Foot and Ankle- Achilles Tendinopathy and Associated Conditions Flashcards
What is the prevalence of Achilles tendinopathy?
- MOST frequently reported overuse injury
What population is Achilles tendinopathy MOST common in?
- recreational/competitive activities
- training> competition
- 30-50 year olds
What percentage of runners end up with Achilles tendinopathy?
~10-20%
What are risk factors/etiologies for Achilles tendinopathy?
- Limited calf flexibility that may lead to tendinopathy origins
- calf weakness that may lead to overuse/ under supply
- biological males and family hx
- excessive EV/pronation
- Abnormal tendon structure / prior injury
- older age
- obesity
- systemic dz with persistent inflammation and poor blood supply
Why can excessive EV / pronation lead to Achilles tendinopathy?
- may lead to tendipathy origins due to achilles attaching more to medial portion of calcaneus
- Overuse may occur with impaired LQ control
What can impaired LQ control with excessive EV / pronation lead to?
- hip neuromuscular deficits
- balance deficits
What is excessive pronation?
- earlier, extended and/or excessive combination of DF, EV and abduction
How can pronation become excessive if hypermobility/instability is present?
More commonly:
- tibfib or talocrural hypermobility/instability
- impaired LQ control, top-down influence
Less commonly
- subtalar or medial knee hypermobility
How can pronation become excessive if adjacent joint hypomobility is present?
- limited talocrural DF may lead to midfoot and forefoot excessively EV and abd
- limited knee ext may lead to excessive ankle DF
- HIP WONT COMPENSATE, hip is IR when knee and talus both ER at heel/toe off
What can excessive pronation be associated with in the foot? leg and ankle? Knee and hip?
LQ conditions
- Foot: plantar fascitiis, tarsal tunnel, Morton’s, OA, hallux valgus
- Leg and ankle: Achilles tendinopathy, Sever’s, MTSS
- knee and hip: see prior notes
Why is older age a risk factor for Achilles tendinopathy?
more plastic, less elastic = more tension (tendinopathy origins)
What else should we consider when thinking about the etiology of Achilles tendinopathy?
- training errors
- environmental factors
- improper shoes
Why is obesity a risk factor for Achilles tendinopathy?
- OVERUSE, increased demand due to excess weight
What is an example of a systemic disease with persistent inflammation and poor blood supply that can contribute to Achilles tendinopathy?
- DIABETES
What structure is involved with Achilles tendinopathy?
Achilles tendon
What are the pathomechanics of Achilles tendinopathy?
- repetitive lengthening with compression from limited DF and/or excessive EV
- Collagen fibril thinning/disorganization and fibroblast death
- Thickened tendon
- Ineffective force transfer
- Impaired motor control
What can cause the non-collagen matrix to fill in with Achilles tendinopathy?
- altered fluid movement leads to overheating
- Increased nitric acid with persistent inflammation
CELLULAR CHANGES
What can cause the tendon to thicken yet weaken with Achilles tendinopathy?
- increase of non-collagen matrix
- fat deposition
What are some functional questionnaires for Achilles tendinopathy?
- Victorian Institute of Sport Assessment
- Foot and Ankle Ability Measure
- LEFS
What are symptoms of Achilles tendinopathy?
- Gradual onset that limits WBing activity
- Localized pain and stiffness
When does the localized pain and stiffness occur with Achilles tendinopathy?
- Particularly after inactivity
- Lessens with mild bout of activity
- Increase with moderate to severe activity
What are signs we will find in observation of Achilles tendinopathy?
- Achilles thickening
- possible impaired LQ control and/or excessive pronation
What will we find with ROM with Achilles tendinopathy?
- Possible pain and limitation with DF
What will we find with resisted/MMT with Achilles tendinopathy?
- possible pain with PF, may be weak
- possible hip and knee weakness