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Benito de Pedro M, Benito de Pedro AI, Aguilera Rubio Á, Maté Muñoz JL, Hernández Lougedo J. Changes in the Activity of the Erector Spinae and Gluteus Medius Muscles with the Presence of Simulated Lower Limb Dysmetria. SENSORS (BASEL, SWITZERLAND) 2024; 24:1223. [PMID: 38400381 PMCID: PMC10892151 DOI: 10.3390/s24041223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/02/2024] [Accepted: 01/30/2024] [Indexed: 02/25/2024]
Abstract
(1) Background: Leg length discrepancy (LLD), regardless of its origin, is a very common pathology that can contribute to low back pain. Various authors have pointed out its relationship with the lack of activation of both the gluteus medius (GM) and the ipsilateral erector spinae (ES). The purpose of this study was to identify the activation of the ES and GM with different simulated LLDs, correlating this activation with LBP. In turn, we evaluated whether ES and GM activity has an effect on jumping ability using a CMJ test. (2) Method: A sample of healthy subjects was selected to whom an artificial LLD was applied using 0.5, 1, and 1.5 cm insoles. These three heights were measured using EMG while the subjects walked and performed a counter movement jump (CMJ). The measurements of the insole heights were carried out in random order using a Latin square. Muscle activation patterns were recorded for 30 s at each of the insole heights while the patients walked at 5.7 km/h and they were compared with the maximum voluntary contraction (MVC), both on the ipsilateral and contralateral sides. These muscles were then measured under the same circumstances during the performance of the CMJ. (3) Results: We found statistically significant differences in the flight heights in both the CMJ and DJ. In the comparison, significant differences were found in the flight heights of the CMJ and the DJ using the 5 mm insoles, and in the case of the DJ, also without insoles, with respect to the MVC. We found statistically significant differences in the activation of the GM with the differences in insoles, but not in the activation of the Es in relation to the different insole heights. (4) Conclusions: Insoles of different heights caused activation differences in the medius on the side where the insoles were placed. We can relate this difference in activation to LBP. In relation to the ES, no significant differences were found in the activation of the ipsilateral side of the insole.
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Affiliation(s)
- María Benito de Pedro
- Department of Physiotherapy, Faculty of Health HM, Camilo José Cela University, 28692 Madrid, Spain; (M.B.d.P.); (Á.A.R.); (J.H.L.)
| | - Ana Isabel Benito de Pedro
- Department of Physiotherapy, Faculty of Health HM, Camilo José Cela University, 28692 Madrid, Spain; (M.B.d.P.); (Á.A.R.); (J.H.L.)
| | - Ángela Aguilera Rubio
- Department of Physiotherapy, Faculty of Health HM, Camilo José Cela University, 28692 Madrid, Spain; (M.B.d.P.); (Á.A.R.); (J.H.L.)
| | - Jose Luis Maté Muñoz
- Department of Radiology, Rehabiilitation and Physiotherapy, Complutense University of Madrid, 28040 Madrid, Spain;
| | - Juan Hernández Lougedo
- Department of Physiotherapy, Faculty of Health HM, Camilo José Cela University, 28692 Madrid, Spain; (M.B.d.P.); (Á.A.R.); (J.H.L.)
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Shiwa T, Kawabata Y, Ishii T, Anan M. Effect of heel lift insertion on gait function in a patient with total hip arthroplasty with patient-perceived leg length difference: a case report. J Phys Ther Sci 2024; 36:81-86. [PMID: 38304151 PMCID: PMC10830159 DOI: 10.1589/jpts.36.81] [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: 09/05/2023] [Accepted: 11/02/2023] [Indexed: 02/03/2024] Open
Abstract
[Purpose] The effect of heel lift insertion on gait in patients who have undergone total hip arthroplasty (THA) with patient-perceived leg length difference is seldom referenced in the literature. We used an AB design to investigate the alterations of gait function before and after inserting a heel lift on the non-operative side. [Participant and Methods] The participant had a patient-perceived leg length difference after THA and presented with gait disturbance. The survey phase was 10 days (phase A: normal physiotherapy for five days, and phase B: normal physiotherapy and heel lift insertion for another five days) from the 17th day following THA. The ambulatory task was conducted at a self-determined, comfortable pace and objectively assessed using an inertial sensor. [Results] The insertion of a heel lift partially improved the gait symmetry and the ratio of lumbar acceleration in three directions; it also corrected the patient-perceived leg length difference. [Conclusion] An investigation was carried out to examine the impact of a heel lift on gait in a single case of THA with patient-reported leg length difference. The application of a heel lift may enhance the relationship between the patient-perceived leg length difference, gait symmetry, and the ratio of lumbar acceleration in three dimensions.
