight. Often, athletes fall into two camps:

The “just a couple of kilos” crowd
If you’re close to where you want to be, you may not need a formal cut at all. Many athletes lean out naturally by eating at maintenance, show up well-fuelled, and training with intent.

The honest conversation group
If there’s more than ~3kg of fat mass to lose, prioritising a controlled deficit will improve almost every performance metric - from heart rate to joint stress to confidence.

If fat loss is the goal, aim for no more than ~1% of bodyweight lost per week. Faster than that, and you risk losing muscle, disrupting hormones, and sabotaging training quality.

Bulking Without Getting Sloppy

Bulking doesn’t mean eating everything in sight and “fixing it later”.

Any weight you gain should improve your ability to perform - not just push the scale up.

For most athletes:

• A 5–10% calorie surplus is more than enough
• Progress should be tracked over weeks, not days
• The goal is lean mass, not uncontrolled fat gain

In terms of expectations, muscle gain is slow. Very slow.

A strong benchmark is ~1% of bodyweight gained per month. That’s excellent progress. Anything faster usually comes with unnecessary fat gain and a frustrating cut later.

This is where structured strength work matters. Progressive lifts, smart exercise selection, and enough recovery are what actually signal your body to build muscle.

Cutting Without Killing Performance

Cutting doesn’t have to mean misery - but it often does when done badly.

The biggest mistakes?

• Slashing calories too aggressively
• Adding more training on top of an already demanding load
• Trying to lean out close to an A-race

This combination leads to chronic under-fuelling, poor recovery, injury risk, and burnout. The best time to cut is far away from your key event, when training volume is lower and stress is more manageable.

Progress won’t be linear. Scale weight fluctuates with carbs, salt, sleep, and stress. Look at trends, not day-to-day noise.

Any progress is progress.

Why Maintenance Is the Most Underrated Phase

Maintenance gets a bad reputation, but it might be the smartest choice for most athletes.

When calories match output, recovery improves. Training quality goes up. Strength numbers creep forward. And often, fat loss happens by accident as efficiency improves.

Maintenance shifts the focus from aesthetics to performance, and paradoxically, that’s often when body composition improves the most.

Chase better lifts. Chase faster splits. Chase consistency.

Let your body adapt.

Omnia’s Gold Coaching combines personalised training, nutrition support, and accountability.

Final Takeaway

Bulking, cutting, and maintenance are tools and not identities. The athletes who make the best long-term progress are the ones who stop chasing shortcuts and start matching nutrition to training demands.

Fuel performance first.
Be patient with body composition.
And pick the phase that actually serves your goals right now.

If you want help figuring out which phase you’re in and how to execute it properly Omnia’s got you covered.

Looking to gain strength without wrecking your endurance?
Check out Omnia’s Strength + Endurance Training Plans, built specifically for hybrid athletes.