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  • 1
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    Changes in subjective knee function and psychological status from preoperation to 6 months post anterior cruciate ligament reconstruction
    Springer Science and Business Media LLC ; 2022
    In:  Journal of Experimental Orthopaedics Vol. 9, No. 1 ( 2022-12-01)
    Details
    In: Journal of Experimental Orthopaedics, Springer Science and Business Media LLC, Vol. 9, No. 1 ( 2022-12-01)
    Abstract: To determine characteristic changes in subjective knee function, kinesiophobia, and psychological readiness to return to sports between scores taken before anterior cruciate ligament reconstruction (ACLR) and those taken 6 months post-ACLR. Methods Thirty-two participants (median age, 20.0 years) were included. Subjective knee function was assessed using the International Knee Documentation Committee Subjective Knee Form (IKDC-SKF). The Tampa Scale for Kinesiophobia (TSK-11) and Anterior Cruciate Ligament Return to Sport after Injury (ACL-RSI) scale were used to evaluate kinesiophobia and psychological readiness to return to sport, respectively. Questionnaires were administered 1 day before surgery and at 6 months post-ACLR. A positive change was defined as an increase in IKDC-SKF and ACL-RSI scores and a decrease in TSK-11 score. The change in each score from pre-ACLR to 6 months post-ACLR was analyzed using a paired t-test. The percentage change in scores was calculated, and the correlations of the percentage change in the TSK-11 and ACL-RSI scores and that in the IKDC-SKF score were analyzed. Results All scores differed significantly positively from pre-ACLR to 6 months post-ACLR. The proportion of participants whose scores did not change positively from pre-ACLR to 6 months post-ACLR was higher for the TSK-11 (38.0%) and ACL-RSI (38.0%) than for the IKDC-SKF (6.3%). No correlation was observed between the percentage change in the IKDC-SKF score and that in the TSK-11 or ACL-RSI scores from pre-ACLR to 6 months post-ACLR. Conclusions Changes in subjective knee function and psychological status from pre-ACLR and 6 months post-ACLR may not be interdependent.
    Type of Medium: Online Resource
    ISSN: 2197-1153
    URL: Article
    DOI: 10.1186/s40634-022-00551-2
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2780021-0
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  • 2
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    Reactive strength index during single-limb vertical continuous jumps after anterior cruciate ligament reconstruction: cross-sectional study
    Springer Science and Business Media LLC ; 2022
    In:  BMC Sports Science, Medicine and Rehabilitation Vol. 14, No. 1 ( 2022-12)
    Details
    In: BMC Sports Science, Medicine and Rehabilitation, Springer Science and Business Media LLC, Vol. 14, No. 1 ( 2022-12)
    Abstract: The association of the reactive strength index (RSI) during single-limb vertical continuous jumps (SVCJs) with single-limb hop tests in athletes after anterior cruciate ligament reconstruction (ACLR) is unclear. Thus, this study aimed to confirm the measurement properties of the RSI during SVCJs in athletes with ACLR at the phase of determining the timing of their return to sport. Methods RSI during SVCJs and single-limb hop (single, triple, and crossover) tests were measured for post-ACLR and healthy athletes. The limb symmetry index (LSI) was calculated using the measurements of each parameter. For each test, patients were divided into two subgroups according to their LSI score (≥ 90%, satisfactory;  〈  90%, unsatisfactory). Fisher’s exact test was used to examine the association of single-limb hop tests with RSI during the SVCJs. Results A total of 21 post-ACLR and 17 healthy athletes completed all the tests. RSI during SVCJs was significantly lower on the involved limb than on the uninvolved limb in post-ACLR athletes ( P   〈  0.001). The LSI of RSI during SVCJs of post-ACLR athletes was significantly lower than that of the healthy athletes ( P   〈  0.01). Among the post-ACLR athletes,  〈  30% of those with LSIs  〉  90% in the single-limb hop tests had an LSI  〉  90% of the RSI during SVCJs. Conclusions RSI during SVCJs of post-ACLR athletes was significantly lower on the involved limb than on the uninvolved limb, and the asymmetry was more remarkable in the SVCJs than in the single-limb hop tests.
