Definition
Fat-free mass refers to the total body mass minus the fat mass. It includes muscle, bone, organs, water, and everything else that is not fat content.
Explanation
- Fat-free mass makes up 60-80% of total bodyweight for fit healthy people. Higher fat-free mass equals lower body fat percent.
- Resistance training and proper protein intake builds fat-free muscle tissue leading to greater caloric needs for energy and metabolism.
- Women have 10-15% less fat-free mass on average compared to men. But training reduces this gender gap.
- Athletes and bodybuilders aim for high fat-free mass with low body fat. A DEXA scan helps track changes in fat-free mass.
Examples
- Comparing the fat-free mass of a 120lb person at 95lbs vs. an obese 120lb person at 80lbs fat-free mass.
Related Terms
- Lean body mass, muscle mass, body composition testing
Common Questions
- How can I increase fat-free mass? Follow a high protein diet and do regular strength training.
- Why is fat-free mass important? It boosts metabolism, controls weight and body fat levels, and improves health.
Do Not Confuse With
- BMI – A flawed measure that doesn’t distinguish fat vs. fat-free mass.
- Lean body weight – Essentially the same meaning as fat-free mass.
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