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Klein M, Patterson C, Karim A, Cuddeford T. Running biomechanical and isokinetic strength differences in masters runners with and without Achilles tendinopathy. Sports Biomech 2024:1-14. [PMID: 38949234 DOI: 10.1080/14763141.2024.2373376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 06/14/2024] [Indexed: 07/02/2024]
Abstract
Masters runners are an increasing proportion of the running community. The most significant musculoskeletal changes in runners occur after the age of 50 in addition to changes in injury rates and types, the most common being Achilles tendinopathy (AT). Previous evidence has suggested similarities between risk factors for AT and age-related changes that are focused at the hip and the ankle during the propulsive stage of running. The purpose of this study was to investigate biomechanical and peak torque association to AT in masters runners. Thirty-two masters runners over age 50 with AT (60.31 ± 8.37, n = 16) and without (59.94 ± 4.95 n = 16) were included. 3D motion capture and force plates were used to assess running biomechanics. A motor-driven dynamometer was used to assess isokinetic peak torque production. No significant differences in running biomechanics were found between masters runners with and without AT. Hip peak isokinetic torque production was found to be significantly less in masters runners with AT, but no significant differences in ankle plantarflexion peak isokinetic torque production were found. Masters runners with AT may be able to adapt their running biomechanics and muscular torque production during submaximal running efforts.
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Affiliation(s)
- Matthew Klein
- Department of Physical Therapy, Azusa Pacific University, Azusa, CA, USA
- Department of Rehabilitation and Movement Science, Azusa Pacific University, Azusa, CA, USA
- Department of Physical Therapy, West Coast University Center for Graduate Studies, Los Angeles, CA, USA
| | - Chris Patterson
- Department of Rehabilitation and Movement Science, Azusa Pacific University, Azusa, CA, USA
- Department of Physical Therapy, West Coast University Center for Graduate Studies, Los Angeles, CA, USA
| | - Annette Karim
- Department of Rehabilitation and Movement Science, Azusa Pacific University, Azusa, CA, USA
- Department of Physical Therapy, West Coast University Center for Graduate Studies, Los Angeles, CA, USA
| | - Tyler Cuddeford
- Department of Physical Therapy, George Fox University, Newberg, OR, USA
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Aubol KG, Milner CE. Whipping or tearing? The biomechanics of Achilles tendinopathy in rearfoot strike runners. Foot (Edinb) 2024; 59:102082. [PMID: 38574632 DOI: 10.1016/j.foot.2024.102082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 02/19/2024] [Accepted: 03/08/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND Two biomechanical mechanisms for the development of Achilles tendinopathy in runners have been proposed: A whipping mechanism characterized by prolonged and excessive rearfoot eversion, and a tearing mechanism characterized by high eccentric plantar flexor forces. The purpose of this pilot study was to determine if runners with and without a history of Achilles tendinopathy exhibited gait biomechanics consistent with either of these mechanisms. METHODS Seven male runners with previous or current Achilles tendinopathy and seven healthy male control runners were evaluated by three-dimensional gait analysis. Peak rearfoot eversion angle, rearfoot eversion excursion, duration of rearfoot eversion, and peak rearfoot inversion angle were compared between groups to evaluate the whipping mechanism of injury. Peak dorsiflexion angle, peak dorsiflexion velocity, and peak ankle power absorption were compared between groups to evaluate the tearing mechanism. Additionally, rearfoot eversion angle and sagittal plane ankle power waveforms were compared between groups using statistical parametric mapping. FINDINGS There were no differences in any rearfoot eversion, inversion, or dorsiflexion variables or waveforms during running in the Achilles tendinopathy group compared to controls. INTERPRETATION Rearfoot strike runners with Achilles tendinopathy do not exhibit running biomechanics consistent with either the whipping or tearing mechanisms of injury.
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Affiliation(s)
- Kevin G Aubol
- Department of Physical Therapy & Rehabilitation Sciences, Drexel University, USA.
| | - Clare E Milner
- Department of Physical Therapy & Rehabilitation Sciences, Drexel University, USA
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Joachim MR, Kliethermes SA, Heiderscheit BC. Preinjury Knee and Ankle Mechanics during Running Are Reduced among Collegiate Runners Who Develop Achilles Tendinopathy. Med Sci Sports Exerc 2024; 56:128-133. [PMID: 37703042 DOI: 10.1249/mss.0000000000003276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
INTRODUCTION Achilles tendinopathies (AT) are common in runners, but prospective data assessing running mechanics associated with developing AT are limited. Asymmetry in running mechanics is also considered a risk factor for injury, although it is unknown if the problematic mechanics occur on the injured limb only or are present bilaterally. PURPOSE This study aimed to prospectively identify differences in preinjury running biomechanics in collegiate runners who did and did not develop AT and determine if between-limb asymmetries were associated with which limb developed AT. METHODS Running gait data were obtained preseason on healthy collegiate cross-country runners, and AT incidence was prospectively recorded each year. Spatiotemporal, ground reaction forces, and joint kinematics and kinetics were analyzed. Linear mixed-effects models assessed differences in biomechanics between those who did and did not develop AT during the subsequent year. Generalized linear mixed-effects models determined if the asymmetry direction was associated with which limb developed an AT, with odds ratios (OR) and 95% confidence intervals (95% CI) reported. RESULTS Data from 106 runners were analyzed and 15 developed AT. Preinjury biomechanics of runners who developed AT showed less peak knee flexion (noninjured: 45.9° (45.2°-46.6°), injured: 43.2° (41.5°-44.9°), P < 0.001), ankle dorsiflexion (noninjured: 28.7° (28.0°-30.2°), injured: 26.0° (23.8°-28.3°), P = 0.01), and knee extensor moment (noninjured: -2.18 (N·m)·kg -1 (-2.24 to -2.12 (N·m)·kg -1 ), injured: -2.00 (N·m)·kg -1 (-2.17 to -1.84 (N·m)·kg -1 ), P = 0.02). The limb demonstrating less peak knee flexion had greater odds of sustaining an AT (OR, 1.29 (1.00-1.65), P = 0.05). CONCLUSIONS Knee and ankle kinematics, in addition to knee kinetics, were associated with developing an AT. Monitoring these mechanics may be useful for prospectively identifying runners at risk of developing AT.
