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What is lean body mass (LBM)?

If you ever have someone do your body composition with a body fat test please take the Lean Body Mass with a grain of salt.  As mentioned above, lean body mass is everything mentioned.  Therefore a decrease in lean body mass does not mean you are losing muscle, it could simply be less water or a reduction in intermuscular fat that cannot be measured with a caliper reading.

Always judge your lean muscle based on your performance in the gym and nothing else!

Lean body mass is composed of all of the muscles, organs, bones, tissues and water in the body excluding fat.

We tend to think of muscle when we hear lean body mass.  LBM certainly includes our muscle mass, but also includes everything else our body is made up of other than fat.  This includes bones, muscles, blood, water, and organs.  

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.