Level Of Sport Research Articles

Revision anterior cruciate ligament reconstruction: Return to sports at a minimum 5-year follow-up.

BACKGROUNDBetween 43% and 75% of patients who undergo primary anterior cruciate ligament (ACL) surgery return to sport activity. However, after a revision ACL reconstruction (ACLR) the rate of return to sports is variable. A few publications have reported returns to sports incidence between 56% to 100% after revision ACLR.AIMTo determine return to sports and functional outcomes after a single-stage revision ACLR with a 5-year minimum follow-up at a single institution.METHODSAll patients operated between 2010 and 2016 with a minimum 5 years of follow-up were included. Type of sport, intensity, frequency, expectation, time to return to sport and failure rate were recorded. Lysholm, Tegner and International Knee Documentation Committee forms were evaluated prior to the first ACLR surgery, at 6 mo after primary surgery and after revision ACLR at 5 years minimum of follow-up. Objective stability was tested with the knee arthrometer test (KT-1000 knee arthrometer, Medmetric Corp).RESULTSA total of 41 patients who underwent revision ACLR during that period of time were contacted and available for follow-up. Median patient age at time of revision was 29 years old [interquartile range (IQR): 24.0-36.0], and 39 (95.0%) were male. The median time from revision procedure to follow-up was 70 mo (IQR: 58.0-81.0). Regarding return to sports, 16 (39.0%) were at the same level compared to preinjury period, and 25 patients (61.0%) returned at a lower level. Sixty-three percent categorized the sport as very important and 37.0% as important. One patient (2.4%) failed with a recurrent ACL torn. Mean preoperative Lysholm and subjective International Knee Documentation Committee scores were 58.8 [standard deviation (SD) 16] and 50 (SD 11), respectively. At follow-up, mean Lysholm and subjective International Knee Documentation Committee scores were 89 (SD 8) and 82 (SD 9) (P = 0.0001). Mean Tegner score prior to primary ACLR was 6.7 (SD 1.3), 5.1 (1.5 SD) prior to revision ACLR and 5.6 (1.6 SD) at follow-up (P = 0.0002). Overall, knee arthrometer test measurement showed an average of 6 mm (IQR: 4.0-6.0) side-to-side difference of displacement prior to revision ACLR and 3mm (IQR: 1.5-4.0) after revision.CONCLUSIONAlmost 40.0% of patients returned to preinjury sports level and 60.0% to a lower level. These may be useful when counseling a patient regarding sports expectations after a revision ACLR.

Intelligent Recognition System of Sports Athletes’ Wrong Actions Based on AI+IoT

How to effectively identify errors in athletes’ movements, and then achieve the goal of correcting or eliminating them, is a problem that the sports world is currently trying to solve. Sports field is a field where sensor-based human movement recognition can play a role. Obtaining human body data through sensors can provide data basis for research on the characteristics of human movement, improvement of sports level, and technical movement analysis of sports. The main research direction of this paper is the AI+IoT joint recognition of human movements. The target human movements involved include standing, walking, running, shooting, jump shot, jumping, dribbling, walking dribbling, and running dribbling. Computer vision, as a branch of the artificial intelligence research field, uses computers to simulate human visual cognitive ability, excavate useful information from digitized images or videos without manual intervention, and strive to achieve human understanding of visual signals, and realize the ability to understand visual signals from a low level. Conversion of data input to high-level knowledge output. The system scoring module is the core functional module of the system. It extracts the angle feature of the trainer’s skeleton data, finds the corresponding frame to correspond, and prompts the trainer’s current standard degree of movement in the form of score. In terms of judgment accuracy, the accuracy of all subjects after watching the complete video is higher than the accuracy of the time blocking point, with extremely significant differences, r = -10.80, df =52, p < 0.001 . This research improves the universality of target detection and extraction in the real natural environment of the machine vision system and improves the complexity and robustness of human action recognition.

