Importance of strength training for tendons

tendons are your bodys springs

achilles tendon , common tendon injury site Tendons play a critical role in transmitting forces from muscles to bones, enabling efficient movement and locomotion.

The ability of tendons to adapt to mechanical load is essential for their proper functioning and resistance to injury. In the 2022 article by Lazarczuk, the author explores how  healthy lower limb tendons adapt to strength training . This summary aims to provide an overview of the key findings and insights presented in the article.

What happens in the tendon with strength training ?


What should i do ?

Regular loading stimulates the alignment and realignment of collagen fibers along the lines of force, enhancing the tendon’s ability to resist tensile forces and improving its mechanical properties. Moreover, exercise-induced mechanical loading promotes the development of a more organized hierarchical structure within tendons.

Not only does resistance training affect the collagen quality and structure but it also influences another important component of the tendon , the  extracellular matrix (ECM) components. The ECM of tendons consists not only of collagen fibers but also  proteoglycans, and elastin.

strength training influences the synthesis, organization, and turnover of these tendon components. Increased loading can lead to an increase of collagen production, resulting in the remodeling and strengthening of tendon tissue.

Mechanical Properties and Adaptation

tendons are your bodys springs
plyometrics and sport specific training drills for ACL rehab

Its not only the structure of the tendon that is positively affected by strength training. The  mechanical properties of tendons that make them greater shock absorbers and almost have a spring like quality are affected by training as well.   Regular exercise, such as strength training , running, hopping  or physical activity, stimulates adaptive responses that enhances these spring like qualities.

How long does it take for tendon to get stronger ?

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Tendons have been regarded as slow responders to exercised as such they require a consistent and patient response over time. However it is more than likely that any tendon pain you have will improve at a far quicker rate than the actual change in the structure of the tendon.

Long-term changes, including collagen synthesis and remodelling, requires sustained training over an extended period. The amount of change is influenced by the following factors:

  • Intensity of the training, ( 70% of 1 rep max strength seems to be the magic number)
  • frequency, number of sessions done regularly
  • Duration of mechanical loading.
  • Type of training used.

It has been proposed that it takes up to 3 months in healthy tendon to see a change in the strength and quality of  the tendon.

Understanding these factors has important clinical implications. Rehabilitation and exercise programs can be designed to optimize tendon adaptation and enhance recovery from tendon injuries. Gradual progression of mechanical load, appropriate exercise selection, and load management are crucial to stimulate positive adaptations without overloading the tendon, which could lead to injury.

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Mechanical, Material and Morphological Adaptations of Healthy Lower Limb Tendons to Mechanical Loading: A Systematic Review and Meta-Analysis: Lazarczuk 2022