For years, exercise has been associated with better brain health. But newer research is revealing something more specific and compelling:
Weight training—especially lower-body resistance training—may play a major role in protecting the brain against cognitive decline and Alzheimer’s disease.
This is not simply about burning calories or staying “fit.”
Your muscles, especially the large muscles of the legs and hips, function like an endocrine organ. When properly trained, they release signaling compounds called myokines that directly influence the brain, inflammation, metabolism, circulation, and even memory centers such as the hippocampus.
Your muscles, especially the large muscles of the legs and hips, function like an endocrine organ. When properly trained, they release signaling compounds called myokines that directly influence the brain, inflammation, metabolism, circulation, and even memory centers such as the hippocampus.
The New Research
A newer 2025 study published in GeroScience examined older adults with mild cognitive impairment—often considered a precursor to Alzheimer’s disease.
Participants performed resistance training twice weekly for six months using exercises such as:
- Leg press
- Leg extensions
- Leg curls
- Chest press
- Rowing movements
The results were impressive:
- Improved memory and cognitive performance
- Better preservation of brain tissue
- Reduced shrinkage in areas associated with Alzheimer’s disease
- Improved white matter integrity and communication pathways within the brain
Researchers specifically noted protection in the hippocampus, one of the first regions affected in Alzheimer’s disease.
Another large 2024 study involving data from the UK Biobank found that individuals with greater muscle strength had a significantly lower risk of developing neurodegenerative diseases, including Alzheimer’s disease.
Why the Legs Matter So Much
The legs contain some of the largest and most metabolically active muscles in the body.
Training them creates a powerful systemic response that may help:
- Increase BDNF (Brain-Derived Neurotrophic Factor)
- Improve insulin sensitivity
- Reduce chronic inflammation
- Improve circulation and oxygen delivery to the brain
- Support mitochondrial function
- Increase production of protective myokines such as irisin
- Preserve mobility and independence with aging
In foundational medicine, this makes perfect sense: the body sends signals, and the brain responds.
The body thrives on signals.
When a muscle receives the right stress in the right amount, the body responds with adaptation, repair, and resilience.
When a muscle receives the right stress in the right amount, the body responds with adaptation, repair, and resilience.
What This Means Practically
I started weightlifting at twelve and have had a gym membership since 1993. I also spent many years as a professional drug-free bodybuilder and personal trainer. I share this background because the findings of this newer research strongly align with what I have personally witnessed for decades: properly performed strength training does far more than build muscle—it builds resilience throughout the entire body, including the brain.
As humans, we naturally follow the path of least resistance, which is why tracking your workouts is so important. Without structure, many people either stop progressing, overtrain, or attempt weights that are too heavy and increase the risk of injury.
You do not need to train to exhaustion to receive the benefits. Use weights you can control safely, focus on consistency, and make gradual progress over time. If you are new to resistance training, hire a qualified trainer or work with someone you trust to learn proper form. Most importantly, schedule it into your week like any other important appointment. Your future brain and body may depend on it.
Back to the research, which continues to support resistance training approximately 2–3 times per week, focusing especially on lower-body movements such as:
- Squats
- Leg press
- Lunges
- Step-ups
- Romanian deadlifts
- Calf raises
- Split squats
This is good advice, but do not skip your upper body; we need these muscles for our activities of daily living.
Even in older adults, properly programmed strength training appears capable of improving both physical and cognitive outcomes. It is never too late.
A Bigger Takeaway
For decades, brain health conversations focused almost entirely on puzzles, medications, or genetics.
But modern research is showing that the muscles and brain are deeply connected.
The message is becoming clearer:
Protect your legs to help protect your brain.
And in many ways, one of the most overlooked anti-aging tools may simply be intelligent strength training performed consistently over time.
This is one of the major reasons I created the Foundational Signals™ programs. Healing is not simply about taking more supplements or chasing symptoms — it is about restoring the right signals in the right order. Movement, muscle, nervous system regulation, sleep, stress adaptation, and metabolic health all communicate with the body continuously, and when those signals improve, the body can begin functioning the way it was designed to.
If you want to better understand how these foundational signals impact healing, metabolism, energy, inflammation, brain health, and long-term resilience, the Foundational Signals™ programs were designed to help guide you step-by-step.
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References
- Resistance Training and Cognitive Protection in Mild Cognitive Impairment. GeroScience, 2025.
- Heavy Resistance Training Preserves Muscle Function in Older Adults. BMJ Open Sport & Exercise Medicine, 2024.
- Muscle Strength and Neurodegenerative Disease Risk. Neurology / UK Biobank Analysis, 2024.
- Exercise-Induced Myokines and Brain Health Review. Frontiers in Aging Neuroscience, 2024.
