Can You Control How Your Muscles Grow?

The human machine is a trophy of evolution optimized for broad ranges of speed and motion. We are muscle powered machines. Yet unlike skin cells that regrow every day, growth in muscle fiber numbers is limited to the prenatal and immediately postnatal period. The number of muscle fibers you’re born with is how many you’ll have your entire life. If we can’t grow new muscles fiber, how can do athletes enhance their bodies?

"The number of muscle fibers you’re born with is how many you’ll have your entire life."

Exercise and resistance training are your primary tools to control muscle conversion. Instead of growing new fibers, your body’s fibers adapt based on different Training Zones. Atlas Training Zones are based off the most recent science and are determined by metrics such as rest time, rep count, and training velocity. Training in different Zones triggers a biological response that drives muscle growth and adaptation. Controlling factors like type, intensity, duration, and speed gives you the ability to mold your future self in less than 9 weeks.

A keystone comparison is sprinters vs marathoners. Can you spot the differences in muscle definition?

There are three types of muscle types:

Slow-twitch fibers have slow speeds of contraction and are typically smaller in diameter.

Fast-twitch fibers have fast speeds of contraction and are typically larger in diameter.

Intermediate fibers have a fast speed of contraction. They are colloquially a hybrid fiber.

How do some athletes get bigger muscle definition while others get lean and toned musculature? By controlling their training regimen. You are what you eat, you are how you train.

By targeting specific Training Zones you can maximize control: to look like Usain Bolt, you train like Bolt. To look like Jemima Sumgong, you train like Sumgong.


To help get you there, Atlas Wearables created a Training Zone algorithm designed to help you get the results you want. Our algorithm constantly evolves as new data comes in.

We’ve digested the data science to help you control training velocity, rep volume, and rest time so you can reach your goals faster.

For example, if you’re trying to burn fat, do more reps at a slower speed, and take less rest. But if you’re trying to build mass, rest more and do less rest, but when you lift, be explosive.

For the first time ever, you can control the future of your body.

Yours in Health,
Peter Li