What “Muscle Score” means

Think of it as a lean-mass adequacy check. It doesn’t judge your appearance — it estimates whether you likely have under, enough, or above-average lean mass relative to your body size and frame.

What the model is doing

• Uses your body fat % to estimate fat mass vs lean mass.
• Adjusts interpretation using body type (frame tendency).
• Compares your estimated lean mass to a target range for your height/sex/frame.

Body fat % matters a lot — two people can weigh the same but have very different lean mass.

Getting the most accurate result

• Use a body fat % estimate that’s reasonably realistic (not “best case”).
• Measure height correctly (no shoes, stand tall).
• Use a morning body weight if you want consistency.
• If unsure about body type, use the Body Type (Frame) calculator first.

How to use your score

• If low: focus on progressive resistance training + sufficient calories.
• If average: maintain or slowly build with structured training blocks.
• If high: your lean mass is likely strong for your frame — refine goals (strength, aesthetics, sport).

Why “body type” is included

Two people at the same height can carry muscle very differently because of frame structure. Body type helps prevent unfair comparisons between naturally smaller frames and naturally larger frames.

Limitations (important)

• This is an estimate — it doesn’t measure muscle directly.
• Body fat % input is the biggest source of error.
• Hydration, glycogen, and recent food intake can change scale weight.
• Not medical advice and not a diagnosis tool.