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Health and fitness tracking has never been easier, thanks to a wave of smart devices that measure everything from steps to sleep. One of the latest tools to hit the market is the Hume Body Fat Scale and Wrist Band — a connected system that promises to track your body fat, muscle mass, hydration, and more right from home.
But how does it work, and how accurate is it compared to a DEXA scan, the medical gold standard for body composition analysis?
The Hume Body Fat Scale uses Bioelectrical Impedance Analysis (BIA), a method that sends a harmless electrical signal through your body. Because fat, muscle, and water conduct electricity at different speeds, the device can estimate your body composition.
The Hume Wrist Band syncs with the scale and tracks heart rate, daily activity, and estimated calorie burn, feeding all the data into the Hume app.
Learn more about how BIA works from the NIH
Convenience — Check your stats daily without an appointment
Integration — App tracking keeps all your data in one place
Motivation — Frequent feedback helps maintain momentum
Affordability — Lower upfront cost than in-clinic scans
While convenient, the Hume system has limitations:
Hydration Changes Readings — Drinking water or working out before use can alter results
Positioning Matters — Foot placement and skin contact can affect accuracy
Estimates vs. Direct Measurement — BIA uses algorithms, not actual imaging
Activity Estimates Are Indirect — The wrist band bases calorie burn on heart rate and movement, not measured metabolism
Even Harvard Health notes that BIA devices often produce variable results depending on hydration and other factors.
Unlike BIA, DEXA scanning (Dual-Energy X-ray Absorptiometry) directly measures:
Fat mass
Lean muscle mass
Bone mineral density
Visceral fat (the dangerous fat around organs)
It’s unaffected by hydration or time of day, and it gives a full regional breakdown so you know exactly where changes are happening in your body.
Even the International Society for Clinical Densitometry recognizes DEXA as the most reliable body composition and bone health tool available.
The Hume Body Fat Scale and Wrist Band can be a helpful daily motivation tool — but for precise, consistent, and clinically reliable results, DEXA is unmatched.
Ready to see your true numbers? Book your scan today at DEXASCAN.com and track your progress with confidence.
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