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Affiliation(s)
- Toru Shiwa
- Graduate School of Welfare Health Science, Oita University,
Japan
- Department of Rehabilitation, Soejima Orthopedic Hospital,
Japan
| | - Yuji Kawabata
- Department of Rehabilitation Medicine, Shuto General
Hospital, JA Yamaguchi Prefectural Welfare Federation of Agricultural Cooperative,
Japan
| | - Takako Ishii
- Department of Orthopedic, Soejima Orthopedic Hospital,
Japan
| | - Masaya Anan
- Physical Therapy Course, Faculty of Welfare and Health
Science, Oita University: 700 Dannoharu, Oita-shi, Oita 870-1192, Japan
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Mohamed-Saaid F, Sulaiman AR, Munajat I, Mohd EF, Arifin WN, Ghafar R. The Effects of Different Degrees of Leg Length Discrepancy on Vertical Ground Reaction Force in Children and Adults: Treatment Implications. Malays Orthop J 2023; 17:66-72. [PMID: 38107356 PMCID: PMC10723003 DOI: 10.5704/moj.2311.010] [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: 11/13/2022] [Accepted: 03/22/2023] [Indexed: 12/19/2023] Open
Abstract
Introduction Previous studies on the degree of leg length discrepancy that causes limb biomechanical problems did not differentiate between adults and children. We conducted this study to determine the effects of simulated leg length discrepancy on vertical ground reaction force in children and adults to enable decision-making for intervention in patients with leg length discrepancy for different age groups or heights. Materials and methods This cross-sectional study involved male volunteers of children 150cm and adults with 170cm in height. Vertical ground reaction force was measured using a gait analysis study. The first measurement was taken without any leg length discrepancy as a baseline. Subsequently, different amounts of leg length discrepancy were simulated on the left leg with shoe lifts of 2, 3, and 4cm. The measurements were repeated on each volunteer with similar shoe lifts on the right leg. Therefore, 14 volunteers provided simulations of 28 leg length discrepancies for each group. The first and second peaks of vertical ground reaction force were separately analysed. The vertical GRF of a simulated leg length discrepancy was compared with the baseline. Repeated measurement of analysis of variance (ANOVA) within each group was done. Results In both groups, the second peak of vertical ground reaction force in the longer leg reduced gradually as the shoe lift increased sequentially from 2 to 3cm and then to 4cm. A discrepancy of 3cm and above was statistically significant to cause a reduction in the vertical GRF on the longer limb in both height groups. Conclusion The degree of leg length discrepancy that caused significant changes in second peak ground reaction force in children with 150 and adults with 170cm height population was similar at 3cm. Therefore, the cut-off point for intervention for both groups are similar with additional consideration of future growth in children.
