Lengthening Muscles by 10% to 20%, is that possible?

How Much Can a Muscle Lengthen During Stretching?

The lengthening of a muscle during stretching can vary depending on several factors, such as the individual’s flexibility, the type of stretch being performed, and the duration of the stretch. However, in general, a stretched muscle can be lengthened anywhere from 10-20% more than a contracted muscle.

For someone who does not regularly stretch, their muscles may be tighter and less flexible, which can limit the amount of lengthening that occurs during stretching. It is important to note that stretching should be done gradually and gently, without pushing the body beyond its limits, to avoid injury.

Stretching can provide many benefits, such as an increased range of motion, improved flexibility, and reduced risk of injury. It is recommended to incorporate stretching into a regular exercise routine, but it is important to consult with a healthcare professional or certified fitness trainer to ensure proper technique and safety.

There are several studies that have examined the effects of stretching on muscle length. Here are a few examples:

  • A study published in the Journal of Applied Physiology found that a single bout of stretching increased hamstring muscle length by an average of 5.7%. The study also found that stretching improved flexibility and reduced stiffness in the hamstring muscles.
  • Another study published in the Journal of Strength and Conditioning Research examined the effects of static stretching on hip flexor muscle length. The study found that stretching increased hip flexor muscle length by an average of 13.7%.
  • A review article published in the International Journal of Sports Physical Therapy examined the effects of different types of stretching on muscle length. The article found that static stretching, which involves holding a stretch in a fixed position for a period of time, can increase muscle length by up to 20%.

Overall, these studies suggest that stretching can increase muscle length by anywhere from 5-20%, depending on the type of stretch and the muscle group being stretched. However, it is important to note that individual results may vary and that stretching should be done safely and gradually to avoid injury.


Visit for more information, also visit Stretch Authority’s YouTube Channel for Current Videos

Table of Contents

Have Any Question?

We are here to help. Feel free to contact us now and we’ll respond as soon as possible.

Follow Us on

Unlock a Free Stretch Session at Stretch Authority!

No-Strings attached! Get a free 30-minute Stretch Session. This offer for New Customers only. 

2024 Stretch Authority, LLC. All Rights Reserved