Arnold's Pump Club reveals why 6 minutes of hard work works better for the brain than hours of running!

If you subscribe to Arnold Schwarzenegger's newsletter , Arnold's Pump Club, you know that he often focuses not only on muscle, but also on overall longevity. In a recent issue, there was a fascinating finding that completely changes the way we look at how to exercise for brain health.

Most of us worry about losing our memory in old age. But Arnold's team points out an uncomfortable fact: this process doesn't start in retirement, but in our thirties. Our hippocampi (memory centres) can shrink by 1-2% a year. But the good news is that there is a way to reverse this process - and it takes less time than you might expect, according to the newsletter.

A miracle fertiliser for the brain

The magazine article explains that the key to protecting the brain is a protein called BDNF (brain-derived neurotrophic factor). Scientists often call it the "Miracle-Gro" (miracle fertilizer) for the brain because it helps neurons grow, survive and make new connections.

It has long been known that exercise increases BDNF levels. But Arnold's Pump Club brought data from a new study that compared different types of exercise. The result was shocking:

Just 6 minutes of high-intensity exercise increased BDNF levels 4 to 5 times more than 90 minutes of light exercise.

In other words: When it comes to the health of your brain, short and brutal intensity absolutely rolls over long hours at a "leisurely pace." Even fasting (starvation), which is popular in the biohacking community, didn't have such an effect on BDNF.

Why does "pain" work?

According to Arnold's magazine, it's lactate. When you work so hard that your muscles burn, your body produces lactate. It travels through the blood to the brain, where it acts as a trigger to release BDNF. With light exercise, this "biological switch" just doesn't turn on hard enough. Thus, the brain responds more to challenge and discomfort than duration.

Recommendations from the newsletter.

Based on this study, Arnold's team gives clear advice on how to exercise to keep your mind sharp:

1. It's not for every day: just incorporate 1 to 2 workouts a week.
2. Go for the grind: You need to get to a state where you're breathing so hard that it's impossible to speak.
3. Watch your heart rate: Aim to reach about 80% of your maximum heart rate (you can easily find this by subtracting your age from 220).

So the message from Arnold's Pump Club is clear: Don't be afraid to give yourself a good "workout" once in a while. Those few minutes of discomfort are a small toll that will keep your brain in shape for decades to come.