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Are you worried about rupturing your Achilles tendon? Then read this.

Updated: Dec 27, 2020

Yes, Achilles tendinopathy is a condition that can weaken you tendon and yes, if left unchecked it can lead to tendon rupture. BUT this rarely happens in runners or other athletes who train regularly. It is much more common in sedentary people who don’t often exercise and then suddenly take up exercise. Interestingly up to two thirds of these people also don’t have any of the “normal” symptoms (pain or stiffness) that we associate with tendinopathies before it happens. You can read more about this “silent” type of tendinopathy here.

Are you worried about rupturing your Achilles tendon? Then read this.

In this article:

  • Exercise strengthens your tendons

  • How likely are you to tear your tendon?

  • Factors that may create a greater risk up tendon rupture

  • In summary

Exercise strengthens your tendons

Tendons are mostly made up of collagen fibres. When you do exercise that work your Achilles tendon, it leads to increased collagen production. The fibres also become thicker and stronger.

If you rest your tendon for prolonged periods of time, it produces less collagen and the fibres lose some of their strength. This is why it’s so important that you do strength training exercises as part of your Achilles tendinopathy rehab.

How likely are you to tear your tendon?

No one can give you a definitive answer to this, but let me explain how we decide when our athletes who have Achilles tendinopathy are safe to go back to sport:

  1. We initially reduce the intensity of their training to a level that does not aggravate their tendon, through designing a programme that allows them relative rest. In my experience, this is usually a “safe” intensity and I’ve not had any patient tear an Achilles tendon while applying this principle.

  2. Then we make sure that we strengthen their tendons back up to the level that they need for their specific sport. When you run, forces of up to 6 times your bodyweight goes through your Achilles tendon and the strength training that you do, have to be enough to prepare your Achilles for this. We usually set our patients targets which are specific to them and the demands of their sport to gauge when they are ready to restart their sport.

  3. Lastly we reintroduce their sport slowly to allow their tendons to adapt to the new stimulus.

You can consult us online via video call for an assessment of your Achilles tendon and a tailored treatment plan. Follow the link to learn more.

Factors that may create a greater risk of tendon rupture

Fluoroquinolone antibiotics have been shown to carry a massive risk to tendon health. It can cause tendon weakness and rupture after a single dose and sometimes even up to 6 months after taking your last dose.

Corticosteroid use (either oral or injections) have also been reported to lead to an increased risk of Achilles rupture.

In summary

Don’t worry too much about tearing your Achilles tendon when you have a tendinopathy. As long as you take action to get it treated and strengthen it properly, you’re at very low risk of tearing it.

Let me know if you have any questions. Need more help with your Achilles? You’re welcome to consult us online via video call for an assessment of your Achilles injury and a tailored treatment plan.

Best wishes


About the Author:

Maryke Louw is a chartered physiotherapist and holds an MSc in Sports Injury Management. You can follow her on LinkedIn, Facebook, Twitter or Instagram.


  1. Webborn, A. (2007). "A neuropathic model to the etiology and management of Achilles tendinopathy."

  2. Cook, J. and S. Docking (2015). "“Rehabilitation will increase the ‘capacity’ of your …insert musculoskeletal tissue here….” Defining ‘tissue capacity’: a core concept for clinicians." British Journal of Sports Medicine 49(23): 1484-1485.