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McNally T, Edwards S, Halaki M, O'Dwyer N, Pizzari T, Blyton S. Quantifying demands on the hamstrings during high-speed running: A systematic review and meta-analysis. Scand J Med Sci Sports 2023; 33:2423-2443. [PMID: 37668346 DOI: 10.1111/sms.14478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 07/24/2023] [Accepted: 08/16/2023] [Indexed: 09/06/2023]
Abstract
INTRODUCTION Hamstring strain injury (HSI) remains a performance, economic, and player availability burden in sport. High-speed running (HSR) is cited as a common mechanism for HSI. While evidence exists regarding the high physical demands on the hamstring muscles in HSR, meta-analytical synthesis of related activation and kinetic variables is lacking. METHODS A systematic search of Medline, Embase, Scopus, CINAHL, SportDiscus, and Cochrane library databases was conducted in accordance with the PRISMA 2020 guidelines. Studies reporting hamstring activation (electromyographic [EMG]) or hamstring muscle/related joint kinetics were included where healthy adult participants ran at or beyond 60% of maximum speed (activation studies) or 4 m per second (m/s) (kinetic studies). RESULTS A total of 96 studies met the inclusion criteria. Run intensities were categorized as "slow," "moderate," or "fast" in both activation and kinetic based studies with appropriate relative, and raw measures, respectively. Meta-analysis revealed pooled mean lateral hamstring muscle activation levels of 108.1% (95% CI: 84.4%-131.7%) of maximal voluntary isometric contraction (MVIC) during "fast" running. Meta-analysis found swing phase peak knee flexion internal moment and power at 2.2 Newton meters/kilogram (Nm/kg) (95% CI: 1.9-2.5) and 40.3 Watts/kilogram (W/kg) (95% CI: 31.4-49.2), respectively. Hip extension peak moment and power was estimated as 4.8 Nm/kg (95% CI: 3.9-5.7) and 33.1 W/kg (95% CI: 17.4-48.9), respectively. CONCLUSIONS As run intensity/speed increases, so do the activation and kinetic demands on the hamstrings. The presented data will enable clinicians to incorporate more objective measures into the design of injury prevention and return-to-play decision-making strategies.
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Affiliation(s)
- Timothy McNally
- Faculty of Medicine & Health, Sydney School of Health Sciences, Discipline of Exercise & Sport Science, Sydney, New South Wales, Australia
| | - Suzi Edwards
- Faculty of Medicine & Health, Sydney School of Health Sciences, Discipline of Exercise & Sport Science, Sydney, New South Wales, Australia
| | - Mark Halaki
- Faculty of Medicine & Health, Sydney School of Health Sciences, Discipline of Exercise & Sport Science, Sydney, New South Wales, Australia
| | - Nicholas O'Dwyer
- Faculty of Medicine & Health, Sydney School of Health Sciences, Discipline of Exercise & Sport Science, Sydney, New South Wales, Australia
| | - Tania Pizzari
- School of Allied Health, La Trobe University, Melbourne, Victoria, Australia
| | - Sarah Blyton
- School of Health Sciences (Physiotherapy), University of Newcastle, Newcastle, New South Wales, Australia
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Dewald M, Dalland J, Stockland J. The Association of Joint Power Kinetic Variables with Running Injuries: A Case-Control Study. Int J Sports Phys Ther 2023; 18:864-873. [PMID: 37547840 PMCID: PMC10399108 DOI: 10.26603/001c.83216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 05/16/2023] [Indexed: 08/08/2023] Open
Abstract
Background There is conflicting data on which kinetic variables are important to consider with running injuries. Furthermore, less is understood regarding differences in these variables when considering demographics such as age, sex, weight, and running speed. The primary question was what joint power kinetic variables were different between non-injured and injured runners. Purpose The purpose of this study was to identify if there were differences in joint power kinetic variables between non-injured runners and injured runners. Study Design Case-Control Study. Methods Kinetic data were collected on 122 runners (26 non-injured and 96 injured) over three years with a Bertec force plated treadmill and Qualisys 3D motion capture. The subjects were considered eligible if they self-identified themselves as runners or had running as a key component of their activity. The subjects ran at a comfortable, self-selected pace while two 10-second trials of recordings were used to calculate the means of peak power generated at the hips, knees, and ankles of each gait cycle. Foot strike was categorized by kinematic data. Two sample T-tests were used to compare peak power variables at the hips, knees, and ankles between non-injured and injured runners. Logistic regression analyses examined how a combination of demographics and peak power variables were associated with injuries. Results No peak power variable at the hip, knee, or ankle was significantly different between injured and non-injured runners (p=0.07-0.87). However, higher hip power absorbed was found to be protective against injuries (odds ratio, .16; 95% CI .025-.88) when considering demographics using a logistic regression model including sex, foot strike, BMI, speed, age, and power variables from the hip, knee, and ankle. The area under the ROC curve was .74, which is acceptable discrimination. Conclusion When controlling for age, sex, BMI, foot strike, and speed; higher hip power absorbed was found to be protective against injury. This could be due to the hip muscles' unique role in absorbing force during early stance phase. Level of Evidence 3b©The Author(s).