Low percentage of patients passed the ‘Back in Action’ test battery 9 months after bone-patellar tendon-bone anterior cruciate ligament reconstruction

BackgroundAnterior cruciate ligament (ACL) reconstruction is recommended in patients who intend to return to high-level sports. However, there is only a 55–80% return to pre-injury level of sports after ACL reconstruction, with a re-injury rate up to 20%. The aim of this study was to determine the percentage of patients passing the Back in Action (BIA) test 9 months after primary bone-patellar-tendon-bone (BPTB) ACL reconstruction, and evaluate the association between passing the BIA test and patient reported outcome measurements (PROMs). MethodsPatients underwent the BIA test 9 months after BPTB ACL reconstruction. In total 103 patients were included. Passing the BIA test (PASSED-group) was defined as a normal or higher score at all sub-tests with limb symmetry index (LSI) ≥90% for the dominant leg and LSI >80% for the non-dominant leg. Patients who did not meet these criteria were defined as the FAILED-group. PROMs included the International Knee Documentation Committee, Knee injury Osteoarthritis Outcome Score and Anterior Cruciate Ligament-Return to Sport after Injury. ResultsEighteen patients (17.5%) passed the BIA test 9 months after BPTB ACL reconstruction. PROMs were not statistically significant different between the PASSED- and FAILED-group. ConclusionLow percentage of patients passed the BIA test 9 months after BPTB ACL reconstruction. Although current PROMs cut-off values were met, the BIA test results show persistent functional deficits. Therefore, the BIA test could be of additional value in the decision-making process regarding return to sport (RTS). This study highlights the need for additional rehabilitation as RTS in a condition of incomplete recovery may increase the risk of re-injury. Level of evidenceII.

Sensitivity of Field Tests for Assessment of Wrestlers Specific Fitness.

The aim of this study was to determine the differences in performance, cardiac, and metabolic variables of combat-specific fitness of wrestlers from varying sports levels. The sample consisted of 61 active and highly trained adult wrestlers of national and international levels from Serbia, from both Greco-Roman and freestyle forms of wrestling, allocated into three groups: national team wrestlers (N = 15), first league competitive wrestlers (N = 20), and second league competitive wrestlers (N = 26). Participants performed two tests: a Specific Wrestling Fitness Test (SWFT) and a Specific Wrestling Performance Test (SWPT). Between-group differences were determined using multiple analysis of variance (MANOVA). Significant differences were obtained between wrestlers of different sports levels in TnThrows (F = 77.491, p < 0.001), SJFIndex (F = 49.710, p < 0.001), and SWPIndex (F = 31.205, p < 0.001) in the SWFT and in TnThrows (F = 71.051, p < 0.001), SJFIndex F = 45.343, p < 0.001), and SWPIndex (F = 26.820, p < 0.001) in the SWPT. Based on the results, it could be concluded that the SWFT and the SWPT provide very good sensitivity in the evaluation of the wrestlers specific fitness of wrestlers.

The Injury Mechanism of Knee Extensor Mechanism Rupture in Professional Athletes: A Video Analysis Study.

In Professional Athletes, quadriceps and patellar tendon ruptures are devastating injuries, often resulting in the loss of a season or a decreased return to the pre-injury level of sport. This study aimed to perform a comprehensive Video Analysis on extensor mechanism rupture (EMR) to describe the body postures and related mechanism in Professional Athletes. Using publicly available data on quadriceps tendon and patellar tendon ruptures from between 2000 and 2020, 52 elite athletes were identified. Of these, twenty-eight injuries with adequate video data were analyzed for Injury Mechanism, body posture, as well as player and sports characteristics. Of the 27 athletes included in the study, with an average age of 28.18 ± 4.96years, there were injuries in 28 extremities (1 case bilateral). The patellar tendon was ruptured in 20 cases (71.4%), and the quadriceps tendon in 8 cases (28.6%). There was total tendon rupture in 13 cases, and partial rupture in 6 cases (data for 1 case was not available). In 20 cases (70.4%), there was no contact resulting in the injury. Four of the contact injuries occurred in American football (3 direct, one indirect), 3 in basketball (1 direct, two indirect), and 1 in baseball (direct). The results of this research indicate that EMR occurs most commonly when the knee is in flexion and the ankle is in plantar flexion. There is the tendency for the knee to be in valgus at the time of injury. This information can guide physical therapy techniques, including neuromuscular training, proprioception, and balance training in the prevention of EMR in elite athletes.

