The Complexities of Measuring Body Fat
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Posted: August 01, 2025
Watch Time: 10:41 minutes
Posted: August 02, 2025
Watch Time: 10:41 minutes
Hosted By:
By Dr. Barry Sears
Founder & President, Zone Labs
Mary Perry
Clinical Trials Director, Zone Labs
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Summary
Body fat—not BMI—is the true predictor of your risk for heart disease and early death. But most accurate methods like underwater weighing or DEXA scans aren’t exactly bathroom-friendly. In this video, Dr. Barry Sears explains why BMI often gets it wrong and introduces a better at-home solution: the Body Fat Calculator at ZoneLiving.com.
Learn how this tool, based on gold-standard research, can help you understand your true body fat percentage and how much protein you need to preserve lean muscle. The best part? Once you know your numbers, the Zone Diet and ZoneRx Foods can help you reduce excess fat, gain muscle, and activate AMPK—your body’s master switch for burning fat efficiently.
Topics We Discuss:
[2:15]- The best interventions for longevity
[4:45]- The marginal decade and the centenarian decathlon
[8:00]- Peter’s personal list of events for his “centenarian decathlon” and how he helps patients create their own list
[15:00]- Determining your fitness goals early in life in preparation for the marginal decade, metrics to track, and more
[24:15]- How does playing sports like tennis, basketball, or golf fit into training for the centenarian decathlon?
[27:45]- Training within the four pillars: minimum effect dose, how to split your time, and other considerations
[33:45]- Advice for the older person and why it’s never too late to start
[36:15]- Bone mineral density and other female-specific concerns and considerations
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