scholarly journals Reference values for fatigued versus non-fatigued limb symmetry index measured by a newly designed single-leg hop test battery in healthy subjects: a pilot study

2017 ◽  
Vol 14 (1) ◽  
pp. 105-113 ◽  
Author(s):  
Iris Leister ◽  
Georg Mattiassich ◽  
Harald Kindermann ◽  
Reinhold Ortmaier ◽  
Jürgen Barthofer ◽  
...  
Keyword(s):  
Pilot Study ◽  
Reference Values ◽  
Healthy Subjects ◽  
Test Battery ◽  
Symmetry Index ◽  
Limb Symmetry Index ◽  
Hop Test ◽  
Single Leg Hop Test

Evolution of Functional Recovery using Hop Test Assessment after ACL Reconstruction

2020 ◽  
Vol 41 (10) ◽  
pp. 696-704
Author(s):  
Alexandre J.M. Rambaud ◽  
Jérémy Rossi ◽  
Thomas Neri ◽  
Pierre Samozino ◽  
Pascal Edouard
Keyword(s):  
Functional Recovery ◽  
Functional Performance ◽  
Cruciate Ligament ◽  
Return To Sport ◽  
Interquartile Range ◽  
Return To Play ◽  
Symmetry Index ◽  
Limb Symmetry Index ◽  
Hop Tests ◽  
Hop Test

AbstractThe purpose of this study was to evaluate improvements in functional performance through the use of the Limb Symmetry Index of Single and Triple Hop tests between 12 and 52 weeks after anterior cruciate ligament reconstruction, and to compare these values with usual time-based and performance-based criteria used during the return to sport continuum. Repeated functional assessments using Single and Triple Hop Tests at 12, 16, 22, 26, 39 and 52 postoperative weeks were evaluated. At each session, the median and interquartile range of Limb Symmetry Index of tests were calculated and compared with the usual criteria: return to participation:≥85%, between 12–16 w; return to play:≥90%, between 26–39 w. The results indicate that the median increased over time to 39 postoperative weeks and then stabilized. For Single Hop Test, wide variability was seen at 12 and 16 weeks (interquartile range=20%); this was lower from 22 to 52 weeks (interquartile range=8–6%). At 12 weeks for Single Hop Test, the median was 83.6% and did not meet>85% criteria for return to participation. Hop tests could be interesting functional tests to follow the functional recovery and help decision-making regarding return to participation and return to play.

Side Differences Regarding the Limb Symmetry Index in Healthy Professional Athletes

2020 ◽  
Author(s):  
Christophe Lambert ◽  
Thomas Pfeiffer ◽  
Maxime Lambert ◽  
Benedikt Brozat ◽  
Daniel Lachmann ◽  
...  
Keyword(s):  
Return To Sport ◽  
Professional Athletes ◽  
P Value ◽  
Return To Sports ◽  
Rehabilitation Process ◽  
Symmetry Index ◽  
Limb Symmetry Index ◽  
Hop Tests ◽  
Chi Squared ◽  
Hop Test

AbstractSide differences in the limb symmetry index during hop tests have been rarely investigated in uninjured athletes. Unknown differences can result in false interpretation of hop tests and affect return to sport decision. Hypothesis was that un-injured athletes in Judo and Taekwondo have side differences in hop test and that asymmetries can be predicted based on the athletes fighting display. Differences, risk relationships were analyzed using the chi-squared test and the odds ratio. A two-tailed p value of<0.05 was considered statistically significant. 115 athletes from the national teams were included (mean age 18.4 years; range 13–27 years). 93, 97.4 and 98.3% did not have symmetric hop distance for three hop tests. Up to a quarter did not reach a limb symmetry index of>90. Moreover, 57.4% (n=66) reached longer jumping distance with the standing leg. Ignoring such pre-existent side differences in evaluation of hop tests and not knowing which limb was dominant prior the injury, can lead to premature or delayed return to sports in the rehabilitation process. Therefore, it might be helpful to refer to individual jump lengths for each limb in case of injury by using hop tests in pre-season screening in professional athletes in Judo and Taekwondo.