Analysis of psychological variables predicting stress and sports-academic engagement in judokas.

The objective of this research was to know the relationship of the predictive variables of stress and commitment in the sports and academic context of adolescent judokas based on different personal characteristics, such as sex and sports level. Material and methods: A selective research methodology was used, with a retrospective ex-post-facto design. The sample consisted of 111 competing judokas (59 men and 52 women) aged between 11 and 19 years, all of them students of regulated secondary education. Results: In general, the sample effect size was large in variables like Sport Task Coping; medium in Sport Distancing Coping and short in Sport Emo- tion Coping. The correlational analysis between the variables of interest showed the existence of a negative relationship of stress with resilience and commitment, both in the academic and sports fields. Second, two clusters were extracted from the sample using the Ward’s method and taking into account the interval provided by the squared Euclidean distance standardized by Z scores and generating a dendrogram. The analyses carried out show the existence of two large groups of judokas with similar characteristics to each other and different from the rest. The results verified the relationship between stress variables and the commitment between the academic and sports context, therefore, the sports practice could be used as a means to improve stress coping strategies and to improve commitment in the academic field. Conclusions: Sports stress predicts academic stress, and sports stress and resilience predict academic engagement.

Assessment Of Sleep Quality By The Athlete Sleep Screening Questionnaire In Chinese Collegiate Athletes

Purpose: This study aimed to characterize sleep quality and to explore the factors that are associated with the severity of sleep difficulty among Chinese collegiate athletes. Methods: Sleep quality and associated factors were assessed by the Athlete Sleep Screening Questionnaire (ASSQ) in college athletes (n = 395, 73.6% response rate, aged 18 to 32 years, 47.6% female, 22.5% were master level, 47.6% national level and 29.9% second level in 15 different sports events). A sleep difficulty score (SDS) and level of sleep problem (0-4, none; 5-7, mild; 8-10, moderate; 11-17, severe) were used to classify participants. In addition, sports-related information such as sports events and training years were collected. Categorical variables were analyzed by Chi-squared (ꭓ2) or fisher’s exact test. An ordinal logistic regression analysis was used to explore factors with poor sleep (SDS > 8). Results: Approximately 14.2% of participants were found to have moderate to severe sleep problem (SDS > 8). When athletes travelled to participate in sports competitions, those who have experienced sleep disturbance were more diagnosed in the moderate-to-severe problem category than those without sleep disturbance (11.4% Vs. 2.8%, ꭓ2, 27.5; P < 0.001). While athletes who experienced daytime dysfunction when traveling fell more into the moderate-to-severe sleep problem category than athletes without daytime dysfunction (7.6% Vs. 6.6%, ꭓ2, 20.7; P < 0.001). No significant difference was found in SDS category between gender, sports level and sports events (All P > 0.05). Athletes with evening chronotype were more likely to report worse sleep compared to athletes with morning chronotype (OR, 2.25; 95%CI, 1.44 - 3.52; P < 0.001). For each additional year of age, there was an increase in odds ratio for poor sleep quality (OR1.15; 95% CI, 1.04 - 1.26; P = 0.004). However, increasing each additional year of training reduced the odds ratio for poor sleep quality (OR,0.95; 95% CI, 0.91 - 0.99; P = 0.044). Conclusion: To improve sleep health in collegiate athletes, chronotype, travel-related issues, age and training years should be taken into consideration in sleep counseling.

