Educational tool — not a diagnosis. VivMetric calculators estimate body and fitness metrics using CDC, WHO, and NIH reference formulas. They do not provide medical advice, diagnosis, or treatment.
Always consult a licensed healthcare provider for medical concerns. If you are in emotional distress or thinking about harming yourself, contact the 988 Suicide & Crisis Lifeline (call or text 988, US, 24/7) or see the WHO mental-health resources.
Fitness Goal Decision Guide
Fat loss, muscle building, general health, and performance call for different metrics and different pacing. This short guide matches your goal and experience to a concrete plan.
The four paths
Fat loss: modest deficit (~500 kcal/day), track body fat %, expect 0.5-1% body weight per week. Muscle: small surplus, 0.25-0.5% per week, track lean mass. Health: prioritize waist measures. Performance: leaner composition plus fueling.
Why tracking matters
What gets measured gets managed. Choosing the right 2-3 metrics for your goal beats weighing yourself daily - it shows real progress and catches problems early.
Frequently Asked Questions
Which metric should I track for fat loss?
Body fat percentage (every 4-6 weeks) plus waist-to-height ratio. The scale alone can mislead when you are gaining muscle while losing fat.
How fast can I lose fat and build muscle at the same time?
Beginners (first ~12 weeks) can do both simultaneously. Beyond that, most people focus on one goal at a time for meaningful progress.
This tool provides educational health metric estimations only. It is not medical advice, diagnosis, or treatment. Always consult a licensed healthcare provider for medical concerns.