scholarly journals Normative data and correlation between dynamic knee valgus and neuromuscular response among healthy active males: a cross-sectional study

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Luis Llurda-Almuzara ◽  
Albert Pérez-Bellmunt ◽  
Carlos López-de-Celis ◽  
Ramón Aiguadé ◽  
Roberto Seijas ◽  
...  
Keyword(s):  
Cruciate Ligament ◽  
Biceps Femoris ◽  
Cross Sectional Study ◽  
Medial Gastrocnemius ◽  
Ligament Injury ◽  
Knee Valgus ◽  
Cross Sectional ◽  
Neuromuscular Response ◽  
Central Nervous System Activity ◽  
Correlational Data

AbstractThe dynamic knee valgus (DKV) during different sport maneuvers has been widely described as risk factor to develop an anterior cruciate ligament injury. Hip and knee muscles seem to have a crucial role to prevent the dynamic knee valgus. This study aimed to give normative and correlational data about DKV and hip and knee neuromuscular response (NMR) among healthy active males. The hypothesis is that DKV could be correlated with hip NMR. A cross-sectional correlational study. Research Anatomy Laboratory. The study was carried out among 50 active, non-injured males. Dynamic Knee-Valgus angle and lower limb posterior chain muscles Neuromuscular Response. DKV was measured using Kinovea software during a Single-Legged Drop Jump test and NMR was measured using tensiomyography and myotonometry for gluteus maximum, biceps femoris, semitendinosus, lateral and medial gastrocnemius. Right and left limbs were both performed and analyzed independently. No significant correlation was observed between DKV and hip and knee muscles NMR. This study shows normative and correlational data about dynamic knee valgus, tensiomyography and myotonometry for healthy and active males. The DKV control seems to be non-correlated with isolated hip and knee muscles NMR so this suggests it is more about Central Nervous System activity than about isolated muscles NMR.

scholarly journals Anterior cruciate ligament injury patterns and their relationship to fatigue and physical fitness levels – a cross-sectional study

Medicine ◽  
2021 ◽  
Vol 100 (1) ◽  
pp. e24171
Author(s):  
Saud F. Alsubaie ◽  
Walid Kamal Abdelbasset ◽  
Abdulaziz A. Alkathiry ◽  
Waleed M. Alshehri ◽  
Mohammed M. Azyabi ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Physical Fitness ◽  
Anterior Cruciate Ligament Injury ◽  
Cruciate Ligament ◽  
Cross Sectional Study ◽  
Ligament Injury ◽  
Sectional Study ◽  
Injury Patterns ◽  
Cross Sectional ◽  
Anterior Cruciate

scholarly journals Clinical Implications of Landing Distance on Landing Error Scoring System Scores

2021 ◽  
Vol 56 (6) ◽  
pp. 572-577
Author(s):  
Ivana Hanzlíková ◽  
Kim Hébert-Losier
Keyword(s):  
Scoring System ◽  
Injury Risk ◽  
Cruciate Ligament ◽  
Body Height ◽  
Cross Sectional Study ◽  
Ligament Injury ◽  
Cross Sectional ◽  
Individual Level ◽  
Anterior Cruciate ◽  
Risk Categorization

Context The Landing Error Scoring System (LESS) screens for risk of noncontact anterior cruciate ligament injury. The LESS requires individuals to jump forward from a 30-cm box to a distance of 50% of their body height. However, different landing distances have been cited in the scientific literature. Objective To examine whether landing distance influences LESS outcomes. Design Cross-sectional study. Setting Laboratory. Participants or Other Participants Seventy young active individuals (34 males, 36 females). Intervention(s) Participants performed 3 × 30-cm jump-landing tasks under 2 landing conditions in randomized order: (1) 50% of body height (d50%), (2) self-selected distance (dss). Main Outcome Measure(s) Mean LESS scores, proportions of individuals categorized at high (LESS: ≥ 5 errors) and low (LESS: < 5 errors) injury risk, and landing distances were compared between conditions using generalized estimating equations. Consistency of risk categorization was examined using odds ratios (ORs) and McNemar tests. McNemar and Wilcoxon signed rank tests were used to compare the occurrence of specific LESS errors. Results Participants landed closer to the box under the dss condition (difference = −23.28 [95% CI = −20.73, −25.81]%, P < .001). Group mean LESS scores (difference = −0.01 [95% CI = −0.59, 0.57] error, P = .969) and risk categorization (OR = 0.94 [95% CI = 0.47, 1.88], P = .859) were similar between conditions. However, individual-level risk categorization was inconsistent in 33% of participants, as was the occurrence of specific errors. Conclusions Using dss during the LESS might lead to different LESS errors and risk categorizations at an individual level than using d50%. Given that individual LESS scores are of primary interest in clinical and sport settings and the injury-risk threshold has not been validated for dss, we recommend use of the original LESS protocol. When only group mean LESS scores or proportions of at-risk individuals are of interest, using dss is feasible to facilitate the testing of large cohorts.

scholarly journals An Investigation of Knee Injury Profiles among Iranian Elite Karatekas: Observations from a Cross-Sectional Study

2021 ◽  
Vol 18 (13) ◽  
pp. 6888
Author(s):  
Hamidreza Naserpour ◽  
Julien S. Baker ◽  
Amir Letafatkar ◽  
Giacomo Rossettini ◽  
Frédéric Dutheil
Keyword(s):  
Knee Injury ◽  
Cruciate Ligament ◽  
Knee Injuries ◽  
Cross Sectional Study ◽  
Lower Extremity Injury ◽  
Sectional Study ◽  
Positive Health ◽  
Sports Activity ◽  
Cross Sectional ◽  
National Team

Karate training, despite the many positive health benefits, carries a risk of injury for participants. The current cross-sectional study aimed to investigate knee injury profiles among Iranian elite karatekas. Participants who attended the national team qualifiers, which included 390 male Kumite karatekas (age 24 ± 3 years old and weight 63 ± 12 kg), participated in this study. Information on knee injuries (injury history, type of injury mechanisms, and effects of knee symptoms on the ability to perform daily activities and recreational activities) were obtained using the Knee Outcome Survey (KOS). Using Pearson’s correlation coefficient, the study examined the relationships between different variables, including KOS subscales and levels of self-reported knee joint function. Our findings indicated that 287 karatekas (73.6%) experienced knee injuries. The anterior cruciate ligament (ACL) rupture (6.9%), articular cartilage (5.4%), and meniscus damage (3.8%) were the main typology of injury. In addition, there were no differences in knee injuries between the non-dominant and dominant legs. Most injuries occurred during the preparatory period (n = 162, 50%), especially during training periods. The KOS subscales scores (Mean ± Sd) for activities of daily living (ADL) and sports activity (SAS) were, respectively, 89 ± 11 and 91 ± 9. The self-reported scores for both the ADL and SAS subscales were, respectively, 89 ± 11 and 90 ± 10. Pearson coefficients of ADL and SAS subscales with their self-reported score were r = 0.761 (p < 0.0001) and r = 0.782 and (p < 0.0001), respectively. The profile of knee injuries in the current investigation is similar to previous surveys that reported lower extremity injury patterns. The findings of this study could be adopted to inform practice aimed at planning interventions for the reduction and prevention of knee injuries among karatekas.

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