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Skypala J, Hamill J, Sebera M, Elavsky S, Monte A, Jandacka D. Running-Related Achilles Tendon Injury: A Prospective Biomechanical Study in Recreational Runners. J Appl Biomech 2023:1-9. [PMID: 37419494 DOI: 10.1123/jab.2022-0221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 04/17/2023] [Accepted: 05/09/2023] [Indexed: 07/09/2023]
Abstract
There are relatively few running studies that have attempted to prospectively identify biomechanical risk factors associated with Achilles tendon (AT) injuries. Therefore, the aim was to prospectively determine potential running biomechanical risk factors associated with the development of AT injuries in recreational, healthy runners. At study entry, 108 participants completed a set of questionnaires. They underwent an analysis of their running biomechanics at self-selected running speed. The incidence of AT running-related injuries (RRI) was assessed after 1-year using a weekly questionnaire standardized for RRI. Potential biomechanical risk factors for the development of AT RRI injury were identified using multivariable logistic regression. Of the 103 participants, 25% of the sample (15 males and 11 females) reported an AT RRI on the right lower limb during the 1-year evaluation period. A more flexed knee at initial contact (odds ratio = 1.146, P = .034) and at the midstance phase (odds ratio = 1.143, P = .037) were significant predictors for developing AT RRI. The results suggested that a 1-degree increase in knee flexion at initial contact and midstance was associated with a 15% increase in the risk of an AT RRI, thus causing a limitation of training or a stoppage of running in runners.
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Affiliation(s)
- Jiri Skypala
- Department of Human Movement Studies, Human Motion Diagnostic Center, University of Ostrava, Ostrava,Czech Republic
| | - Joseph Hamill
- Department of Human Movement Studies, Human Motion Diagnostic Center, University of Ostrava, Ostrava,Czech Republic
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA,USA
| | - Michal Sebera
- Department of Human Movement Studies, Human Motion Diagnostic Center, University of Ostrava, Ostrava,Czech Republic
| | - Steriani Elavsky
- Department of Human Movement Studies, Human Motion Diagnostic Center, University of Ostrava, Ostrava,Czech Republic
| | - Andrea Monte
- Department of Human Movement Studies, Human Motion Diagnostic Center, University of Ostrava, Ostrava,Czech Republic
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona,Italy
| | - Daniel Jandacka
- Department of Human Movement Studies, Human Motion Diagnostic Center, University of Ostrava, Ostrava,Czech Republic
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Quarmby A, Mönnig J, Mugele H, Henschke J, Kim M, Cassel M, Engel T. Biomechanics and lower limb function are altered in athletes and runners with achilles tendinopathy compared with healthy controls: A systematic review. Front Sports Act Living 2023; 4:1012471. [PMID: 36685067 PMCID: PMC9845578 DOI: 10.3389/fspor.2022.1012471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 11/30/2022] [Indexed: 01/06/2023] Open
Abstract
Achilles tendinopathy (AT) is a debilitating injury in athletes, especially for those engaged in repetitive stretch-shortening cycle activities. Clinical risk factors are numerous, but it has been suggested that altered biomechanics might be associated with AT. No systematic review has been conducted investigating these biomechanical alterations in specifically athletic populations. Therefore, the aim of this systematic review was to compare the lower-limb biomechanics of athletes with AT to athletically matched asymptomatic controls. Databases were searched for relevant studies investigating biomechanics during gait activities and other motor tasks such as hopping, isolated strength tasks, and reflex responses. Inclusion criteria for studies were an AT diagnosis in at least one group, cross-sectional or prospective data, at least one outcome comparing biomechanical data between an AT and healthy group, and athletic populations. Studies were excluded if patients had Achilles tendon rupture/surgery, participants reported injuries other than AT, and when only within-subject data was available.. Effect sizes (Cohen's d) with 95% confidence intervals were calculated for relevant outcomes. The initial search yielded 4,442 studies. After screening, twenty studies (775 total participants) were synthesised, reporting on a wide range of biomechanical outcomes. Females were under-represented and patients in the AT group were three years older on average. Biomechanical alterations were identified in some studies during running, hopping, jumping, strength tasks and reflex activity. Equally, several biomechanical variables studied were not associated with AT in included studies, indicating a conflicting picture. Kinematics in AT patients appeared to be altered in the lower limb, potentially indicating a pattern of "medial collapse". Muscular activity of the calf and hips was different between groups, whereby AT patients exhibited greater calf electromyographic amplitudes despite lower plantar flexor strength. Overall, dynamic maximal strength of the plantar flexors, and isometric strength of the hips might be reduced in the AT group. This systematic review reports on several biomechanical alterations in athletes with AT. With further research, these factors could potentially form treatment targets for clinicians, although clinical approaches should take other contributing health factors into account. The studies included were of low quality, and currently no solid conclusions can be drawn.