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Affiliation(s)
- F Mohamed-Saaid
- Department of Orthopaedics, Universiti Putra Malaysia, Serdang, Malaysia
| | - A R Sulaiman
- Department of Orthopaedics, Universiti Sains Malaysia, Kubang Kerian, Malaysia
| | - I Munajat
- Department of Orthopaedics, Universiti Sains Malaysia, Kubang Kerian, Malaysia
| | - E F Mohd
- Department of Orthopaedics, Universiti Sains Malaysia, Kubang Kerian, Malaysia
| | - W N Arifin
- Unit of Biostatistics and Research Methodology, Universiti Sains Malaysia, Kubang Kerian, Malaysia
| | - R Ghafar
- Exercise and Sports Science Program, Universiti Sains Malaysia, Kubang Kerian, Malaysia
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Gialanella B, Santoro R, Prometti P, Monguzzi V, Comini L. Functional ability before and after rehabilitation in elderly patients with shortening and/or rotational deformity of the lower limb after hip fracture. PM R 2023; 15:1106-1114. [PMID: 36201745 DOI: 10.1002/pmrj.12910] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 09/22/2022] [Accepted: 09/23/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND Shortening and rotational deformity of the lower limb (SRD) is a major complication of hip fracture surgery. It causes not only hip joint dysfunction but also functional impairments due to abnormal gait parameters, decreased gait velocity, and poor balance. Despite a number of previous studies, the effect of SRD on the postsurgical recovery of these patients is still not clear. OBJECTIVE To compare the functional abilities and balance before and after rehabilitation for people with and without SRD after hip fracture surgery and to assess whether SRD affects rehabilitation. DESIGN Prospective observational study. SETTING Inpatients of a rehabilitation unit. PARTICIPANTS A total of 102 people with hip fracture (62 without SRD and 40 with SRD at the time of admission to the unit). MAIN OUTCOME MEASURES Berg Balance Scale (BBS) and Functional Independence Measure (FIM) motor score, administered before and after rehabilitation. INTERVENTIONS Motor rehabilitation. RESULTS Before rehabilitation, patients with SRD had lower motor-FIM (p = .002) and BBS (p = .001) scores than those without SRD. After rehabilitation, both groups showed similar improvements in motor-FIM, BBS, range of motion, muscle strength, and pain scores (p < .001, for all), but patients with SRD still had lower motor-FIM and BBS scores (p = .014 and .003, respectively) and lower effectiveness in motor-FIM and BBS (p = .039 and p = .034, respectively) than those without SRD. CONCLUSIONS SRD is associated with lower levels of balance and functional abilities before and after rehabilitation and it adversely affects rehabilitation for patients with hip fractures.
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Affiliation(s)
- Bernardo Gialanella
- Istituti Clinici Scientifici Maugeri IRCCS, Operative Unit for Recovery and Functional Rehabilitation of the Institute of Lumezzane, Brescia, Italy
| | - Raffaele Santoro
- Istituti Clinici Scientifici Maugeri IRCCS, Operative Unit for Recovery and Functional Rehabilitation of the Institute of Lumezzane, Brescia, Italy
| | - Paola Prometti
- Istituti Clinici Scientifici Maugeri IRCCS, Operative Unit for Recovery and Functional Rehabilitation of the Institute of Lumezzane, Brescia, Italy
| | - Vittoria Monguzzi
- Istituti Clinici Scientifici Maugeri IRCCS, Operative Unit for Recovery and Functional Rehabilitation of the Institute of Lissone, Monza-Brianza, Italy
| | - Laura Comini
- Istituti Clinici Scientifici Maugeri IRCCS, Scientific Direction of the Institute of Lumezzane, Brescia, Italy
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Jankaew A, Chen SJ, Lin CC, Tsai CH, Huang MT, Lin CF. Impact of bilateral motion control shoes with outsole adjustment on gait asymmetry in individuals with mild leg length discrepancy. Gait Posture 2023; 103:80-85. [PMID: 37141834 DOI: 10.1016/j.gaitpost.2023.04.023] [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: 11/04/2022] [Revised: 02/07/2023] [Accepted: 04/26/2023] [Indexed: 05/06/2023]
Abstract
BACKGROUND Footwear adjustment is recommended in the management plan of leg length discrepancy. However, it is not clear how the outsole of motion control shoe adjustment influences trunk symmetry and walking performance. RESEARCH QUESTION Does bilateral adjustment of the outsole affect trunk and pelvis symmetry and ground reaction force during walking in individuals with leg length discrepancy? METHODS 20 mild leg length discrepancy participants were recruited into a cross-sectional study. All subjects performed a walking trial with their habitual shoes to determine the outsole adjustment. Four trials of walking were carried out in the order of unadjusted and bilateral adjusted motion control air-cushion shoes. Shoulder level differences and trunk and pelvic motion were assessed, while the ground reaction force at the heel strike was reported. A paired t-test was performed to compare the differences between the conditions with a significance level at p < 0.05. RESULTS During walking trials, mild leg length discrepancy participants with the adjusted shoe displayed lower variations in the maximum shoulder height differences (p = 0.001) and trunk rotation angle (p = 0.002) than those with the unadjusted shoe. Also, there was a significant reduction in the vertical ground reaction force (p = 0.030), but not in the anteroposterior or mediolateral directions, during walking in the adjusted shoe condition compared to the unadjusted shoe condition. SIGNIFICANCE The outsole adjustment of the bilateral motion control shoes can improve trunk symmetry while decreasing the ground impact at the heel strike. The study provides additional information to prescribe or recommend footwear adjustment to improve walking symmetry in leg length discrepancy participants.