scholarly journals Return to Sport After ACL Reconstruction: Strength and Functionality Testing

2021 ◽  
Vol 1 (5) ◽  
pp. 263502542110405
Author(s):  
Simon J. Padanilam ◽  
Steven R. Dayton ◽  
Ryan Jarema ◽  
Michael J. Boctor ◽  
Vehniah K. Tjong
Keyword(s):  
Acl Reconstruction ◽  
Cruciate Ligament ◽  
Return To Sport ◽  
Rehabilitation Program ◽  
Isokinetic Testing ◽  
Symmetry Index ◽  
Limb Symmetry Index ◽  
Rehabilitation Programs ◽  
Increased Risk ◽  
Hop Test

Background: Functionality testing following anterior cruciate ligament (ACL) reconstruction can benefit clinicians and patients in determining readiness for return to sport. While a component of a multifactorial decision, inability to perform well on these tests predicts increased risk of reinjury. As of 2013, only 41% of orthopaedic surgeons report using strength or functionality testing in evaluating patients for return to sport (RTS). Indications: In the intermediate to late stages of their rehabilitation program, patients may undergo these tests to determine readiness and safety to return to sport. Technique Description: The tests described in this video include the single and triple hop for distance, triple crossover hop, single and double vertical leg jump tasks, drop jump landing task, and isokinetic and isometric strength testing. Results: Clinicians who incorporate these tests into patient rehabilitation programs may reduce patient risk of ACL reinjury by 75% to 84%. The limb symmetry index (LSI) is a reliable calculated measure for these tests, with a strong reliability for the hop tests. The limb symmetry index can be calculated for each test and represents the ratio of measured performance of the involved, or post-ACL reconstruction, leg when compared against the uninvolved leg. The commonly used limb symmetry index threshold for passing each hop test is 90%. Patients who score 90% or greater on each of these tests are less likely to experience knee reinjury. Discussion/Conclusion: The ability of knee strength and functionality tests in determining RTS following ACL reconstruction has been highlighted as a tool in potentially reducing risk of knee reinjury. Other isometric and isokinetic testing can be used in addition to the described functionality tests but may not be possible in certain practices due to equipment and funding limitations. Usage of these strength and functionality tests, in conjunction with clinician evaluation, may lead to more optimal outcomes for patients and lower rates of reinjury. Psychological assessment may aid in evaluating patient readiness for return to sport. Importantly, further sport-specific testing is still recommended and will optimize patient outcomes.

Age-stratified pediatric reference values of lymphocytes in the Moroccan population

2020 ◽  
pp. 1-10
Author(s):  
Aicha El Allam ◽  
Sara El Fakihi ◽  
Hicham Tahoune ◽  
Karima Sahmoudi ◽  
Houria Bousserhane ◽  
...  
Keyword(s):  
T Lymphocytes ◽  
Reference Values ◽  
Blood Lymphocyte ◽  
Healthy Subjects ◽  
Lymphocyte Subsets ◽  
Age Groups ◽  
Lymphocyte Subpopulation ◽  
Study Group ◽  
Moroccan Population ◽  
Helper T Lymphocytes