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Affiliation(s)
- Andrew Quarmby
- University Outpatient Clinic, Sports Medicine & Sports Orthopaedics, University of Potsdam, Potsdam, Germany,Correspondence: Andrew Quarmby
| | - Jamal Mönnig
- University Outpatient Clinic, Sports Medicine & Sports Orthopaedics, University of Potsdam, Potsdam, Germany
| | - Hendrik Mugele
- Department of Sport Science, Laboratory for Environmental and Exercise Science, University of Innsbruck, Innsbruck, Austria
| | - Jakob Henschke
- University Outpatient Clinic, Sports Medicine & Sports Orthopaedics, University of Potsdam, Potsdam, Germany
| | - MyoungHwee Kim
- University Outpatient Clinic, Sports Medicine & Sports Orthopaedics, University of Potsdam, Potsdam, Germany
| | - Michael Cassel
- University Outpatient Clinic, Sports Medicine & Sports Orthopaedics, University of Potsdam, Potsdam, Germany
| | - Tilman Engel
- University Outpatient Clinic, Sports Medicine & Sports Orthopaedics, University of Potsdam, Potsdam, Germany
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Urbaczka J, Silvernail JF, Jandacka D. The effect of fatigue on the ankle and knee kinematics and kinetics in moderately and highly trained healthy non-rearfoot runners. Sports Biomech 2022:1-15. [PMID: 36453095 DOI: 10.1080/14763141.2022.2146909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 11/07/2022] [Indexed: 12/05/2022]
Abstract
The aim of this study was to compare selected ankle and knee kinematic and kinetic parameters before and a fter a prolonged exhaustive treadmill run between two groups of non-rearfoot footstrike pattern (NRFP) runners with different training volumes. Twenty-eight habitual NRFP runners were assigned to two groups based on their weekly training volume (Highly-trained (HT)/Moderately-trained (MT)). Participants underwent the VO2max test, and the exhaustive treadmill ran with biomechanical analysis at the beginning and the end. The two-way RMANOVA was used to assess differences between the groups and the phase of the run. A paired t-test was used for post-hoc analysis in case of significant interaction effect. Kinetic results showed significant group effect for ankle plantarflexion moment and hip external rotation moment (end-phase: both greater in MT group). Kinematic results showed significant group×phase interaction for ankle dorsiflexion angle (end-phase: greater in MT group) at initial contact (IC), peak knee flexion angle (end-phase: greater in MT group), and peak ankle eversion angle during the stance phase (end-phase: greater in HT group). Additionally, a group effect was found for knee flexion angle at IC (end-phase: greater in HT group). This study suggests that HT healthy NRFP runners may have less potential for increased biomechanical risk of AT overload during an exhaustive run.
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Affiliation(s)
- J Urbaczka
- Department of Human Movement Studies, University of Ostrava, Ostrava, Czech Republic
| | - J F Silvernail
- Department of Kinesiology and Nutrition Sciences, University of Nevada, Las Vegas, USA
| | - D Jandacka
- Department of Human Movement Studies, University of Ostrava, Ostrava, Czech Republic
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Willwacher S, Kurz M, Robbin J, Thelen M, Hamill J, Kelly L, Mai P. Running-Related Biomechanical Risk Factors for Overuse Injuries in Distance Runners: A Systematic Review Considering Injury Specificity and the Potentials for Future Research. Sports Med 2022; 52:1863-1877. [PMID: 35247202 PMCID: PMC9325808 DOI: 10.1007/s40279-022-01666-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/15/2022] [Indexed: 01/25/2023]
Abstract
BACKGROUND Running overuse injuries (ROIs) occur within a complex, partly injury-specific interplay between training loads and extrinsic and intrinsic risk factors. Biomechanical risk factors (BRFs) are related to the individual running style. While BRFs have been reviewed regarding general ROI risk, no systematic review has addressed BRFs for specific ROIs using a standardized methodology. OBJECTIVE To identify and evaluate the evidence for the most relevant BRFs for ROIs determined during running and to suggest future research directions. DESIGN Systematic review considering prospective and retrospective studies. (PROSPERO_ID: 236,832). DATA SOURCES PubMed. Connected Papers. The search was performed in February 2021. ELIGIBILITY CRITERIA English language. Studies on participants whose primary sport is running addressing the risk for the seven most common ROIs and at least one kinematic, kinetic (including pressure measurements), or electromyographic BRF. A BRF needed to be identified in at least one prospective or two independent retrospective studies. BRFs needed to be determined during running. RESULTS Sixty-six articles fulfilled our eligibility criteria. Levels of evidence for specific ROIs ranged from conflicting to moderate evidence. Running populations and methods applied varied considerably between studies. While some BRFs appeared for several ROIs, most BRFs were specific for a particular ROI. Most BRFs derived from lower-extremity joint kinematics and kinetics were located in the frontal and transverse planes of motion. Further, plantar pressure, vertical ground reaction force loading rate and free moment-related parameters were identified as kinetic BRFs. CONCLUSION This study offers a comprehensive overview of BRFs for the most common ROIs, which might serve as a starting point to develop ROI-specific risk profiles of individual runners. We identified limited evidence for most ROI-specific risk factors, highlighting the need for performing further high-quality studies in the future. However, consensus on data collection standards (including the quantification of workload and stress tolerance variables and the reporting of injuries) is warranted.
