TY - GEN A1 - Prill, Robert A1 - Becker, Roland A1 - Schulz, Robert A1 - Michel, Sven A1 - Hommel, Hagen T1 - No correlation between symmetry based performance measures and patient related outcome prior to and after total knee arthroplasty T2 - Knee surgery, sports traumatology, arthroscopy N2 - Standardized outcome measures are crucial for the evaluation of different treatment and rehabilitation regimes in patients after total knee arthroplasty (TKA). Performance-based measures are necessary to capture different aspects of physical function. High reliability and agreement of five performance-based measures were hypothesized to differentiate between measurement error and change in test performance. Secondary outcomes are the correlation of performance-based measurements to KSS and WOMAC prior to surgery (baseline) and 10 weeks thereafter (t3). Methods The test–retest reliabilities and agreements of the 1-m walk test, the stair-climbing test, the timed-up-and-go test, the weight-balanced-chair-rising test and the isometric maximum knee extension force in patients undergoing total knee replacements were studied. The intraclass correlation coefficient was calculated and a Bland–Altman analysis performed. The weight-balanced-chair-rising test showed a symmetry at baseline = 0.77, 5 ± 1 days after surgery (t1) = 0.50, 9 ± 1 days (t2)= 0.59 and (t3)= 0.80. All performance tests showed high intraclass correlation coefficients (ICC= 0.81–0.99). The 10-m walk test, stair climbing test, and the timed-up-and-go test showed high agreement in the Bland–Altman analysis. The Bland–Altman analysis for the weight-balanced-chair-rising test and isometric knee extension force indicated high agreement at 5 and 9 days postoperatively, but the relative measurement error increased pre- and 10 weeks postoperatively. In conclusion, symmetry, as an important outcome after TKA, is a reliable and rather unique item that should unquestionably be added to established measurements like walking tests or survey-based function assessment. The implementation of standardized performance-based measures to assess physical function in rehabilitation procedures will help to improve the more objectively based assessment of different rehabilitation protocols. KW - Osteoarthritis KW - Outcome assessment KW - Functional tests KW - Total knee replacement KW - Total knee arthroplasty KW - Outcome set Y1 - 2021 U6 - https://doi.org/10.1007/s00167-021-06570-3 SN - 1433-7347 VL - Vol. 30 (2022) IS - 9 SP - 3155 EP - 3161 ER - TY - GEN A1 - Prill, Robert A1 - Schulz, Robert A1 - Kirschner, Jana A1 - Michel, Sven A1 - Becker, Roland A1 - Hommel, Hagen T1 - Reliability, feasibility and performance development of the weight balanced chair rising test in patients before and after total knee arthroplasty T2 - World Physiotherapy Congress 2021 N2 - Knee osteoarthritis is the most prevalent joint disease worldwide and total knee arthroplasty (TKA) is often the only evidence-based treatment option left for patients with endstage osteoarthritis. The postoperative outcomes as well as the different rehabilitation procedures are most commonly evaluated by patient-reported outcome measurements (PROMs). However, in acute clinical-stage stages, performance-based measures were shown to yield greater responsiveness than PROMs, which failed to capture functional declines and may overestimate long-term functional improvements. Moreover, these tests represent a variety of daily life activities which helps to estimate whether a patient is functioning adequately prior to discharge from hospital and in the following rehabilitation. The ability to rise from a sitting position is one of those activities which is important for an elderly person to maintain an independent life. Also, it was shown that chair rising test performance is highly correlated with deviations in gait patterns. However, there is no data available yet if this test can be used at perioperative time-points in patients undergoing TKA and how reliable this test is. Therefore, this study investigates the reliability and the minimal detectable change and the development of the performance of the weight-balanced chair rising test in patients before and after TKA. This study was designed as a test-retest reliability study. Participants were recruited in an orthopedic hospital after they were scheduled for total knee arthroplasty. The participants performed two chair rising tests (five-times-sit-to-stand) on a ground reaction force plate at one-day preoperatively (M0), five days- (M1), ten days (M2)- and ten weeks postoperatively (M3). The test-retest reliability of the weight balanced asymmetry measured as ground reaction force in Newton was analyzed for each of the four time-points. Therefore, the minimal detectable change within a confidence interval of 95% (MDC95) and the ICC were calculated. 