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Affiliation(s)
- Amornthep Jankaew
- Institute of Allied Health Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Shing-Jye Chen
- Department of Product Design, College of Design, Tainan University of Technology, Tainan, Taiwan
| | - Cheng-Chieh Lin
- Department of Physical Therapy, Shu-Zen Junior College of Medicine and Management, Kaohsiung, Taiwan
| | - Cheng-Hsin Tsai
- Department of Physical Therapy, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Ming-Tung Huang
- Department of Orthopedic Surgery, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Cheng-Feng Lin
- Institute of Allied Health Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Physical Therapy, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Physical Therapy Center, National Cheng Kung University Hospital, Tainan, Taiwan.
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Beauchesne N, Wagenaar-Tison A, Brousseau-Foley M, Moisan G, Cantin V, Blanchette V. Using a contralateral shoe lift to reduce gait deterioration during an offloading fast-walk setting in diabetic peripheral neuropathy: A comparative feasibility study. Diabetes Res Clin Pract 2023; 199:110647. [PMID: 37003479 DOI: 10.1016/j.diabres.2023.110647] [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: 01/07/2023] [Revised: 03/10/2023] [Accepted: 03/24/2023] [Indexed: 04/01/2023]
Abstract
AIMS Diabetic peripheral neuropathy (DPN) is a predictor of foot ulcers and leads to sedentary behaviour. This comparative study evaluated gait and feasibility of a 20-minute fast walk, at 40-60% of cardiopulmonary capacity, in individuals with DPN wearing an offloading boot and a contralateral shoe balancer. METHODS Gait parameters were measured with inertial sensors on 32 individuals (group with DPN [n = 16], group with diabetes but without DPN [n = 9], and a group without diabetes/DPN [n = 7]). Feasibility was assessed by feedback on perceived effort and adverse events. Gait outcomes were compared between groups with or without a shoe balancer using one-way ANOVAs. RESULTS The three groups were equivalent in terms of activity level and age and gender except for the body mass index. Both groups with diabetes exhibited minimal decreased gait speed (p > 0.005) and the DPN group exhibited increased double-support percentage (+4.6%, p = 0.01) while walking with an offloading boot and contralateral shoe balancer. The use of a contralateral shoe balancer reduced gait asymmetry. Lower physical activity level was associated with further gait deterioration in all groups. Few adverse events were reported, and 91% of participants reported that the proposed activity would be feasible daily. CONCLUSIONS The offloading boot deteriorated gait function, but a contralateral shoe balancer minimized its impact, especially in the context of physical activity in people with diabetes and DPN.
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Affiliation(s)
- Nikolas Beauchesne
- Department of Human Kinetics and Podiatric Medicine, Université du Québec à Trois-Rivières, 3351, boul. des Forges, C.P. 500, Trois-Rivières G9A 5H7, Canada
| | | | - Magali Brousseau-Foley
- Department of Human Kinetics and Podiatric Medicine, Université du Québec à Trois-Rivières, 3351, boul. des Forges, C.P. 500, Trois-Rivières G9A 5H7, Canada; Centre intégré universitaire de santé et de services sociaux de la Mauricie et du Centre-du-Québec (CIUSSS-MCQ) affiliated to Université de Montréal, Faculty of Medicine, Trois-Rivières Family Medicine University Clinic, 731, rue Ste-Julie, 2nd Floor, Trois- Rivières G9A 1X9, Canada
| | - Gabriel Moisan
- Department of Human Kinetics and Podiatric Medicine, Université du Québec à Trois-Rivières, 3351, boul. des Forges, C.P. 500, Trois-Rivières G9A 5H7, Canada
| | - Vincent Cantin
- Department of Human Kinetics and Podiatric Medicine, Université du Québec à Trois-Rivières, 3351, boul. des Forges, C.P. 500, Trois-Rivières G9A 5H7, Canada
| | - Virginie Blanchette
- Department of Human Kinetics and Podiatric Medicine, Université du Québec à Trois-Rivières, 3351, boul. des Forges, C.P. 500, Trois-Rivières G9A 5H7, Canada; Centre de recherche du Centre intégré de santé et services sociaux de Chaudière-Appalaches (CISSS-CA), 143 rue Wolfe, Lévis G6V 3Z1, Canada; VITAM - Sustainable Health Research Centre, 2480, Rue de la Carnardière, Québec G1J 2G1, Canada.