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Affiliation(s)
- Steffen Willwacher
- grid.440974.a0000 0001 2234 6983Department for Mechanical and Process Engineering, Offenburg University of Applied Sciences, Offenburg, Germany ,grid.27593.3a0000 0001 2244 5164Institute for Biomechanics and Orthopaedics, German Sport University Cologne, Cologne, Germany
| | - Markus Kurz
- grid.29050.3e0000 0001 1530 0805Department of Quality Technology & Mechanical Engineering, Mid Sweden University, Östersund, Sweden
| | - Johanna Robbin
- grid.440974.a0000 0001 2234 6983Department for Mechanical and Process Engineering, Offenburg University of Applied Sciences, Offenburg, Germany ,grid.27593.3a0000 0001 2244 5164Institute for Biomechanics and Orthopaedics, German Sport University Cologne, Cologne, Germany
| | - Matthias Thelen
- grid.27593.3a0000 0001 2244 5164Institute for Biomechanics and Orthopaedics, German Sport University Cologne, Cologne, Germany
| | - Joseph Hamill
- grid.266683.f0000 0001 2166 5835Biomechanics Laboratory, University of Massachusetts, Amherst, MA USA
| | - Luke Kelly
- grid.1003.20000 0000 9320 7537School of Human Movement and Nutrition Sciences, University of Queensland, St. Lucia, QLD Australia
| | - Patrick Mai
- grid.440974.a0000 0001 2234 6983Department for Mechanical and Process Engineering, Offenburg University of Applied Sciences, Offenburg, Germany ,grid.27593.3a0000 0001 2244 5164Institute for Biomechanics and Orthopaedics, German Sport University Cologne, Cologne, Germany
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Zainuddin FL, Abd Rahman NA, Razman R, Shaharudin S. Lower limb biomechanical factors associated with Achilles tendinopathy in runners: a systematic review. SPORT SCIENCES FOR HEALTH 2021. [DOI: 10.1007/s11332-021-00862-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Matthews W, Ellis R, Furness J, Hing WA. The clinical diagnosis of Achilles tendinopathy: a scoping review. PeerJ 2021; 9:e12166. [PMID: 34692248 PMCID: PMC8485842 DOI: 10.7717/peerj.12166] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 08/25/2021] [Indexed: 12/13/2022] Open
Abstract
Background Achilles tendinopathy describes the clinical presentation of pain localised to the Achilles tendon and associated loss of function with tendon loading activities. However, clinicians display differing approaches to the diagnosis of Achilles tendinopathy due to inconsistency in the clinical terminology, an evolving understanding of the pathophysiology, and the lack of consensus on clinical tests which could be considered the gold standard for diagnosing Achilles tendinopathy. The primary aim of this scoping review is to provide a method for clinically diagnosing Achilles tendinopathy that aligns with the nine core health domains. Methodology A scoping review was conducted to synthesise available evidence on the clinical diagnosis and clinical outcome measures of Achilles tendinopathy. Extracted data included author, year of publication, participant characteristics, methods for diagnosing Achilles tendinopathy and outcome measures. Results A total of 159 articles were included in this scoping review. The most commonly used subjective measure was self-reported location of pain, while additional measures included pain with tendon loading activity, duration of symptoms and tendon stiffness. The most commonly identified objective clinical test for Achilles tendinopathy was tendon palpation (including pain on palpation, localised tendon thickening or localised swelling). Further objective tests used to assess Achilles tendinopathy included tendon pain during loading activities (single-leg heel raises and hopping) and the Royal London Hospital Test and the Painful Arc Sign. The VISA-A questionnaire as the most commonly used outcome measure to monitor Achilles tendinopathy. However, psychological factors (PES, TKS and PCS) and overall quality of life (SF-12, SF-36 and EQ-5D-5L) were less frequently measured. Conclusions There is significant variation in the methodology and outcome measures used to diagnose Achilles tendinopathy. A method for diagnosing Achilles tendinopathy is proposed, that includes both results from the scoping review and recent recommendations for reporting results in tendinopathy.
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Affiliation(s)
- Wesley Matthews
- Bond Institute of Health and Sport, Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Queensland, Australia
| | - Richard Ellis
- Active Living and Rehabilitation: Aotearoa New Zealand, Health and Rehabilitation Research Institute, Faculty of Health and Environmental Sciences, Auckland University of Technology, Auckland, New Zealand.,Department of Physiotherapy, School of Clinical Sciences, Faculty of Health and Environmental Sciences, Auckland University of Technology, Auckland, New Zealand
| | - James Furness
- Bond Institute of Health and Sport, Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Queensland, Australia
| | - Wayne A Hing
- Bond Institute of Health and Sport, Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Queensland, Australia
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Hannigan JJ, Pollard CD. Biomechanical analysis of two runners who developed leg injuries during a six-week transition to maximal running shoes: A case series. J Sports Sci 2021; 39:2305-2311. [PMID: 34074228 DOI: 10.1080/02640414.2021.1930683] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Achilles tendinopathy (AT) and medial tibial stress syndrome (MTSS) are two of the most common running-related injuries. In a previous study investigating running biomechanics before and after a six-week transition to maximal running shoes, two runners dropped out of this study due to Achilles pain and shin pain, respectively. The purpose of this case series was to investigate running biomechanics in those two runners, identifying potential causes for injury in relation to maximal shoe use. Running biomechanics were collected in a laboratory setting for these two runners wearing both a maximal running shoe and traditional running shoe before the six-week transition using an 8-camera motion capture system and two embedded force plates. Both runners displayed prolonged eversion in the maximal shoe, which has been previously cited as a potential risk factor for developing Achilles tendinopathy and medial tibial stress syndrome. Relatively high loading rates and impact forces were also observed in the runner with shin pain in the maximal shoe, which may have contributed to their pain. More prospective research on injury rates in individuals running in maximal shoes is needed.
