If you didn’t already know you have different types of muscle fibers in your body, now you do. And depending on how you exercise or what sports you enjoy, you’re building and recruiting some ...

Muscle fibers are divided into three types: slow twitch (type I) or red fibers due to the large number of mitochondria they possess, fast twitch (type IIb) or white fibers and intermediate (type IIa).

To overcome this issue, Ng and colleagues decided to examine the fiber distribution by using mass spectrometry imaging (MSI), which can capture high resolution images of intact frozen muscle sections.