Can Sprinting Really
Improve Bone Density?
As we get older, one of the most common symptoms you always hear about with aging...

Is the fact that year by year, our bones gradually lose their density...

Becoming more and more brittle and fragile.

Until we eventually suffer a fall and break something.  

The good news is, there are plenty of ways to counteract this trend, to stay strong and healthy in your later years.  

Proper diet is one.  Load bearing exercises such as squats and deadlifts are another.  

But these are the ones that most people in the health and fitness industry already know about.  

The much lesser known trick to maintain bone density is:

Regularly exposing your body to higher G-forces.  

You see, at rest, your body experiences 1G of weight, which is the normal weight of gravity.  

In outer space, where there’s no gravity, the G-force is 0.  

Interestingly enough...

Astronauts on missions suffer terrible losses in both bone density and muscle mass in just a few short days!

With sprint training on the other hand...

You regularly expose your entire skeletal frame to impact forces as much as 5x the force of gravity…

Sending a message to your brain saying:

Hey! Let’s keep these bones as strong and dense as possible, because we’re going to need them to keep on living.

Make sense?  Now up next...

Where Do the G-forces Come From?

The answer here isn't so obvious, is it?  

So let me explain.  

You see, when accelerating forward at lower running speeds...

The foot strikes the ground somewhere behind the body's center of gravity. 

As such, the impact of the strike is not so high, because most of your bodyweight is already out in front of you.  

However, once you reach a certain threshold of speed...

The body needs to start striking the foot out ahead of the center of gravity.  

And here's why:

As you've surely heard before in high school science:

For every ACTION, there is an equal and opposite REACTION. Correct?  

Well at high running speeds...

The REACTION is a push off the ground that is powerful enough to at least maintain your forward speed.  

But in order to achieve this reaction...

The body must first generate and equally strong ACTION, in an extremely short time...

By driving as much weight as it can, down into the ground.  

And it does so by striking the foot out ahead of the center of gravity...

Using your body weight and high forward momentum to generate that 5G force down in just a split second.  

And that one trick also happens to be the reason that regular sprinting keeps your bones strong and healthy as you age.   

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