The number of circulating lymphocytes is altered in a number of diseases including either increase (lymphocytosis) or decrease (lymphocytopenia). Therefore, the assessment of total blood lymphocyte numbers and the relative distribution of lymphocyte subsets is a critical front-line tool in the clinical diagnosis of a number of diseases, including pediatric diseases and disorders. However, the interpretation of this data requires comparison of patient’s results to reliable reference values. Blood lymphocyte subpopulation numbers are also subject to genetic polymorphisms, immunogenic and environmental factors and vary greatly between populations. While the best practice reference values should be established within local representative populations of healthy subjects, to date, Caucasian reference values are used in Morocco due to the absence of indigenous reference values. Potential differences in blood lymphocyte subpopulation reference values between Caucasian versus Moroccan populations can adversely affect the diagnosis of pediatric and childhood diseases and disorders such as primary immunodeficiency (PID) in Morocco. OBJECTIVE: The aim of this study was to establish the age-stratified normal reference values of blood lymphocyte subsets for the pediatric Moroccan population. METHODS: We measured the concentration of lymphocyte subpopulations by flow cytometry from 83 Moroccan healthy subjects stratified into 5 age groups of 0–1, 1–2, 2–6, 6–12 and > 12–18 (adult). RESULTS: The absolute and relative amounts of the main lymphocyte subsets of T-cells, B cells and Natural Killer (NK) cells were measured and compared to previously described reference values from Cameroonian, Turkish, American and Dutch populations. Additionally, we also observed an age-related decline in the absolute population sizes of lymphocyte subsets within our study group. Relative proportions of CD3+CD4+ helper T lymphocytes decreased with increasing age and by 12 years-adult age, both proportions of CD3+CD4+ helper T lymphocytes and CD3+CD8+ cytotoxic T lymphocytes, as well as CD3-CD19+ B lymphocytes were also decreased. Finally, we compared the median values and range of our Moroccan study group with that of published results from Cameroon, Turkey, USA and Netherlands and observed significant differences in median and mean values of absolute number and relative proportions of lymphocyte subsets especially at 0–1 years and 1–2 years age groups. Above age 12 years, the Moroccan values were lower. For NK cells, the Moroccan values are also lower. CONCLUSIONS: The results of this study have a significant impact in improving the threshold values of the references intervals routinely used in the diagnosis of paediatric diseases such as PIDs or mother-to-child transmitted HIV within the Moroccan population.

scholarly journals Isokinetic Trunk Strength in Acute Low Back Pain Patients Compared to Healthy Subjects: A Systematic Review

2021 ◽  
Vol 18 (5) ◽  
pp. 2576
Author(s):  
Waleska Reyes-Ferrada ◽  
Luis Chirosa-Rios ◽  
Angela Rodriguez-Perea ◽  
Daniel Jerez-Mayorga ◽  
Ignacio Chirosa-Rios
Keyword(s):  
Systematic Review ◽  
Low Back Pain ◽  
Back Pain ◽  
Reference Values ◽  
Healthy Subjects ◽  
Isokinetic Strength ◽  
Low Back ◽  
Acute Low Back Pain ◽  
Trunk Strength

Background: The purpose of this systematic review was to: (I) determine the quality of evidence from studies assessing trunk isokinetic strength in subjects with acute low back pain (ALBP) compared to healthy subjects and (II) establish reference values of isokinetic trunk strength in subjects with ALBP. Methodology: Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) statements were followed using keywords associated with trunk, strength and low back pain. Four databases were used: PubMed, Web of Science, Scopus and SPORTDiscus. Methodological quality was assessed using the Quality Assessment of Diagnostic Accuracy Studies (QUADAS). Results: A total of 1604 articles were retrieved, four included in this review. All were evaluated as high risk of bias (Rob). Due to the high Rob and the diversity of protocols, instruments and variables used, it was not possible to determine reference values for subjects with ALBP, we can only establish a range of flexion peak torque (PT) between 175.1 and 89.7 Nm at 60°/s and between 185 and 81.5 Nm at 120°/s, and for extension PT between 240.0 and 91.5 Nm at 60°/s and between 217.5 and 69.2 Nm at 120°/s in subjects with ALBP. Conclusions: Due to the low quality of the evidence and the diversity of protocols used when measuring trunk isokinetic strength, it is necessary to carry out new high-quality research to establish reference values of trunk strength in subjects with ALBP.

Limb Preference Impacts Single‐Leg Forward Hop Limb Symmetry Index (LSI) Values Following ACL Reconstruction

2021 ◽  
Author(s):  
Brooke Farmer ◽  
Dillon Anderson ◽  
Dimitrios Katsavelis ◽  
Jennifer J. Bagwell ◽  
Kimberly A. Turman ◽  
...  
Keyword(s):  
Acl Reconstruction ◽  
Symmetry Index ◽  
Limb Symmetry Index
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