ACL Research Retreat IX March 17–19, 2022 High Point, NC

ACL Research Retreat IX March 17–19, 2022 High Point, NC

To study gender differences in athlete identity among intercollegiate level athletes

Athlete Identity is an important determinant of athletic sports performance. The aim of the study was to assess gender differences in intercollegiate athletes on the Athlete Identity. The sample comprised of 250 college’s athletes both male and female athletes competing at the collegiate, State and National level in various sports. The sample representing different sports disciplines the sample were administered the Athlete Identity Measurement Scale (AIMS). The results of the sample were analyzed using SPSS. The findings suggest that differences exist male and female athletes on Athlete Identity. The Education years of the college program the athletes are in do not reveal any significant differences between male and female athletes on their Athlete Identity. The results yield important information for coaches and trainers sportspersons.

Risk Factors Affecting Return to Sports and Patient-Reported Outcomes After Opening-Wedge High Tibial Osteotomy in Active Patients.

Background:Although opening-wedge high tibial osteotomy (OWHTO) is favored for active patients who expect to return to sports, there is still a lack of robust evidence for factors affecting their recovery.Purpose:To identify (1) risk factors leading to a decreased level of return to preoperative sports after OWHTO and (2) patient characteristics and intraoperative factors influencing patient-reported outcomes after return to sports.Study Design:Case-control study; Level of evidence, 3.Methods:Included were 69 patients who underwent OWHTO and who expected to return to their preoperative level of sports, measured as a Tegner activity level ≥2. All included patients had a minimum of 1 year of follow-up data. Logistic regression analyses were performed to assess the effect of independent variables on the level of return to preoperative sports after surgery; the independent variables were age, sex, body mass index, preoperative Tegner score, preoperative Kellgren-Lawrence grade, preoperative percentage of mechanical axis (%MA), opening gap width, concomitant meniscal treatment, postoperative %MA, postoperative medial proximal tibial angle (MPTA), and postoperative posterior tibial slope. Univariate and multiple regression analyses were performed to assess for influencing factors on postoperative International Knee Documentation Committee (IKDC) subjective scores in patients who were able to return to sports.Results:Of the 69 patients, 51 (73.9%) returned to sports after OWHTO. High preoperative Tegner scores were statistically associated with a decrease in return to sports (odds ratio, 1.494; P = .033). Multiple regression analysis (n = 46 patients) identified that a higher postoperative MPTA was associated with a decreased IKDC subjective score after return to sports (r = –0.345; P = .019).Conclusion:Higher postoperative MPTA was associated with the worsening of patient-reported outcomes among those patients who did return to their preoperative sports after OWHTO. Also, participation in high-activity sports was confirmed to be a significant risk factor for a decreased rate of return to preoperative sports. These findings can support preoperative planning and intraoperative decision making, particularly for active patients.

Return to sports after bucket handle medial meniscus tear repair using inside out technique in recreational sports players.

The main purpose of our study is to determine the outcomes of bucket handle medial meniscus tears repaired with the inside out technique in recreational sports players, and the return of these to pre-injury sports levels. 41 athletes with medial meniscus bucket handle tear were included in the study. 28 cases were associated with ACL tear while rest were isolated tears. Medial meniscus repair was done exclusively with arthroscopy assisted inside out technique. Lysholm score, IKDC score and Tegner staging were used to evaluate functional status of patients with minimum 1-year follow-up. Data was analyzed using Wilcoxon Matched pairs test, and Friedman test. All patients were examined clinically at regular intervals. Lysholm score and IKDC score showed significant increase in their values. Tegner staging showed no significant change compared to their preinjury game level. On VAS pain scale, there was significant decrease in their pain at regular follow up intervals. 2 patients had re-tears of the repaired medial meniscus. Repairing bucket handle tears of the medial meniscus in recreational sports players with the inside out technique yields good results in terms of clinical and functional outcomes. It successfully allows them to return to sports at 1 year.