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Affiliation(s)
- J J Hannigan
- Program in Physical Therapy, Oregon State University - Cascades, Bend, OR, USA.,School of Biological and Population Health Sciences, Oregon State University, Corvallis, OR, USA
| | - Christine D Pollard
- Program in Physical Therapy, Oregon State University - Cascades, Bend, OR, USA.,School of Biological and Population Health Sciences, Oregon State University, Corvallis, OR, USA
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Ferreira VMLM, Oliveira RR, Nazareno TS, Freitas LV, Mendonça LD. Interaction of foot and hip factors identifies Achilles tendinopathy occurrence in recreational runners. Phys Ther Sport 2020; 45:111-119. [PMID: 32763839 DOI: 10.1016/j.ptsp.2020.06.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 06/08/2020] [Accepted: 06/09/2020] [Indexed: 12/27/2022]
Abstract
OBJECTIVES To investigate the interaction of ankle-foot complex and hip joint factors with Achilles Tendinopathy (AT) occurrence in recreational runners. DESIGN Cross-sectional. SETTING Research Laboratory. PARTICIPANTS 51 runners, 26 healthy and 25 with AT. MAIN OUTCOMES MEASURES Shank-forefoot alignment (SFA), weight bearing lunge test (WBLT), passive hip internal rotation (IR) range of motion (ROM), hip external rotators (ER) and ankle plantar flexors (PF) isometric strength. CART analyses were performed to assess interactions that could distinguish those with AT. RESULTS Passive hip IR ROM, ankle PF torque, SFA, and hip ER isometric torque were associated AT occurrence. The model correctly classified 92% of individuals without AT and 72% of those with AT. The area under the receiver operating characteristic curve was 0.88. Interaction factors revealed in nodes 3 and 10 were statistically significant. In node 3, runners with more than 29.33° of passive hip IR ROM had a 130% increased likelihood (PR = 2.30) of AT. Node 10 showed that individuals with higher PF torque, SFA varus, ER torque, but reduced passive hip IR ROM had an 87% increased likelihood (PR = 1.87) of AT. CONCLUSION Interactions between hip and foot factors could accurately classify recreational runners with and without AT.
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Affiliation(s)
- Victor M L M Ferreira
- Postgraduate Program in Rehabilitation and Functional Performance -Universidade Federal dos Vales do Jetiquinhonha e Mucuri, Rodovia MGT 367, Km 583, 5000 Alto da Jacuba, 39100-000, Diamantina, Minas Gerais, Brazil.
| | - Rodrigo R Oliveira
- Physical Therapy Department - Universidade Federal do Ceará, Rua Major Weyne, 1440, Rodolfo Teófilo, 60430-160, Fortaleza, Ceará, Brazil.
| | - Thamiris S Nazareno
- Physical Therapy Department - Universidade Federal do Ceará, Rua Major Weyne, 1440, Rodolfo Teófilo, 60430-160, Fortaleza, Ceará, Brazil.
| | - Lucas V Freitas
- Physical Therapy Department - Universidade Federal do Ceará, Rua Major Weyne, 1440, Rodolfo Teófilo, 60430-160, Fortaleza, Ceará, Brazil.
| | - Luciana D Mendonça
- Postgraduate Program in Rehabilitation and Functional Performance -Universidade Federal dos Vales do Jetiquinhonha e Mucuri, Rodovia MGT 367, Km 583, 5000 Alto da Jacuba, 39100-000, Diamantina, Minas Gerais, Brazil; Physical Therapy Department, School of Biological and Health Sciences, Universidade Federal dos Vales do Jetiquinhonha e Mucuri, Rodovia MGT 367, Km 584, 5000 Alto da Jacuba, 39100-000, Diamantina, Minhas Gerais, Brazil.
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Sancho I, Malliaras P, Barton C, Willy RW, Morrissey D. Biomechanical alterations in individuals with Achilles tendinopathy during running and hopping: A systematic review with meta-analysis. Gait Posture 2019; 73:189-201. [PMID: 31351358 DOI: 10.1016/j.gaitpost.2019.07.121] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 06/19/2019] [Accepted: 07/01/2019] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Biomechanical alterations during running and hopping in people with Achilles tendinopathy (AT) may provide treatment and prevention targets. This review identifies and synthesises research evaluating biomechanical alterations among people with AT during running, jumping and hopping. METHOD MEDLINE, EMBASE, CiNAHL and SPORTDiscus were searched in July 2018 for case control, cross-sectional and prospective studies investigating kinematics, kinetics, plantar pressures and neuromuscular activity in AT participants during running or hopping. Study quality was assessed with a modified version of the Downs and Black quality checklist, and evidence grading applied. RESULTS 16 studies reported 249 outcomes, of which 17% differed between groups. Reduced peroneus longus (standardized mean difference [95%CI]; -0.53 [-0.98, -0.09]) and medial gastrocnemius (-0.60 [-1.05, -0.15]) amplitude in AT runners versus control was found (limited evidence). Increased hip adduction impulse 1.62 [0.69, 2.54], hip peak external rotation moment (1.55 [0.63, 2.46] and hip external rotation impulse (1.45 [0.55, 2.35]) was found in AT runners versus control (limited evidence). Reduced anterior (-0.94 [-1.64, -0.24] and greater lateral (-0.92 [-1.61, -0.22]) displacement of plantar pressure preceded AT in runners (limited evidence). Delayed onsets of gluteus medius (1.95 [1.07, 2.83] and gluteus maximus (1.26 [0.48, 2.05] and shorter duration of gluteus maximus activation (-1.41 [-2.22, -0.61] was found during shod running in the AT group versus control (limited evidence). Earlier offset time of gluteus maximus (-1.03 [-1.79, -0.27] and shorter duration of activation of gluteus medius (-0.18 [-0.24, -0.12] during running in AT runners versus control was found (limited evidence). Reduced leg stiffness was found in the affected side during submaximal hopping (-0.39 [-0.79, -0.00]) (limited evidence). CONCLUSION This review identified potential biomechanical treatment targets in people with AT. The efficacy of treatments targeting these biomechanics should be assessed. SYSTEMATIC REVIEW REGISTRY PROSPERO registration number: CRD42016048636.
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Affiliation(s)
- Igor Sancho
- Sports and Exercise Medicine. Queen Mary University of London, United Kingdom.
| | | | - Christian Barton
- La Trobe Sport and Exercise Medicine Research Centre, College of Science, Health and Engineering, Australia; Department of Surgery, St Vincent's Hospital, University of Melbourne, Australia.
| | - Richard W Willy
- School of Physical Therapy and Rehabilitation Sciences, University of Montana, Missoula, Montana, United States.
| | - Dylan Morrissey
- Sports and Exercise Medicine. Queen Mary University of London, United Kingdom; Physiotherapy Department, Barts Health NHS Trust, London, United Kingdom.