    Type of Medium: Online Resource
    ISSN: 2052-1847
    URL: Article
    DOI: 10.1186/s13102-022-00542-x
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2719537-5
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  • 3
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    Association between landing biomechanics, knee pain, and kinesiophobia in athletes following anterior cruciate ligament reconstruction: A cross‐sectional study
    Wiley ; 2023
    In:  PM&R Vol. 15, No. 5 ( 2023-05), p. 552-562
    Details
    In: PM&R, Wiley, Vol. 15, No. 5 ( 2023-05), p. 552-562
    Abstract: Kinesiophobia is a fear of physical movement and activity and is known to affect return to sports and second injury after anterior cruciate ligament reconstruction. Objective To determine the association among landing biomechanics, knee pain, and kinesiophobia in athletes following anterior cruciate ligament reconstruction. Design A cross‐sectional study. Setting Clinical center of sports medicine. Participants This study included 31 athletes who participated in sports after primary, unilateral anterior cruciate ligament reconstruction (age, median [interquartile range]: 20.0 [7.0] years; body mass index: 22.2 [2.6] kg/m 2 ; time from anterior cruciate ligament reconstruction: 24.0 [23.0] months). Interventions Not applicable. Main Outcome Measures Kinesiophobia was measured using the Tampa Scale for Kinesiophobia‐11. Knee function included joint laxity, strength, and single‐leg hop distance. Knee pain intensity during sports activities was measured using a numerical rating scale. Vertical ground reaction force was measured, and electromyography data for the vastus medialis and semitendinosus muscles during single‐leg jump landing were collected. Univariate correlation analysis and multiple regression analysis were performed to identify the associations between the Tampa Scale for Kinesiophobia‐11 score and outcome measures. Results There was no correlation between peak vertical ground reaction force and Tampa Scale for Kinesiophobia‐11 score (Spearman's r  = −0.17, p  = .355). On multiple regression analyses, lower preparatory vastus medialis activity during landing (beta coefficient = −0.51, p   〈  .001) and knee pain intensity (beta coefficient = 0.57, p   〈  .001) were significantly associated with greater Tampa Scale for Kinesiophobia‐11 scores. Conclusions In athletes who have participated in sports following anterior cruciate ligament reconstruction, lower preparatory vastus medialis activity during landing and knee pain intensity are associated with greater kinesiophobia. These findings indicate that interventions to address the landing muscle activity pattern and pain control should be performed to decrease kinesiophobia after anterior cruciate ligament reconstruction.