Lower-Limb Muscle Activity During Aquatic Treadmill Running in Individuals With Anterior Cruciate Ligament Reconstruction

While anterior cruciate ligament (ACL) tears are commonly managed with ACL reconstruction (ACL-R), 35% of ACL-R individuals fail to return to the preinjury elite sport level. Persistent neuromuscular deficits in the hamstrings and quadriceps have been observed. It has been proposed that aquatic therapy can be used to optimize neuromuscular control after ACL-R. (1)To compare muscle activity in ACL-R individuals during aquatic treadmill (ATM) running at different water depths and (2)to compare muscle activity during ATM running between ACL-R and healthy individuals. A total of 38 participants, including 18 ACL-R individuals (mean postoperative time [SD] = 25.8 [25.0] mo) and 20 healthy individuals were recruited. Muscle activity of biceps femoris (BF), rectus femoris (RF), tibialis anterior, and medial gastrocnemius during land treadmill and ATM running at mid-shin, mid-thigh, and waist levels were recorded using surface electromyography (sEMG). The sEMG signals of the selected muscles were normalized and expressed in % Maximal Voluntary Contraction (%MVC). Muscle activity of the ACL-R, ACL-contralateral, and healthy control limbs at different water depths was compared. Among the 3 groups, the ACL-R group demonstrated the most prominent percentage increase of 101.97% (P = .001) at mid-shin level, 139.66% (P = .001) at mid-thigh level, and 141.97% (P < .001) at waist level, respectively, in %MVC when compared to land. In the ACL-R group, muscle activity of BF in the stance phase (BFSt) was significantly higher than the control group on land at all water depths. Muscle activity of RF in the swing phase (RFSw) in the ACL-R group significantly increased in all water depths immersion when compared to land, respectively. This study showed an increasing trend in muscle activity of BFSt and RFSw in ACL-R individuals during ATM running at increased water depths. ATM running could be implemented as neuromuscular training in rehabilitation after ACL-R.

Relationship of the SIRSI Score to Return to Sports After Surgical Stabilization of Glenohumeral Instability

Background: Literature is scarce regarding the influence of psychological readiness on return to sports after shoulder instability surgery. Purpose: To evaluate the predictive ability of the Shoulder Instability–Return to Sport after Injury (SIRSI) score in measuring the effect of psychological readiness on return to sports and to compare it between athletes who returned to sports and athletes who did not return to sports. Study Design: Cohort study; Level of evidence, 2. Methods: A prospective analysis was performed of patients who underwent an arthroscopic Bankart repair or a Latarjet procedure between January 2019 and September 2020. Psychological readiness to return to play was evaluated using the SIRSI instrument. Preoperative and postoperative functional outcomes were measured by the Rowe, Athletic Shoulder Outcome Scoring System, and Western Ontario Shoulder Instability Index scores. The predictive validity of the SIRSI was assessed by the use of receiver operating characteristic (ROC) curve statistics. The Youden index was calculated and used to determine a SIRSI score cutoff point that best discriminated psychological readiness to return to sports. A logistic regression analysis was performed to evaluate the effect of psychological readiness on return to sports and return to preinjury sports level. Results: A total of 104 patients were included in this study. Overall, 79% returned to sports. The SIRSI had excellent predictive ability for return-to-sport outcomes (return to sports: area under ROC curve, 0.87 [95% CI, 0.80-0.93]; return to preinjury sports level: area under ROC curve, 0.96; [95% CI, 0.8-0.9]). A cutoff level of ≥55 was used to determine whether an athlete was psychologically ready to return to sports and to return to preinjury sports level (Youden index, 0.7 and 0.9, respectively). Of those who returned to sports, 76.8% were psychologically ready to return to play, with a median SIRSI score of 65 (interquartile range, 57-80). In comparison, in the group that did not return to sports, only 4.5% achieved psychological readiness with a median SIRSI score of 38.5 (interquartile range, 35-41) (P < .001). Regression analysis for the effect of SIRSI score on return to sports was performed. For every 10-point increase in the SIRSI score, the odds of returning to sports increased by 2.9 times. Moreover, those who did not achieve their preinjury sports level showed poorer psychological readiness to return to play and SIRSI score results. Conclusion: The SIRSI was a useful tool for predicting whether patients were psychologically ready to return to sports after glenohumeral stabilization surgery. Patients who returned to sports and those who returned to their preinjury sports level were significantly more psychologically ready than those who did not return. Therefore, we believe that the SIRSI score should be considered along with other criteria that are used to decide whether the patient is ready to return to sports.