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Kinematic risk factors for lower limb tendinopathy in distance runners: A systematic review and meta-analysis. Gait Posture 2019; 69:13-24. [PMID: 30658311 DOI: 10.1016/j.gaitpost.2019.01.011] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 12/05/2018] [Accepted: 01/09/2019] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Abnormal kinematics have been implicated as one of the major risk factors for lower limb tendinopathy (LLT). OBJECTIVE To systematically review evidence for kinematic risk factors for LLT in runners. METHODS Individual electronic searches in PubMed, EMBASE and Web of Science were conducted. Two reviewers screened studies to identify observational studies reporting kinematic risk factors in runners with LLT compared to healthy controls. The Down and Black appraisal scale was applied to assess quality. A meta-analysis was performed provided that at least two studies with similar methodology reported the same factor. RESULTS Twenty-eight studies were included: Achilles tendinopathy (AT) (9), iliotibial band syndrome (ITBS) (17), plantar fasciopathy (PF) (2), patellar tendinopathy (PT) (1), posterior tibial tendon dysfunction (PTTD) (1). Eighteen studies were rated high-quality and ten medium-quality. The meta-analyses revealed strong evidence of higher peak knee internal rotation, moderate evidence of lower peak rearfoot eversion and knee flexion at heel strike and greater peak hip adduction in runners with ITBS. Very limited evidence revealed higher peak ankle eversion in runners with PF and PTTD or higher peak hip adduction in PT. SIGNIFICANCE Peak rearfoot eversion was the only factor reported in all included LLTs; it is a significant factor in ITBS, PT and PTTD but not in AT and PF. More prospective studies are needed to accurately evaluate the role of kinematic risk factors as a cause of LLT. Taken together, addressing rearfoot kinematic and kinematic chain movements accompanied by peak eversion should be considered in the prevention and management of LLT.
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Influence of Aging on Lower Extremity Sagittal Plane Variability During 5 Essential Subphases of Stance in Male Recreational Runners. J Orthop Sports Phys Ther 2019; 49:171-179. [PMID: 30501387 DOI: 10.2519/jospt.2019.8419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND Interjoint coordination variability is a measure of the ability of the human system to regulate multiple movement strategies. Normal aging may reduce variability, resulting in a less adaptive system. Additionally, when older runners are asked to run at speeds greater than preferred, this added constraint may place older runners at greater risk for injury. OBJECTIVES To examine the influence of normal aging on coordination variability across 5 distinct subphases of stance in runners during preferred and fixed speeds. METHODS Twelve older (60 years of age or older) and 12 younger (30 years of age or younger) male recreational runners volunteered for this cross-sectional study. Three-dimensional gait analyses were collected at preferred and fixed speeds. Stance phase was divided into 5 subphases: (SP1) loading response, (SP2) peak braking, (SP3) peak compression, (SP4) midstance, and (SP5) peak propulsion. Continuous relative phase variability for sagittal plane joint pairs-hip-knee, knee-ankle, and hip-ankle-was calculated. Repeated-measures linear mixed models were employed to compare variability for each joint pair. RESULTS An age-by-stance subphase interaction was found for knee-ankle (P<.01) and hip-ankle (P<.01) pairs, while main effects for age and stance subphase were found for the hip-knee pair (P<.05). Specifically, loading response and peak braking variability were lower in older runners and greater across stance for knee-ankle and hip-ankle pairs, while midstance was lowest in the hip-knee pair for older and younger runners. No effects for running pace were found. CONCLUSION Less adaptive movement strategies seen in older runners may partially contribute to the increased eccentric stresses during periods of high load. J Orthop Sports Phys Ther 2019;49(3):171-179. Epub 30 Nov 2018. doi:10.2519/jospt.2019.8419.
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van der Vlist AC, Breda SJ, Oei EHG, Verhaar JAN, de Vos RJ. Clinical risk factors for Achilles tendinopathy: a systematic review. Br J Sports Med 2019; 53:1352-1361. [PMID: 30718234 PMCID: PMC6837257 DOI: 10.1136/bjsports-2018-099991] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/05/2019] [Indexed: 01/04/2023]
Abstract
Background Achilles tendinopathy is a common problem, but its exact aetiology remains unclear. Objective To evaluate the association between potential clinical risk factors and Achilles tendinopathy. Design Systematic review. Data sources The databases Embase, MEDLINE Ovid, Web of Science, Cochrane Library and Google Scholar were searched up to February 2018. Eligibility criteria To answer our research question, cohort studies investigating risk factors for Achilles tendinopathy in humans were included. We restricted our search to potential clinical risk factors (imaging studies were excluded). Results We included 10 cohort studies, all with a high risk of bias, from 5111 publications identified. There is limited evidence for nine risk factors: (1) prior lower limb tendinopathy or fracture, (2) use of ofloxacin (quinolone) antibiotics, (3) an increased time between heart transplantation and initiation of quinolone treatment for infectious disease, (4) moderate alcohol use, (5) training during cold weather, (6) decreased isokinetic plantar flexor strength, (7) abnormal gait pattern with decreased forward progression of propulsion, (8) more lateral foot roll-over at the forefoot flat phase and (9) creatinine clearance of <60 mL/min in heart transplant patients. Twenty-six other putative risk factors were not associated with Achilles tendinopathy, including being overweight, static foot posture and physical activity level. Conclusion From an ocean of studies with high levels of bias, we extracted nine clinical risk factors that may increase a person’s risk of Achilles tendinopathy. Clinicians may consider ofloxacin use, alcohol consumption and a reduced plantar flexor strength as modifiable risk factors when treating patients with Achilles tendinopathy. Trial registration number CRD42017053258.