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Bibrowicz K, Szurmik T, Ogrodzka-Ciechanowicz K, Hudakova Z, Gąsienica-Walczak B, Kurzeja P. Asymmetry of the pelvis in Polish young adults. Front Psychol 2023; 14:1148239. [PMID: 37034935 PMCID: PMC10075204 DOI: 10.3389/fpsyg.2023.1148239] [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: 01/19/2023] [Accepted: 02/23/2023] [Indexed: 04/11/2023] Open
Abstract
Introduction Symmetry is one of the criteria of correct body posture in upright position. The spatial positioning of the pelvic girdle is crucial to it. Functional and structural asymmetries within the lumbo-pelvic-hip complex can have a significant influence on the structure and functions of many human body organs and systems. The aim of the study was to present the results of inclinometer measurements of selected landmarks of the pelvic girdle in young adults aged 19-29. Methods The analysis of occurrence of spatial pelvic asymmetry was based on the authors' original, clinical classification and the significance of the body mass and height for the analyzed asymmetries. The inclinometer measurements of the selected landmarks of the pelvic girdle were performed in a sample consisting of 300 young individuals. Then, the occurrences of the spatial asymmetry of the pelvis were analyzed based on the authors' own clinical classification using alignment symmetry of the iliac crests, the anterior superior iliac spines and the trochanters major as a criterion. All study subjects with asymmetry <1 degree were treated as those with a symmetrical pelvis. Results The significance of gender, body mass and height for the analyzed asymmetries was assessed. Symmetric positioning of the iliac crests was observed in only 32% of the respondents. The iliac crest depression on the left side was more frequently observed - in 41% of the respondents. This occurred more often in women (44%) than in men (38%). In the group of women, the rotated pelvis was the most often observed (39.4%) asymmetry, while for men, it was the oblique pelvis (40%). More detailed analysis by pelvic asymmetry subtypes showed their statistical differentiation between women and men (p < 0.0001). Analysis of moderate rotation of the pelvis for men, were reported slightly higher values but these differences were not statistically significant (p = 0.253). Women, in turn, showed slightly higher mean values but here too, the differences were not statistically significant (p = 0.245). Discussion Asymmetries in the pelvis area are common; they were observed in less than three-quarters of the examined population. Oblique pelvis was found in less than a quarter of women and in more than one-third men with the predominant structural asymmetries. Rotated pelvis was observed in more than one-third of women and men with dominating functional asymmetries. There were no linear correlations between the body mass and height, and the angle of asymmetries.
