What are surface area and volume measurements in Styku, and how should I interpret them?

Overview

Styku reports both surface area (the 2D outer shape of the body) and volume (the 3D space occupied by muscles, fat, and other components). Both whole-segment and regional measurements are provided. Together, they reveal not just how much the body is changing, but how it is being reshaped.

How to Interpret These Measurements

Metric | What it measures

**Volume** | The 3D space a body region takes up internally

**Surface area** | The 2D outer surface of a body region

Key insight — volume can stay the same while surface area changes: When a client loses fat and gains muscle (body recomposition), their total volume may remain similar because muscle has replaced fat. However, surface area tends to decrease as the body becomes more compact and defined.

Practical example:

• Arm A — more muscle, less fat → looks firmer and tighter → smaller surface area
• Arm B — more fat, less muscle → looks rounder and puffier → larger surface area despite similar volume

Using These Metrics in Client Conversations

• If a client's weight hasn't changed much but they look and feel different, surface area reduction is a compelling way to show real progress.
• Use regional measurements to highlight specific areas where reshaping is occurring.
• Pair surface area and volume trends together for the clearest picture of body change over time.

Notes

• Styku's measurements achieve millimeter-level accuracy, which is not achievable with traditional manual methods.
• These metrics are scientifically validated.

If this resolves your issue, no further action is needed.

If the problem persists, contact support and include: the client's scan date, scan ID, and which segment or region is displaying unexpected values.

Applies to: All Styku configurations.