Why am I losing muscle even though I'm eating enough protein?
Many people assume that eating more protein is the key to maintaining muscle as they age. While protein is certainly important, it isn't the whole story.
Beginning around midlife, our muscles gradually become less responsive to the normal signals that tell them to use the protein we eat. Researchers call this anabolic resistance—a natural age-related decline in the muscles' ability to stimulate muscle protein synthesis.
In other words, your muscles may still receive the building blocks they need, but they're no longer listening to the message as efficiently.
That's why preserving muscle isn't only about eating more protein.
It's also about improving the signals your muscles receive.
Understanding Anabolic Resistance
Our bodies are designed to constantly rebuild muscle.
When we're younger, a meal containing adequate protein is usually enough to stimulate muscle repair and growth.
Over time, however, those signaling pathways become less responsive. The muscles require a stronger stimulus before they fully activate the machinery responsible for building and repairing tissue.
This is one reason maintaining strength becomes more challenging with age—even for people who eat well.
A Surprisingly Simple Strategy
Integrative physician Dr. Frank Shallenberger has discussed a remarkably simple technique that may help improve this signaling.
Before eating a protein-rich meal, perform about 7 to 10 seconds of strong muscle contraction.
Examples include:
- Holding a wall sit
- Standing from a chair without using your hands
- Performing a brief squat
- Pushing firmly against a wall
- Holding a strong isometric contraction with your legs or arms
The goal isn't exercise.
The goal is creating a brief but meaningful signal that tells your muscles:
"Pay attention. You're about to receive nutrients."
Why This May Work
Muscles aren't passive tissue.
They're constantly listening to biochemical signals that tell them whether to grow, repair, conserve energy, or gradually shrink.
A brief contraction activates many of those signaling pathways before the protein ever arrives.
When the amino acids from your meal enter the bloodstream, the muscles may be better prepared to use them.
Think of it like turning on the lights before guests arrive.
The meal provides the building materials.
Movement opens the door.
A Simple Protocol
Before your next protein-rich meal:
- Perform one strong muscle contraction for about 7–10 seconds.
- Eat 25–40 grams of high-quality protein, depending on your needs.
- Continue moving throughout the day to reinforce the message that your muscles are still needed.
For older adults, this simple combination of movement and nutrition may help support muscle preservation far more effectively than protein alone.
The Bigger Lesson
This isn't really a story about protein.
It's a story about communication.
One of the central ideas behind Signals Beneath the Surface is that the body is always communicating.
Hormones communicate.
The nervous system communicates.
The immune system communicates.
Even muscles communicate.
Protein provides the raw materials.
Movement provides the signal.
Together, they create the biological conversation that helps your body preserve strength, maintain independence, and continue adapting as you age.
Sometimes the question isn't whether your body has what it needs.
Sometimes it's whether your body has received the signal to use it.
Practical Tip
Before your next protein-rich meal, take just 7–10 seconds to perform a strong wall sit, chair stand, squat, or isometric contraction.
It costs nothing.
It takes almost no time.
And it may be one more way of reminding your muscles that they're still needed.
References
Shallenberger, F. Integrative medicine discussions on anabolic resistance and muscle activation.
Moore DR, Churchward-Venne TA, Witard O, et al. Protein ingestion to stimulate myofibrillar protein synthesis requires greater relative protein intakes in healthy older versus younger men. J Gerontol A Biol Sci Med Sci.
Cuthbertson D, Smith K, Babraj J, et al. Anabolic signaling deficits underlie amino acid resistance of wasting, aging muscle. FASEB Journal.
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