We’ve all heard it before: “You’re born with all the brain cells you’ll ever have.” Turns out — that was wrong. Modern neuroscience now tells us our brains can grow new neurons well into adulthood.
A recent article points out that a protein called BDNF (brain-derived neurotrophic factor) plays a big role in neurogenesis — that’s just a fancy way of saying “making new brain cells.” Certain types of exercise can trigger the release of BDNF, which helps our brains keep up, learn, remember, and adapt.
So what are these exercises? The good news: they’re not exotic. They’re things you probably already do or could jump into easily. Here are three that neuroscientists are praising for brain cell growth — and how you can use them in your own life.
1. Resistance Training (Lifting or Bodyweight Strength Work)
Weightlifting, push-ups, squats, deadlifts — movements where you’re pushing or pulling against something — are powerful for more than just muscles. They trigger BDNF, help with brain repair, and protect memory.
You don’t need to be Benching unbelievable loads. Even moderate strength work, a couple times a week, can have an impact. The goal here is consistency. Over time, the cumulative effect of those sessions helps with cognition, focus, and memory.
2. Aerobic Movement (Cardio That Gets the Heart Rate Up)
Running, brisk walking, cycling — aerobic exercise increases blood flow to the brain, which delivers oxygen and nutrients. When you combine that with BDNF release, you’re doing more than just burning calories. You’re helping your brain grow.
Even walking briskly for 20–30 minutes a few times a week helps. If you’re busy, break it up: walk in the morning, then after lunch, or right after work. Little bits add up.
3. Dual-Task Exercises & Leg-Focused Moves
“Dual-task” means doing something physical and mental at the same time — think walking while holding a conversation, or dancing, or doing footwork while solving a puzzle in your head. These help activate more parts of your brain.
Leg exercises (like squats, lunges) also matter. Strong legs do more than give you power and mobility — they help with brain health, too. One twin study found that the twin with stronger leg strength was less likely to develop Alzheimer’s — even after adjusting for other factors.
Putting It All Together: What You Can Do This Week
- Add one strength-session this week (bodyweight or weights) — even 20-30 minutes.
- Go for two brisk walks or jogs. Maybe do one outdoors if possible.
- Choose a dual-task movement: walk while talking, dance to a new song, or do balance work with something on your mind.
Also, make sleep, recovery, and good nutrition part of the plan. New brain cells are great — but they need good habitat (rest, fuel, low stress) to survive and plug in.
Your brain isn’t fixed. It’s more plastic than you think. Want sharper memory, clearer thinking, and better learning as you age? The same workouts that build your body can build your brain.