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Affiliation(s)
- Karol Bibrowicz
- Science and Research Center of Body Posture, Kazimiera Milanowska College of Education and Therapy, Poznan, Poland
| | - Tomasz Szurmik
- Faculty of Arts and Educational Science, University of Silesia, Cieszyn, Poland
| | | | - Zuzana Hudakova
- Faculty of Health, Catholic University, Ružomberok, Slovakia
- Department of Health Care Studies, College of Polytechnics, Jihlava, Czechia
- SNP Central Military Hospital, Faculty Hospital, Ružomberok, Slovakia
| | | | - Piotr Kurzeja
- Institute of Health Sciences, Podhale State College of Applied Sciences, Nowy Targ, Poland
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Miyagi I, Ohta M, Tamari M. Effect of Leg Length Discrepancy on Dynamic Gait Stability. Prog Rehabil Med 2023; 8:20230013. [PMID: 37091134 PMCID: PMC10118994 DOI: 10.2490/prm.20230013] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 04/05/2023] [Indexed: 04/25/2023] Open
Abstract
Objectives : It is unclear whether the increased center of mass lateral shift during gait induced by leg length difference induces lateral instability. The purpose of this study was to investigate the effect of leg length discrepancy (LLD) on dynamic gait stability and the compensatory kinematic and dynamic strategies for this effect by using the extrapolated center of mass and margin of stability. Methods : Nineteen healthy male participants walked without insoles (no LLD condition; 0 cm) and with added insoles (LLD condition; 3 cm). Kinematic and kinetic data were analyzed using a three-dimensional motion analyzer and force plates; the values were compared between the two conditions. Correlation analysis was performed on the parameters and the margin of stability and significant changes were identified. Results Compared with the no-LLD condition, in the LLD condition, lateral stability was maintained on both the short leg side and the long leg side. Nonetheless, changes in joint angles and muscle activity on the frontal plane were observed on the short leg side, although the correlations were not significant. On the long leg side, a moderate negative correlation was found between the lateral flexion angle of the trunk and the margin of stability (r=-0.56, P=0.011). Conclusions The short leg side may compensate for lateral stability by complex changes in joint angles and muscle activity, and the long leg side may compensate for lateral stability by actively adjusting the trunk lateral flexion angle.
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Affiliation(s)
- Issei Miyagi
- Yokohamashintoshi Neurosurgery Hospital, Kanagawa,
Japan
| | - Mizuho Ohta
- Reiwa Health Sciences University, Fukuoka, Japan
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Bampouras TM, Thomas NM. Validation of a LiDAR-based player tracking system during football-specific tasks. SPORTS ENGINEERING 2022. [DOI: 10.1007/s12283-022-00372-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractTracking players’ movements in sports is important to monitor and optimise exercise volume, avoid injuries, and enhance game performance. A new LiDAR-based system (Sportlight®) purports to provide accurate velocity and acceleration metrics derived from player movements. This study examined the validity of the LiDAR-based system against a 3D motion analysis system. Two competitive football players (age: 18 years, height: 1.74 ± 0.01 m, mass: 66.5 ± 7.8 kg; playing experience at this level: 3 years) completed nine trials each of six sport-specific movements, consisting of straight-line sprints, cuts, and curved runs. Trials were recorded concurrently by a four-unit LiDAR system and a 64-camera 3D motion analysis system. Instantaneous velocity and acceleration, and time spent within key performance indicator bands (defined by velocity and acceleration thresholds) were compared between systems. Agreement between the systems was evaluated by root mean square error. Differences in time spent within each key performance indicator band between systems were assessed with t tests and standardised effect sizes. Velocity root mean square error values ranged from 0.04 to 0.14 m·s−1 across all movements and acceleration root mean square error values ranged from 0.16 to 0.7 m·s−2. Differences between systems for time spent within each key performance indicator band were mostly trivial. These results show that the LiDAR-based system can provide valid measures of velocity and acceleration in football-specific tasks, thus providing accurate tracking of players and calculation of relevant key performance indicators.
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Sculco PK, Wright T, Malahias MA, Gu A, Bostrom M, Haddad F, Jerabek S, Bolognesi M, Fehring T, Gonzalez DellaValle A, Jiranek W, Walter W, Paprosky W, Garbuz D, Sculco T, Abdel M, Boettner F, Benazzo F, Buttaro M, Choi D, Engh CA, Garcia-Cimbrelo E, Garcia-Rey E, Gehrke T, Griffin WL, Hansen E, Hozack WJ, Jones S, Lee GC, Lipman J, Manktelow A, McLaren AC, Nelissen R, O’Hara L, Perka C, Sporer S. The Diagnosis and Treatment of Acetabular Bone Loss in Revision Hip Arthroplasty: An International Consensus Symposium. HSS J 2022; 18:8-41. [PMID: 35082557 PMCID: PMC8753540 DOI: 10.1177/15563316211034850] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 07/07/2021] [Accepted: 07/07/2021] [Indexed: 11/21/2022]
Abstract
Despite growing evidence supporting the evaluation, classification, and treatment of acetabular bone loss in revision hip replacement, advancements have not been systematically incorporated into a single document, and therefore, a comprehensive review of the treatment of severe acetabular bone loss is needed. The Stavros Niarchos Foundation Complex Joint Reconstruction Center at Hospital for Special Surgery held an Acetabular Bone Loss Symposium on June 21, 2019, to answer the following questions: What are the trends, emerging technologies, and areas of future research related to the evaluation and management of acetabular bone loss in revision hip replacement? What constitutes the optimal workup and management strategies for acetabular bone loss? The 36 international experts convened were divided into groups, each assigned to discuss 1 of 4 topics: (1) preoperative planning and postoperative assessment; (2) implant selection, management of osteolysis, and management of massive bone loss; (3) the treatment challenges of pelvic discontinuity, periprosthetic joint infection, instability, and poor bone biology; and (4) the principles of reconstruction and classification of acetabular bone loss. Each group came to consensus, when possible, based on an extensive literature review. This document provides an overview of these 4 areas, the consensus each group arrived at, and directions for future research.