    Type of Medium: Online Resource
    ISSN: 1934-1482 , 1934-1563
    URL: Issue
    URL: Article
    DOI: 10.1002/pmrj.v15.5
    DOI: 10.1002/pmrj.12827
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2480906-8
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  • 4
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    Association Between Knee Extension Strength at 3 and 6 Months After Anterior Cruciate Ligament Reconstruction
    Human Kinetics ; 2023
    In:  Journal of Sport Rehabilitation Vol. 32, No. 1 ( 2023-01-1), p. 76-84
    Details
    In: Journal of Sport Rehabilitation, Human Kinetics, Vol. 32, No. 1 ( 2023-01-1), p. 76-84
    Abstract: Context : Deficits in knee extension strength after anterior cruciate ligament reconstruction have been a major problem. The inadequate recovery of the knee extension strength of surgical limb reportedly delays return to sports and increases reinjury risk. Accordingly, the early detection of knee extension strength deficits after reconstruction may help plan early interventions to manage impairment. This study aimed to clarify the association between knee extension strength at 3 and 6 months after anterior cruciate ligament reconstruction. Design : Retrospective study. Methods : Fifty patients who underwent primary anterior cruciate ligament reconstruction using hamstring grafts were included. At 3 months postoperatively, the limb symmetry index (LSI) of isokinetic knee extension strength (IKE) at 60°/s, degree of swelling, passive range of motion of knee flexion and extension, and anterior leg reach distance were measured. At 6 months postoperatively, the LSI of IKE was measured at 60°/s, which was used as the main outcome. A correlation analysis was performed with the LSI of IKE at 6 months postoperatively as the dependent variable and the LSI of IKE at 3 months postoperatively as the independent variable. Subsequently, a multiple regression analysis was performed, with LSI of IKE at 6 months postoperatively as the dependent variable; LSI of IKE at 3 months postoperatively as the independent variable; and other variables, demographic information, and surgical data as covariates. Results : The correlation analysis revealed that the LSIs of IKE at 3 and 6 months postoperatively were correlated ( r  = .535, P   〈  .001). In the multiple regression analysis, the LSI of IKE at 3 months postoperatively was significantly associated with that at 6 months postoperatively, even when other variables were included as covariates ( R 2  = .349, P  = .004). Conclusion : Asymmetry of knee extension strength at 3 months postoperatively could be more useful than other variables related to knee strength in predicting the asymmetry of knee extension strength at 6 months postoperatively.
    Type of Medium: Online Resource
    ISSN: 1056-6716 , 1543-3072
    URL: Article
    DOI: 10.1123/jsr.2021-0336
    Language: Unknown
    Publisher: Human Kinetics
    Publication Date: 2023
    SSG: 31
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  • 5
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    Athletic identity and sport commitment in athletes after anterior cruciate ligament reconstruction who have returned to sports at their pre-injury level of competition
    Springer Science and Business Media LLC ; 2021
    In:  BMC Sports Science, Medicine and Rehabilitation Vol. 13, No. 1 ( 2021-12)
    Details
    In: BMC Sports Science, Medicine and Rehabilitation, Springer Science and Business Media LLC, Vol. 13, No. 1 ( 2021-12)
    Abstract: This study aimed to determine the relationships between athletic identity and sport commitment and return to sports (RTS) status in athletes after anterior cruciate ligament reconstruction (ACLR). Methods Thirty-nine participants post-ACLR (8–24 months) were included in this cross-sectional study. Measures included the athletic identity measurement scale and sport commitment scale. In addition, we measured kinesiophobia and psychological readiness using the Tampa Scale for Kinesiophobia and ACL-Return to sport after injury scale. The subjects were categorized into Yes-RTS or No-RTS based on two questions to determine whether they were returning to sport at the same level of competition as before the injury. A Chi-squared test, Fisher’s exact test, unpaired t-test, and Mann-Whitney’s U test were used to analyze the data. Results The Yes-RTS group had significantly higher scores on the athletic identity measurement scale ( P  = 0.023, effect size [ES] = − 0.36), sport commitment scale ( P  = 0.027, ES = − 0.35), and ACL-Return to sport after injury scale ( P  = 0.002, ES = − 0.50) and significantly lower Tampa Scale for Kinesiophobia scores ( P  = 0.014, ES = − 0.39) compared to the No-RTS group. Conclusion Athletes who returned to sports at the same level of competition as before the injury had higher athletic identity and sport commitment and lower kinesiophobia compared to those who did not return to sports at the same level of competition. These self-beliefs regarding sport may play an important role in post-ACLR athletes’ RTS.
