What you need to know about Tibialis Posterior Injuries
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Have you been noticing that your foot has become more flat? Do you have pain behind the inner bone on your ankle or pain on the arch of your foot? If you do, you may have a problem with your tibialis posterior.
The Tibialis posterior is a muscle that runs down the inside of your leg behind your ankle bone (medial malleolus) and attaches to a bone on your midfoot/arch called the navicular. The tibialis posterior is an important muscle for inverting (turning in) your foot, plantar flexing your foot (pointing your toes down), but mainly it is the most important muscle for supporting the medial longitudinal arch of your foot.
There are a number of different conditions which can be a result of an injury to the tibialis posterior:
Firstly one may experience a tibialis posterior tendinopathy. This tendinopathy usually occurs as a result of overusing your tibialis posterior tendon. This overuse may be a result of increasing ankle/foot activity such as increased running, increased calf and ankle strength training or introducing an activity that your ankle and foot are not used to performing at a high rate (such as a jumping sport 4 times a week). This injury will start as a slight pain and as you keep loading or exercising the affected tendon, pain will increase over time.
Another condition that can be affected by an injured tibialis posterior is posterior tibial tendon dysfunction (PTTD). PTTD is the most common cause of adult acquired flat foot (Bubra et al, 2015). PTTD can be a result of tibialis posterior tendinosis where by repetitive microtrama of the affected tendon leads to degeneration which is then replaced with ineffective fibrotic tissue (Mosie et al, 1998) also, it can be caused by an acute/traumatic rupture of the tib posterior tendon which occurs through ankle fractures or direct trauma to the tendon itself.
Although we have gone into detail about these two conditions, there are other conditions such as tibialis posterior tendon rupture as well as tibialis posterior muscle strain which can occur. If you are finding that you are having pain around the inner ankle bone, on the foot arch with movement or when you press around this area - you may be experiencing a tibialis posterior injury.
If this pain is causing you problems your day to day life or is affecting you when you are exercising, head in to see us and well will provide a comprehensive assessment on the foot and provide a pain relief/exercise program aiming to get rid of that pan as well as strengthen the tendon and ankle as a whole.
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