Precerpt from Grandma Ninja's Training Diary: The Brain That Moves Stays Young
When I lace up my shoes and start moving — whether it’s climbing, sweeping, or hauling groceries — I’m not just training my body. I’m training my brain to stay young. Scientists have found that exercise acts like fertilizer for the brain. It boosts blood flow, feeds neurons, and encourages the growth of new connections. Aerobic movement — walking, swimming, dancing — increases the size of the hippocampus, the part that handles memory and learning. Resistance training strengthens not only bones but also the networks that keep attention sharp and emotions steady. In short, movement tells the brain: you’re still needed. The Lancet calls this “neuroprotection through fitness.” It’s the body’s way of defending the brain against age-related decline. Long-term studies show that people who stay physically active have better cognitive function and more resilient brain structure as they age. The brain literally looks younger on scans — more volume, more connectivity, more spark. That’s why...