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Affiliation(s)
- Peter K. Sculco
- Hospital for Special Surgery, New York, NY, USA,Peter K. Sculco, MD, Hospital for Special Surgery, 535 E. 70th St., New York, NY 10021, USA.
| | | | | | - Alexander Gu
- George Washington University School of Medicine & Health Sciences, Washington, DC, USA
| | | | - Fares Haddad
- University College London Hospitals NHS Foundation Trust and Institute of Sport, Exercise & Health, London, UK
| | | | | | | | | | | | - William Walter
- Royal North Shore Hospital, St. Leonards, NSW, Australia
| | - Wayne Paprosky
- Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, IL, USA
| | - Donald Garbuz
- Department of Orthopaedics, The University of British Columbia, Vancouver, BC, Canada
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Applebaum A, Nessim A, Cho W. Overview and Spinal Implications of Leg Length Discrepancy: Narrative Review. Clin Orthop Surg 2021; 13:127-134. [PMID: 34094002 PMCID: PMC8173231 DOI: 10.4055/cios20224] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 11/20/2020] [Accepted: 12/23/2020] [Indexed: 11/25/2022] Open
Abstract
Leg length discrepancy (LLD) is an underrecognized and prevalent condition among the U.S. population, with effects varying depending on the cause and size of the discrepancy. LLD occurs when the paired lower extremities are unequal in length and can be etiologically classified as functional or structural. Length differences are typically less than 10 mm and asymptomatic or easily compensated for by the patient through self-lengthening or shortening of the lower extremities. Literature review of the etiology, diagnostic modalities, clinical complications, and treatment option for patients with LLD. LLD can be assessed directly through tape measurements or indirectly through palpation of bony landmarks. Imaging modalities, specifically radiography, are more precise and help identify coexistent deformity. Once LLD has been diagnosed, evaluation for potential adverse complications is necessary. Discrepancies greater than 20 mm can alter biomechanics and loading patterns with resultant functional limitations and musculoskeletal disorders, such as functional scoliosis. Functional scoliosis is nonprogressive and involves a structurally normal spine with an apparent lateral curvature, which regresses fully or partially when the LLD is corrected. Long-standing LLD and functional scoliosis often result in permanent degenerative changes in the facet joints and intervertebral discs of the spine. Further understanding of the contribution of LLD in the development of scoliosis and degenerative spine disease will allow for more effective preventative treatment strategies and hasten return to function.
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Affiliation(s)
- Ariella Applebaum
- Department of Orthopedic Surgery, Montefiore Medical Center and Albert Einstein College of Medicine, Bronx, NY, USA
| | - Adam Nessim
- Department of Orthopedic Surgery, Montefiore Medical Center and Albert Einstein College of Medicine, Bronx, NY, USA
| | - Woojin Cho
- Department of Orthopedic Surgery, Montefiore Medical Center and Albert Einstein College of Medicine, Bronx, NY, USA
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Wiesław Błaszczyk J, Fredyk A, Mikołaj Błaszczyk P. Transition from double-leg to single-leg stance in the assessment of postural stability. J Biomech 2020; 110:109982. [DOI: 10.1016/j.jbiomech.2020.109982] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 07/13/2020] [Accepted: 07/30/2020] [Indexed: 01/08/2023]
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