Clinical Application of Graphene Composite in Internal Fixation of Ankle Fracture in Sports

The ankle joint consists of the tibia, the fibrous lower end, and the talus. Osteoporotic fractures and deboning are common injuries in orthopaedic surgery, often due to abnormal disorders following an ankle fracture. Various fractures can occur depending on the shape, size, and position of the foot at the time of the injury. With the continuous development of science and the continuous improvement of modern sports level, scientists and sports workers worldwide recognize the importance of applying new materials in sports equipment. Composite material is a combination of multiphase combination material. In short, two or more components with different properties and different forms are used in a multimaterial combination of composite means. The organic combination of related scientific equipment and composite materials promotes the development of sports equipment and the probability of reducing sports injury. The function of the existing graphene composite is analyzed and applied, and the combination of graphene composite and sports is realized theoretically. The clinical application of graphene composite in sports is studied to promote sports development. This article mainly studies the clinical application of graphene composite in ankle fracture internal fixation in sports. It is found that with the increasingly mature application of graphene rubber composite, graphene fiber composite, and other graphene composite materials, it can be widely used in all aspects of sports equipment. Graphene composite materials can be used more easily in sports equipment. In this article, the thermal material conversion algorithm, Schrodinger equation in quantum mechanics, and the use method of graphene composite materials are used to study the clinical application of graphene composite in the internal fixation of ankle joint fracture in sports. The frequent injury and instability of ankle and knee joints are signs of ankle and knee joint injury. The main factors that affect the instability of ankle and knee function are the comprehensive effects of motion range, muscle force valgus, and body feeling, and graphene composite materials are widely used in the internal fixation of ankle joint fracture in sports. The results show that graphene composite can be used in sports equipment and has a great space and high feasibility through the analysis of four groups of sports equipment. It shows that advanced materials play a very important role in the research of sports equipment.

Comparison of Selected Characteristics of Slovak and Polish Representatives in Kickboxing.

Background: Previous kickboxing studies conducted over the last three decades have focused on improving performance through physical fitness characteristics; however, most of the research focused on men. The objective of this study is to assess the level of physical fitness of Slovak and Polish female kickboxers in the highest sport level as well as to compare the differences between them. Methods: The study included 20 female kickboxers on the highest level of sport performance, 10 from Slovakia (body mass—53.59; height—166.45) and 10 from Poland (body mass—60.35; height —169.95), from senior categories, with a mean age of 23 ± 2. The selection criteria included training experience and sports level. The level of physical fitness was evaluated by the following tests: Cooper’s test, 50 m sprint, sit-ups, flexed arm hang and standing long jump. Technical and tactical indicators were used to assess the sports skill level during the competition. Results: The test results of both groups are very comparable based on the evaluated data of Kruskal–Wallis ANOVA. The attack activity index together with sit-ups demonstrated statistically significant differences (p < 0.05) between Slovak and Polish kickboxers. A strong positive correlation was proven between technical and tactical indicators and physical fitness tests in the results of both groups. Conclusions: There exists a positive correlation between the technical and tactical indicators of kickboxers and the explosive strength of lower limbs, strength endurance, abdominal muscle strength, speed and aerobic endurance. Differences between Slovak and Polish kickboxers have been shown in the attack activity index and in the level of strength endurance. The level of speed and explosive power of the lower limbs was comparable in both groups of kickboxers.

Patients older than 55years regain sporting and recreational activities after arthroscopic anterior cruciate ligament reconstruction.

