Body Fat Percentage Tells You What the Scale Refuses To
Weight alone is the wrong number to track. You can lose six pounds of skeletal muscle and gain three pounds of adipose and have the scale show net improvement while your metabolic health moves in the wrong direction. Bioimpedance scales like the Omron HBF-516B and Tanita BC-533 exist precisely to get past that ambiguity — and this template captures their full output in a structured daily log.
The Body Fat % field carries the reference range right in the hint field: 11.0 to 21.9 for normal adult males. That range sits in the record alongside every reading, which means you're not consulting a chart; you're reading in clinical context every time you open the entry.
The Visceral Fat Score Is the Metric Most People Skip
Visceral Fat is scored as an integer with a threshold hint of less than 10 for normal. Most consumer bioimpedance users look at body fat percentage and move on. Visceral fat is the number that metabolic clinicians care about — it's the deep abdominal adipose surrounding the organs, not subcutaneous fat, and it tracks cardiovascular and insulin resistance risk independently of total body fat percentage.
A person at 18% body fat with a Visceral Fat score of 12 has a materially different metabolic risk profile than a person at 22% body fat and Visceral Fat of 7. The numbers don't tell the same story. Having both fields in the same timestamped entry means you can watch the visceral fat score move independently of body fat percentage across a training block or dietary intervention — which it frequently does.
RM kcal — resting metabolic rate in kilocalories — is the Tanita's calculated output based on measured body composition. It changes as skeletal muscle mass changes, which is the point: if your RM kcal is trending up over 12 weeks while body fat percentage holds or decreases, your metabolic adaptation is moving in the right direction. This is the number that diet planning should be calibrated against, not generic TDEE estimators.
Scale Source Context Preserved in Every Entry
The Scale field — TANITA, OMRON, or Detector YMCA Analog — matters more than it looks. Different bioimpedance technologies use different electrode configurations and frequency ranges, which produce systematically different readings. An OMRON arm-to-arm impedance reading and a Tanita foot-to-foot reading will not produce the same body fat percentage for the same person on the same day.
Logging the scale used in every entry means you can filter by device and analyze trends within a consistent methodology, rather than across different measurement technologies that produce incomparable numbers. If you switch from OMRON to TANITA at month three, the filter isolates each dataset and shows you which device you've been using when you're looking at a trend chart.
Clothing at Weight — Clothed or Nude — captures the weighing condition that most people treat as irrelevant until they can't reconcile two readings taken in different states. A clothed reading with typical gym clothes adds roughly 0.5 to 1.5 lbs depending on season. Over six months of mixed conditions that noise accumulates into an unreadable trend line. The field enforces consistency by making the condition explicit in the record.
BP Reading Date as a separate date field from the main Date/Time entry handles the real-world situation where blood pressure readings don't happen on the same day as body composition measurements. The record stays complete and accurate rather than forcing a conflated entry that misrepresents the measurement timing.