    Type of Medium: Online Resource
    ISSN: 2052-1847
    URL: Article
    DOI: 10.1186/s13102-021-00264-6
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2021
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  • 6
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    Cross-sectional study on relationships between physical function and psychological readiness to return to sport after anterior cruciate ligament reconstruction
    Springer Science and Business Media LLC ; 2022
    In:  BMC Sports Science, Medicine and Rehabilitation Vol. 14, No. 1 ( 2022-12)
    Details
    In: BMC Sports Science, Medicine and Rehabilitation, Springer Science and Business Media LLC, Vol. 14, No. 1 ( 2022-12)
    Abstract: Information about specific factors of physical function that contribute to psychological readiness is needed to plan rehabilitation for a return to sports. The purpose of this study was to identify specific physical functions related to the psychological readiness of patients aiming to return to sports 6 months after reconstruction. We hypothesized that the knee strength is a factor related to the Anterior Cruciate Ligament–Return to Sport after Injury scale (ACL-RSI) cutoff score for a return to sports. Methods This was a cross-sectional study. Fifty-four patients who had undergone primary reconstruction using hamstring tendon participated in this study. Psychological readiness was measured using the ACL-RSI in patients at 6 months after reconstruction. To identify specific physical functions related to the ACL-RSI score, participants were divided into groups with ACL-RSI scores of ≥ 60 or  〈  60. Non-paired t -tests or the Mann–Whitney test were performed to analyze group differences in objective variables in physical function: (1) knee strength in both legs; (2) leg anterior reach distance on both sides; and (3) single-leg hop (SLH) distances in three directions for both legs. Results Significant differences between groups were identified in knee flexion strength (60°/s) for the uninvolved limb, hamstring-to-quadriceps ratio (60°/s) for the uninvolved limb, knee flexion strength (180°/s) for the involved limb, limb symmetry index (LSI) of leg anterior reach distance, the ratio of the distance to the height of the patient and LSI of SLH distances in lateral and medial directions. Conclusion This study revealed that at 6 months after reconstruction, increased knee flexion strength (ratio of peak torque measured to body mass of the patient), hamstring-to-quadriceps ratio, leg anterior reach distance LSI, and lateral and medial SLH appear important to exceed the ACL-RSI cutoff for a return to sports. The present results may be useful for planning post-operative rehabilitation for long-term return to sports after reconstruction.
    Type of Medium: Online Resource
    ISSN: 2052-1847
    URL: Article
    DOI: 10.1186/s13102-022-00491-5
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
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  • 7
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    The psychological readiness to return to sports of patients with anterior cruciate ligament reconstruction preoperatively and 6 months postoperatively
    Elsevier BV ; 2021
    In:  Physical Therapy in Sport Vol. 50 ( 2021-07), p. 114-120
    Details
    In: Physical Therapy in Sport, Elsevier BV, Vol. 50 ( 2021-07), p. 114-120
    Type of Medium: Online Resource
    ISSN: 1466-853X
    URL: Article
    DOI: 10.1016/j.ptsp.2021.04.009
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2021
    detail.hit.zdb_id: 2007802-X
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  • 8
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    Single-leg hop can result in higher limb symmetry index than isokinetic strength and single-leg vertical jump following anterior cruciate ligament reconstruction
    Elsevier BV ; 2021
    In:  The Knee Vol. 29 ( 2021-03), p. 160-166
    Details
    In: The Knee, Elsevier BV, Vol. 29 ( 2021-03), p. 160-166
    Type of Medium: Online Resource
    ISSN: 0968-0160
    URL: Article
    DOI: 10.1016/j.knee.2021.01.030
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2021
    detail.hit.zdb_id: 2008020-7
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  • 9
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    Factors Associated With Psychological Readiness to Return to Sports With Cutting, Pivoting, and Jump-Landings After Primary ACL Reconstruction
    SAGE Publications ; 2020
    In:  Orthopaedic Journal of Sports Medicine Vol. 8, No. 11 ( 2020-11-01), p. 232596712096448-
    Details
    In: Orthopaedic Journal of Sports Medicine, SAGE Publications, Vol. 8, No. 11 ( 2020-11-01), p. 232596712096448-