(1) To compare sporting and recreational activity levels before and at a minimum 6year follow-up, and (2) to assess the clinical and functional outcomes after anterior cruciate ligament (ACL) reconstruction in patients older than 55years. A retrospective evaluation of prospectively collected data of 150 patients with a mean age of 64 ± 4.5 (57-74) years was evaluated 8.6 ± 1.4 (6-11) years after primary ACL reconstruction using hamstring autograft. All patients were assessed using the International Knee Documentation Committee scoring system (IKDC), Knee injury and Osteoarthritis Outcome Score (KOOS), Tegner activity level, and visual analog scale (VAS) for pain. The level of recreational activities was assessed using a sport-specific questionnaire. All patients were categorized according to Isolated and Combined ACL injury groups. The data of 125 patients were analyzed at the last follow-up. While 25 patients were lost to follow-up, 117 of 125 patients were active before their injury in at least one sports discipline compared to 121 of 125 patients after ACL reconstruction. One hundred and two (82%) patients had returned to their recreational activities at the final follow-up. The mean IKDC subjective score increased from 49.5 ± 23.2 (11.5-100) to 76.2 ± 14.8 (33.3-100) (p < 0.0001). The mean KOOS sport increased significantly from 36 ± 36.2 (0-100) to 74.1 ± 25.5 (0-100) (p < 0.0001). The mean VAS score improved from 6.0 ± 2.6 (0-10) to 1.0 ± 1.4 (0-6) (p < 0.0001). There was no significant difference in the median Tegner activity level (preoperative 5 (2-8) vs. follow-up 5 (2-8) (n.s). There was no significant difference in the number of sports disciplines and duration when comparing pre-injury and mid-term follow-up activity after ACL reconstruction. High-impact activities experienced a significant decline, while a significant increase in participation in low-impact activities was recorded. The majority of patients with symptomatic instability regained their pre-injury recreational activity level with excellent clinical and functional outcomes after arthroscopic ACL reconstruction. Nevertheless, a change from high-to low-impact activities has been observed. Level IV.

Clinical outcomes and return to sport after single-stage revision anterior cruciate ligament reconstruction by bone-patellar tendon autograft combined with lateral extra-articular tenodesis

PurposeThe anterior cruciate ligament reconstruction (ACLR) failure rate continues to increase. Involvement of a young population with a desire to return to sport, explains the increased need for ACLR (revACLR) revision. The aim of this study was to evaluate clinical outcome, complications, failure rate and return to sport of a single-stage revACLR using bone patellar tendon-bone (BTBT) combined with lateral extra-articular tenodesis (LET).Material And MethodsA retrospective analysis was performed on 36 patients who underwent revACLR. Knee stability was assessed by Lachman and Pivot shift test. Objective anterior laxity was determined by KT-2000 arthrometer. The IKDC subjective, Lysholm, ACL-RSI Scores, level of sport activity and Forgotten Joint Score-12 were recorded.ResultsOf 36 patients, we collected data from 17 who underwent single-stage revACLR with autologous BTBT combined with LET, performed using an extra-articular MacIntosh procedure as modified by Arnold–Coker. The side-to-side difference in Lachman test and Pivot shift test significantly improved postoperatively. The subjective IKDC, Lysholm and ACL-RSI significantly improved from 71.4 ± 9.03 to 92 ± 6.9, from 58.3 ± 19.3 to 66.8 ± 27.7 and from 50.4 ± 12.2 to 68.6 ± 24.5, respectively during the post-operative follow-up. Ten patients (58.8%) returned to their desired level of sport. One patient was considered a failure because of the postoperative laxity.ConclusionSingle-stage revACLR with BPTB combined with LET is a safe procedure that shows good objective and subjective outcomes, and a high rate of return to the same level of sport. Reducing rotational instability and strain on intra-articular reconstructed structures results in a low rate of complications and failure.

