Kinematic Analysis of Runners with Achilles Mid-Portion Tendinopathy

Ryan, Michael P.; Grau, Stefan; Krauß, Inga; Maiwald, Christian; Taunton, Jack; Horstmann, Thomas

doi:10.3113/fai.2009.1190

Cited by 90 publications

(118 citation statements)

References 20 publications

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“…Consistent with our hypothesis, the AT group hopped in greater dorsiflexion at all recorded time points including; 4.3° at contact and 7.4° at peak. Our findings are consistent with those of Ryan, Grau, Krauss, Maiwald, Taunton, Horstmann 17 , who investigated ankle range of motion in patients with AT compared with healthy volunteers, finding that runners with AT had comparatively increased dorsiflexion range of motion. Whilst we observed an increase in dorsiflexion stretch amplitude, Ryan, Grau, Krauss, Maiwald, Taunton, Horstmann 17 found similar findings on observation of eversion stretch amplitude.…”

Section: Discussionsupporting

confidence: 82%

Achilles tendinopathy alters stretch shortening cycle behaviour during a sub-maximal hopping task

Debenham

Travers

Gibson

et al. 2016

Journal of Science and Medicine in Sport

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ObjectivesTo describe stretch shortening cycle behaviour of the ankle and lower limb in patients with Achilles tendinopathy (AT) and establish differences with healthy volunteers. DesignBetween-subjects case-controlled MethodsFifteen patients with AT (mean age 41.2 ± 12.7 years) and eleven healthy volunteers (CON) (mean age 23.2 ± 6.7 years) performed sub-maximal single-limb hopping on a custom built sledge-jump system. Using 3D motion analysis and surface EMG, temporal kinematic (lower limb stiffness, ankle angle at 80 ms pre-contact, ankle angle at contact, peak ankle angle, ankle stretch amplitude) and EMG measures (onset, offset and peak times relative to contact) were captured. Data between AT and CON were compared statistically using a linear mixed model. ResultsPatients with AT exhibited significantly increased lower limb stiffness when compared to healthy volunteers (p<0.001) and their hopping range was shifted towards a more dorsiflexed position (p<0.001). Furthermore, ankle stretch amplitude was greater in AT compared with healthy volunteers (p<.001). A delay in muscle activity was also observed; soleus onset (p<.001), tibialis anterior peak (p=0.026) and tibialis anterior offset (p<.001) were all delayed in AT compared with CON. ConclusionsThese findings indicate that patients with AT exhibit altered stretch-shortening cycle behaviour during sub-maximal hopping when compared with healthy volunteers. Patients with AT hop with greater lower limb stiffness, in a greater degree of ankle dorsiflexion and have a greater stretch amplitude.Likewise, delayed muscle activity is evident. These findings have implications in terms of informing the understanding of the pathoaetiology and management of AT.3

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Section: Discussionsupporting

confidence: 82%

Achilles tendinopathy alters stretch shortening cycle behaviour during a sub-maximal hopping task

Debenham

Travers

Gibson

et al. 2016

Journal of Science and Medicine in Sport

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“…However, excessive pronation (pes planus) is a chronic condition caused by insufficient support of the medial longitudinal arch (MLA) of the foot [3][4][5] . An excessively pronated foot is associated with several clinical pathologies of the lower extremity, including plantar fasciitis, tibialis posterior tendinitis, Achilles bursitis or tendinitis, and patellofemoral pain syndrome [6][7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

The Relationship between Activity of Abductor Hallucis and Navicular Drop in the One-leg Standing Position

Nam¹,

Kwon

2012

J Phys Ther Sci

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Abstract. [Purpose] This study examined whether abductor hallucis (AH) activity in the one-leg-standing position can be used to predict the navicular drop (ND) when it is or is not actively supporting the medial longitudinal arch.[Subjects] Forty healthy subjects without foot or ankle problems were recruited.[Methods] For all subjects, the ND was measured as the difference in navicular height between the subtalar joint resting (STJR) and subtalar joint neutral (STJN) positions while standing. AH activity was measured in both positions during one-leg standing.[Results] AH muscle activity in the STJR position was significantly negatively correlated with the ND, while AH muscle activity in the STJN position was not. Using a simple regression model, AH activity predicted the ND based on the STJR position.[Conclusion] The results suggest that AH activity is a good predictor of the ND. Therefore, intervention that activates the AH in the one-leg standing position could be used to correct the ND.

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“…Furthermore, we hypothesized that these differences would be most prominent in the transverse or frontal planes, because previous investigators have shown that group differences between controls and those with AT in automatic (trained) movements, such as running, were commonly evident in those planes. 11,27,31,38 …”

Section: Dancers With Achilles Tendinopathy Demonstrate Altered Lowermentioning

confidence: 99%

“…11,27,31 Excessive pronation of the subtalar joint is purported to be an etiological factor in the development of AT secondary to the resultant increased strain placed on the medial fibers of the Achilles tendon during stance (a "whipping" or "bowstring" effect). 7,27,31,32,38 McCrory et al 27 found that runners with AT demonstrated an overall increase in rearfoot motion during running stance, with more inversion at initial contact and increased pronation through midstance, which they theorized could further exaggerate the bowstring effect. It is important to note that in the dance literature excessive pronation is cited as a common inappropriate compensation to achieve the aesthetic requirement of maximal lower extremity external rotation (commonly referred to as "turnout"), particularly if the dancer is pushing beyond the constraints of his/her available hip range of motion.…”

Section: Frontal Plane Kinematicsmentioning

confidence: 99%

Dancers With Achilles Tendinopathy Demonstrate Altered Lower Extremity Takeoff Kinematics

Kulig

Loudon

Popovich

et al. 2011

J Orthop Sports Phys Ther

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Kinematic Analysis of Runners with Achilles Mid-Portion Tendinopathy

Cited by 90 publications

References 20 publications

Achilles tendinopathy alters stretch shortening cycle behaviour during a sub-maximal hopping task

Achilles tendinopathy alters stretch shortening cycle behaviour during a sub-maximal hopping task

The Relationship between Activity of Abductor Hallucis and Navicular Drop in the One-leg Standing Position

Dancers With Achilles Tendinopathy Demonstrate Altered Lower Extremity Takeoff Kinematics

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