    Abstract: High psychological readiness is an important element for returning to sports after anterior cruciate ligament (ACL) reconstruction. Identifying factors that contribute to psychological readiness is essential for planning interventions to return to play. No studies have used multivariate analysis to clarify factors associated with psychological readiness to return to specific sports. Hypothesis: To identify factors that contribute to an athlete’s psychological readiness to return after ACL reconstruction to sports that require cutting, pivoting, and jump-landings. Study Design: Cross-sectional study; Level of evidence, 3. Methods: Study participants were athletes who before injury had participated in sports with limited contact that required cutting, pivoting, and jump-landings (basketball, soccer, futsal, volleyball, badminton, tennis, and frisbee) and hoped to return to the same sport after reconstruction. Psychological readiness was measured using the Anterior Cruciate Ligament–Return to Sport After Injury Scale (ACL-RSI) in athletes more than 6 months after primary ACL reconstruction. To clarify factors associated with the ACL-RSI, univariate regression analysis and multivariate regression analysis were performed using the following independent variables: age, sex, body mass index, time from injury to reconstruction, time from reconstruction to testing, meniscal surgery, modified Tegner activity scale before injury, kinesiophobia, limb symmetry index of knee strength, limb symmetry indices of single-leg hop (SLH) distances, and subjective running ability. Results: Higher subjective running ability, a lower kinesiophobia score, and greater limb symmetry in the lateral SLH were positively associated with psychological readiness. Conclusion: The psychological readiness of athletes aiming to return after ACL reconstruction to limited-contact sports that require cutting, pivoting, and jump-landings was affected by subjective running ability, kinesiophobia, and asymmetry of lateral SLH distance. This information may be useful in planning appropriate interventions and thereby increasing the likelihood of an athlete’s returning to such sports.
    Type of Medium: Online Resource
    ISSN: 2325-9671 , 2325-9671
    URL: Article
    DOI: 10.1177/2325967120964484
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2020
    detail.hit.zdb_id: 2706251-X
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  • 10
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    Correlations between isokinetic knee torques and single-leg hop distances in three directions in patients after ACL reconstruction
    Springer Science and Business Media LLC ; 2021
    In:  BMC Sports Science, Medicine and Rehabilitation Vol. 13, No. 1 ( 2021-12)
    Details
    In: BMC Sports Science, Medicine and Rehabilitation, Springer Science and Business Media LLC, Vol. 13, No. 1 ( 2021-12)
    Abstract: When planning rehabilitation and conditioning for performance enhancement and a return to sports after anterior cruciate ligament reconstruction, identifying the elements of physical function associated with single-leg hop is important. The purpose of this study was to clarify the relationship between single-leg hop distances in three directions and knee extensor and flexor strengths at 6 months after reconstruction. Methods Participants were 47 patients taking part in training sessions for sports involving cutting, pivoting, and jump-landing 6 months after reconstruction using a hamstring tendon. Single-leg hop distances in 3 directions (anterior, lateral, and medial) and isokinetic concentric strengths of knee extension and flexion were assessed at an angular velocity of 60°/s and 180°/s. Simple regression analyses using Spearman’s rank correlation coefficient were performed to assess relationships between single-leg hop distances and knee strengths. Results In the involved limb, correlations between single-leg hop distances in 3 directions and knee strengths were significant ( P 〈 0.01) and correlation coefficients ranged from 0.48 to 0.65. Correlation coefficients between all single-leg hop parameters and knee extension/flexion strengths at an angular velocity of 180°/s were greater than those of 60°/s. Conclusions In this cross-sectional study of patients who participated in sports training sessions that required jump-landings and cutting approximately 6 months after reconstruction using hamstring grafts, isokinetic knee flexor, and extensor torques were moderately to strongly associated with single-leg hop distances in lateral, medial, and anterior directions. Given these relationships, assessments and exercises for knee strength and single-leg hop distances should be planned.
    Type of Medium: Online Resource
    ISSN: 2052-1847
    URL: Article
    DOI: 10.1186/s13102-021-00265-5
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2021
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