Achieving gender equity: barriers and possibilities at board level in Swedish sport

ABSTRACT Research questions How is the ‘problem’ of gender equity described, perceived and experienced by female and male board members in Swedish sport today? What key dilemmas can be identified in the realisation of a gender equitable sport management? Research methods The article builds on research conducted on three Swedish ball sport federations during 2020–2021 and is based on a total number of 27 (12 males, 15 females) structured interviews with top leaders. The methodology employs Fraser’s concept of gender justice and the need to pay attention to cultural and economic dimensions in transformative interventions. Results and Findings Three dilemmas relating to the realisation of gender equity are analysed: between quotas and stigmatisation, overcoming gender equity as a side-project and how the democratic infrastructure of Swedish sport enables men’s continued dominance. The findings indicate that one-dimensional (affirmative) interventions dominate, which in turn explain why achieving gender equity in Swedish sport is difficult, i.e. cultural interventions only limit the chances of achieving gender equity. Implications To implement transformative interventions, cultural and economic resources need to be equally recognised and redistributed so that the organisations’ gender order is deconstructed and participation on equally recognised terms secured.

Is combined robotically assisted unicompartmental knee arthroplasty and anterior cruciate ligament reconstruction a good solution for the young arthritic knee?

Anterior cruciate ligament (ACL) deficiency can be a consequence or a cause of femoro-tibial osteoarthritis (OA). Several studies have published satisfactory outcomes of unicompartimental knee arthroplasty (UKA) and combined ACL reconstruction despite its absence classically being considered a contraindication. A major challenge in the ACL deficient knee is obtaining appropriate gap balancing and limb axis. Robotically assisted UKA allows for precise control of these factors; however, it's utilisation as a tool with combined ACL reconstruction and UKA has not been described. The purpose of this study was to evaluate the clinical and radiological outcomes of robotically assisted UKA with combined ACL reconstruction. This was a retrospective single-centre study of ten patients operated by a single surgeon from 2016 to 2020. All surgery was performed using a cemented fixed bearing UKA prosthesis (Journey uni, Smith and Nephew®) (8 medial, 2 lateral) inserted with the assistance of an image-free robotic-assisted system (BlueBelt, Navio, Smith and Nephew®). All ACL reconstructions were performed using hamstring autograft. Clinical assessment included International Knee Score (IKS) score, Tegner score and patient satisfaction. Radiological assessment was performed to assess radiolucent lines, progression of OA in the other compartments, Hip-Knee-Ankle angle and Posterior Tibial Slope. There were eight females (80%), mean age was 57 ± 7 [48-70], mean BMI was 26 ± 3 [22-31]. The mean follow-up was 45months ± 13months [24-66]. Mean post-operative IKS knee and function score were respectively 96 ± 4.5 [88-100] and 93 ± 8.2 [74-100], mean Tegner score was 4.5 ± 1.4 [3-6]. Nine patients (90%) returned to sport; one patient (10%) was dissatisfied because of residual pain preventing a return to a desired level of sport. 100% of the radiological objectives were achieved. No radiolucent lines were seen at the last follow-up. There were two re-operations (20%) for stiffness requiring arthroscopic arthrolysis at two and threemonths respectively following surgery, with full recovery of the flexion at the last follow-up in both cases. No other complications were observed. Robotic UKA associated with ACL reconstruction provides satisfactory early patient outcomes and accurate implant positioning. The first results in terms of return to sports were promising.

The Construction of Adaptive Learning for Sports Based on Aerobics Trajectory Recognition Model

Perceiving the movement track of aerobics is a key element of learning aerobics, but the current aerobics movement is not very professional, the ability to identify the movement track is weak, and improper movement in the movement process is easy to cause physical injury. In order to improve the safety of athletes in bodybuilding training, this paper uses Kinect to hold the coach’s body contour, determine the standard level of coaches’ sports, and combine the characteristics for aerobics training, so as to improve the sports level of coaches, through data acquisition, data processing, and feature extraction to assist sports learning, as well as human posture recognition. The calculation and recognition of human skeleton joints are completed by two algorithms, which improve the human motion recognition algorithm. The aerobics data collected by Kinect device is specified and digitized, which enhances the robustness of the system and improves the performance of the algorithm and the accuracy of the motion data.