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Affiliation(s)
- Arco C van der Vlist
- Department of Orthopedic Surgery, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Stephan J Breda
- Department of Radiology & Nuclear Medicine, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Edwin H G Oei
- Department of Radiology & Nuclear Medicine, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Jan A N Verhaar
- Department of Orthopedic Surgery, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Robert-Jan de Vos
- Department of Orthopedic Surgery, Erasmus MC University Medical Center, Rotterdam, The Netherlands
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Bito T, Tashiro Y, Suzuki Y, Kawagoe M, Sonoda T, Nakayama Y, Yokota Y, Aoyama T. Forefoot transverse arch height asymmetry is associated with foot injuries in athletes participating in college track events. J Phys Ther Sci 2018; 30:978-983. [PMID: 30154585 PMCID: PMC6110222 DOI: 10.1589/jpts.30.978] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 05/07/2018] [Indexed: 11/24/2022] Open
Abstract
[Purpose] The association between foot injuries and foot alignment, including the
transverse arch height (TAH) and asymmetry, was examined in athletes participating in
college track events. [Participants and Methods] This study included 55 male athletes
participating in a college track and field club. Data including demographic information
and the incidence of foot injuries within a year prior to participation in this study were
obtained via questionnaires. TAH and the medial longitudinal arch height during 10 and 90%
loading, leg-heel alignment, and the heel angle were measured before calculating the
asymmetry of each alignment parameter measured. Participants were categorized into an
injury or a normal group. Unpaired t-tests were used to perform between-group comparisons
for each alignment parameter measured and asymmetry. Additionally, logistic regression
analysis was performed to identify factors associated with foot injuries after adjustment
for demographic data. [Results] TAH asymmetry during 10 and 90% loading was significantly
greater in the injury group. Further logistic regression analysis performed showed that
only TAH asymmetry during 90% loading was significantly associated with foot injuries
after adjustment for demographic data. [Conclusion] With regard to track events, a greater
asymmetry of forefoot TAH in a weight-bearing position was observed to be associated with
foot injuries.
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Affiliation(s)
- Tsubasa Bito
- Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University: 53 Kawahara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Yuto Tashiro
- Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University: 53 Kawahara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Yusuke Suzuki
- Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University: 53 Kawahara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Mirei Kawagoe
- Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University: 53 Kawahara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Takuya Sonoda
- Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University: 53 Kawahara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Yasuaki Nakayama
- Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University: 53 Kawahara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Yuki Yokota
- Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University: 53 Kawahara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Tomoki Aoyama
- Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University: 53 Kawahara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
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Achilles Pain, Stiffness, and Muscle Power Deficits: Midportion Achilles Tendinopathy Revision 2018. J Orthop Sports Phys Ther 2018; 48:A1-A38. [PMID: 29712543 DOI: 10.2519/jospt.2018.0302] [Citation(s) in RCA: 134] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The Orthopaedic Section of the American Physical Therapy Association (APTA) has an ongoing effort to create evidence-based practice guidelines for orthopaedic physical therapy management of patients with musculoskeletal impairments described in the World Health Organization's International Classification of Functioning, Disability, and Health (ICF). The purpose of these revised clinical practice guidelines is to review recent peer-reviewed literature and make recommendations related to midportion Achilles tendinopathy. J Orthop Sports Phys Ther 2018;48(5):A1-A38. doi:10.2519/jospt.2018.0302.
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Gaulke R, Krettek C. [Tendinopathies of the foot and ankle : Evidence for the origin, diagnostics and therapy]. Unfallchirurg 2017; 120:205-213. [PMID: 28120032 DOI: 10.1007/s00113-016-0301-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Tendinopathies of the foot and ankle result in substantial impairment of the mobility of patients and have a high clinical significance. Knowledge of the origin of these diseases has been accumulated over decades from the multitude of intrinsic and extrinsic triggering factors based on biomechanical considerations with an evidence-based medicine (EBM) level 5. A high correlation between tendinopathy and hypervascularization of the Achilles tendon was found in a double-blind randomized prospective study using Doppler ultrasound (EBM level 1) but these results were not reproducible; therefore, the importance of these findings is unclear. Inspection and clinical examination supplemented by ultrasound and magnetic resonance imaging (MRI) are essential to achieve the correct diagnosis. The varying extent of load-dependent irritation of tendons and the surrounding tissues and the individual variation in experience of investigators mean that the results of clinical examinations are difficult to collate or not reproducible and cannot be investigated in studies. The expression of the varying results is difficult to assess even by the use of sonography and magnetic resonance imaging (MRI). Conservative treatment of tendinopathy is based on medical experience (EBM level 5). The effectiveness of physiotherapeutic eccentric loading and extracorporal shock wave treatment (ESWT) for Achilles tendinopathy was demonstrated in several case control studies and series (EBM level 3). Due to the high rate of healing with physiotherapy, surgery should only be performed following a minimum of 6-12 weeks of unsuccessful conservative treatment, because formation of scar tissue on the foot can result in permanent complaints (EBM level 4).
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Affiliation(s)
- Ralph Gaulke
- Sektion Obere Extremität, Fuß- und Rheumachirurgie, Unfallchirurgische Klinik, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, 30625, Hannover, Deutschland.
| | - Christian Krettek
- Sektion Obere Extremität, Fuß- und Rheumachirurgie, Unfallchirurgische Klinik, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, 30625, Hannover, Deutschland
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