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Cross-training when you have Achilles tendonitis

Updated: May 29, 2023

Most active people fear getting an injury that prevents them from doing their usual training. With Achilles tendonitis, walking as well as running can be painful, and it’s difficult to figure out how to deal with this. This article explores the benefits of cross-training to maintain fitness while you recover from your Achilles injury.



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What happens to my body when I can’t train?


When we train, our body adapts to the activity we ask it to do. That’s why a weight lifter can lift increasingly heavier weights and a runner can run further or faster. We adapt to exercise through the supercompensation cycle (see picture below).


When we partake in sports like running (cardiovascular activity), we adapt by increasing our aerobic endurance (maintaining a high rate of oxygen uptake) and by improving our running economy (needing lower amounts of energy to move at a given speed).

These training adaptations are not permanent. Reducing or stopping the training load results in a reversal of the gains we’ve made. This is a two-way street – as soon as we start training again, the body adapts and once more we are able to do more.

This reversibility can happen in as little as 2-3 weeks, and it can cause a significant drop in strength or fitness by 8-10 weeks.


What is cross-training?

Cross-training refers to using other types of exercise to produce similar results to those of your normal sport/activity that you can’t do at the moment. When we are looking at specific conditions like an Achilles tendinopathy, we would also look for cross-training activities that don’t put so much load through your Achilles tendon that it triggers a pain response.

There is not much in the way of research that tells us what cross-training activity to pick for specific conditions, but examples of cardiovascular exercise that don’t load the Achilles tendon as much but would give the same adaptations as running are cycling and swimming.

Your Achilles tendon works like a spring, storing energy and then releasing it as we push off during jumping, hopping, or running. Cycling and swimming do not work/load your Achilles tendon in this way and therefor tend to be more comfortable.


Consult a physio online for an assessment of your Achilles injury and a tailored treatment plan. Follow the link to learn more.

How can cross-training help?


Cross-training needs to be used in a similar way to your current training. So, you should use a similar exercise intensity and frequency (how many times per week). It is important to phase in a new activity, as a sudden increase can cause problems. This cross-training activity should then maintain your cardiovascular fitness/strength while you can’t run, walk, or do your normal activity.


Remember to monitor your Achilles symptoms during this new activity and for 24 hours after, trying to keep these at a niggle or low level increase, if any. This means starting slowly and monitoring and building it up over time. It is important to gain professional advice on this.


Summary of useful hints for cross-training

  1. Choose an alternative exercise that mimics the same training adaptations for your cardiovascular system as the one that you can’t do.

  2. Train a similar number of times per week

  3. Train at a similar intensity

  4. Ease into this new activity to avoid further problems

  5. Monitor your Achilles tendon for its pain response.

How we can help


Need more help with your Achilles injury? You’re welcome to consult one of the team at TMA online via video call for an assessment of your injury and a tailored treatment plan.

Meet the TMA physios

We're all UK Chartered Physiotherapists with Master’s Degrees related to Sports & Exercise Medicine. But at Treat My Achilles we don't just value qualifications; all of us also have a wealth of experience working with athletes across a broad variety of sports, ranging from recreationally active people to professional athletes. You can meet the team here.

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About the Author:

Alison Gould is a chartered physiotherapist and holds an MSc in Sports and Exercise Medicine. You can follow her on LinkedIn, Facebook, Instagram or Twitter.




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