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Harsh Sinha
November 29, 2025

How to Find Out If You’re Really Building Muscle

Find out if you are really building muscle using DEXA Scan body composition data, strength tracking, and evidence based progress indicators.

Author
5 min read
How to Find Out If You’re Really Building Muscle

Building muscle takes time, consistency, and the right strategy, but one of the hardest parts is knowing whether your training is actually working. Your weight may stay the same, your pump may look good some days, and your clothes may feel different, but none of these are reliable indicators by themselves.

At Kalos, we help clients track real muscle growth using highly accurate DEXA Scan data. When you measure lean mass directly, you do not have to rely on guessing, mirrors, or gym bro science.

Here is how to know with confidence if you are truly building muscle.

Why It Is Hard to Tell If You Are Building Muscle

Muscle grows slowly, especially for anyone who is not a complete beginner. You may gain:

  • 0.25 to 0.75 lbs of lean mass per week at best
  • Sometimes less depending on experience

That is so subtle that you will not see it clearly in the mirror or on the scale for weeks. Water retention, pump, food weight, and glycogen all make visual tracking extremely unreliable.

You need objective feedback.

The Most Accurate Way to Know: A DEXA Scan

A DEXA Scan measures your lean mass precisely in:

  • Arms
  • Legs
  • Trunk
  • Total body

This makes it the most reliable method to confirm:

  • Whether muscle is increasing
  • Where it is increasing
  • Whether strength training is working
  • Whether your nutrition plan supports muscle growth

If your lean mass goes up on a DEXA scan, you are building real muscle. No other method is as consistent or accurate.

Signs You Are Building Muscle (Backed by Data)

1. Lean Mass Is Increasing on a DEXA Scan

This is the gold standard. Even small changes matter.

2. Strength Is Increasing

If you are getting stronger in compound lifts, you are likely building muscle.

Examples include:

  • More reps with the same weight
  • Higher weight with good form
  • Better performance across sets

Strength alone does not guarantee muscle growth, but it strongly correlates with it.

3. You Are Recovering Faster

Improved recovery and less soreness after similar workouts indicate improved muscle adaptation.

4. You Are Eating Enough Protein and Calories

If you consistently hit your protein and calorie targets, conditions for growth are present.

5. Your Training Is Progressive

Progressive overload is essential.

You should consistently increase:

  • Weight
  • Reps
  • Sets
  • Time under tension
  • Technique quality

Signs You Are Not Building Muscle

You may not be building muscle if you notice:

  • No increase in lean mass on DEXA scans
  • Strength plateaus lasting months
  • Poor recovery
  • Low protein intake
  • Poor sleep quality
  • Training without structure
  • Being in too large a calorie deficit

These issues often show up in composition data long before you see them physically.

The Best Ways to Track Muscle Growth

1. DEXA Scan (Most Accurate)

Measures lean mass changes directly.

2. Performance Tracking

Record your lifts, reps, and weights weekly.

3. Progress Photos

Not reliable alone, but useful over long periods.

4. Measurements

Arms, legs, and torso measurements can show changes, though they include fat and water.

5. Strength Consistency

If strength goes up while body fat goes down, you are likely building muscle efficiently.

Why Muscle Growth Requires More Than Training Hard

Muscle building depends on:

  • Adequate protein
  • Sufficient calories
  • Proper sleep
  • Consistent progressive overload
  • High quality recovery
  • Stress management

A DEXA scan shows whether all of these variables are working for or against you.

Real World Example

A Kalos client trained four times a week but was unsure whether they were gaining muscle. Their first DEXA scan showed baseline lean mass. After increasing protein intake, improving sleep, and structuring their training for progression, their next scan showed:

  • 3.8 lbs lean mass gained
  • No fat gain
  • Improved symmetry and limb balance

They were finally able to confirm real muscle growth instead of guessing.

The Bottom Line

You cannot trust the scale or the mirror to tell you whether you are building muscle. The most reliable way to know is through DEXA Scan analysis backed by strength tracking and consistent nutrition.

When you measure your progress objectively, you stay motivated, avoid wasted effort, and make smarter decisions that lead to long term transformation.

Book Your DEXA Scan with Kalos Today in Downtown San Francisco or Palo Alto!

If you are ready to take control of your health with the most accurate body composition analysis available, it is time to book your DEXA scan at Kalos. Whether you are looking to get lean, build muscle, improve performance, or optimize longevity, our advanced technology and expert guidance will help you get there.

Schedule your scan today at Kalos, your journey to data-driven fitness starts now.

Schedule your DEXA scan today!

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