16 male and 8 female subjects (N=24) with a mean age of age 63,93 (±9,59) were included. The mean side-to-side difference in N was 138(±104) at M0, 319(±125) at M1, 254(±109) at M2 and 116(±74) at M3. The test-retest reliability ranged between ICC=.84-.96 at all four time points, indicating good to excellent reliability. The MDC95 ranges from 79–113 N. No adverse events were recorded after the performance of the test and no participants dropped out because of study-related reasons. The weight-balanced chair rising test shows good- to excellent reliability. After an initial decrease of loading symmetry at M1 and M2 preoperative levels are reached as early as at M3. The weight-balanced chair rising test provides objective data about loading symmetry during an activity of daily living. It is reliable and feasible to use in as well in-patient as out- patient rehabilitation of patients with TKA. Y1 - 2021 UR - https://www.researchgate.net/publication/350759868_PL-01055_RELIABILITY_FEASIBILITY_AND_PERFORMANCE_DEVELOPMENT_OF_THE_WEIGHT_BALANCED_CHAIR_RISING_TEST_IN_PATIENTS_BEFORE_AND_AFTER_TOTAL_KNEE_ARTHROPLASTY ER - TY - GEN A1 - Prill, Robert A1 - Schulz, Robert A1 - Michel, Sven A1 - Becker, Roland T1 - P20-1308 Lower limb strength and power in competitive Judokas five years after ACLR Y1 - 2021 UR - https://www.researchgate.net/publication/351479254_P20-1308_Lower_limb_strength_and_power_in_competitive_Judokas_five_years_after_ACLR ER - TY - GEN A1 - Kirschner, Jana A1 - Michel, Sven A1 - Becker, Roland A1 - Stiebitz, Olaf A1 - Hommel, Hagen A1 - Schulz, Robert A1 - Daszkiewicz, Maciej A1 - Krolikowska, Aleksandra A1 - Prill, Robert T1 - Determination of Relationships between Symmetry-Based, Performance-Based, and Functional Outcome Measures in Patients Undergoing Total Hip Arthroplasty T2 - Journal of Personalized Medicine N2 - Due to the high heterogeneity in outcome measures after total hip arthroplasty (THA), the prospective observational study investigated the relationships between symmetry-based (SBMs), performance-based (PBMs), and functional outcome measures in THA patients to determine necessary or redundant categories of tests. The study material consisted of 24 patients with end-stage hip osteoarthritis scheduled for THA. The patients were examined one day before surgery and consecutively on the 4th day, 9th day, and 10th week postoperatively using the SBMs (weight-bearing chair-rising test, measurements of the maximal isometric torque of the quadriceps muscle); the PBMs (10-m walk, timed up-and-go, and stair-climbing tests); and the functional outcome measure (Harris Hip Score). The results obtained in a given category of tests at different time points were compared, and the correlations between the tests were determined. The reliability of the outcome measures was determined. The results of tests in the studied categories statistically significantly (p < 0.05) improved at the 10th week postoperatively compared to preoperative results. No strong correlations were revealed between the three studied types of outcome measures in THA patients. Therefore, none of them can be considered redundant. It also means that the relevance of symmetry for a core measurement set to describe the domain function in THA patients must be further clarified. Y1 - 2023 U6 - https://doi.org/10.3390/jpm13071046 SN - 2075-4426 VL - 13 IS - 7 ER - TY - GEN A1 - Prill, Robert A1 - Krolikowska, Aleksandra A1 - Schulz, Robert A1 - Oleksy, Lukasz A1 - Michel, Sven A1 - Becker, Roland T1 - Verletzungen im Judo – Risikosportart oder Risikosportler? T2 - Sports Orthopaedics and Traumatology Y1 - 2023 U6 - https://doi.org/10.1016/j.orthtr.2023.03.008 SN - 0949-328X VL - 2 IS - 39 SP - 185 PB - Elsevier CY - Amsterdam ER - TY - GEN A1 - Prill, Robert A1 - Becker, Roland A1 - Michel, Sven T1 - Kraftindex deutet bei Judoka 5 Jahre nach Kreuzbandruptur auf Muskelfaserspektrumsänderung hin T2 - Sports Orthopaedics and Traumatology Y1 - 2022 U6 - https://doi.org/10.1016/j.orthtr.2022.02.025 SN - 1876-4339 VL - 38 IS - 2 SP - 198 EP - 199 ER - TY - GEN A1 - Jahnke, Sonja A1 - Cruysen, Caren A1 - Prill, Robert A1 - Kittmann, Fabian A1 - Pflug, Nicola A1 - Albert, Justin Amadeus A1 - Camargo, Tibor de A1 - Arnrich, Bert A1 - Krolikowska, Aleksandra A1 - Kolcz, Anna A1 - Reichert, Pawel A1 - Oleksy, Lukasz A1 - Michel, Sven A1 - Kopf, Sebastian A1 - Wagner, Michael A1 - Scheffler, Sven A1 - Becker, Roland T1 - Protocol for a Randomized Crossover Trial to Evaluate the Effect of Soft Brace and Rigid Orthosis on Performance and Readiness to Return to Sport Six Months Post‑ACL‑Reconstruction T2 - Healthcare N2 - A randomized crossover trial was designed to investigate the influence of muscle activation and strength on functional stability/control of the knee joint, to determine whether bilateral imbalances still occur six months after successful anterior cruciate ligament reconstruction (ACLR), and to analyze whether the use of orthotic devices changes the activity onset of these muscles. Furthermore, conclusions on the feedforward and feedback mechanisms are highlighted. Therefore, twenty‑eight patients will take part in a modified Back in Action (BIA) test battery at an average of six months after a primary unilateral ACLR, which used an autologous ipsilateral semitendinosus tendon graft. This includes double‑leg and single‑leg stability tests, double‑leg and single‑leg countermovement jumps, double‑leg and single‑leg drop jumps, a speedy jump test, and a quick feet test. During the tests, gluteus medius and semitendinosus muscle activity are analyzed using surface electromyography (sEMG). Motion analysis is conducted using Microsoft Azure DK and 3D force plates. The tests are performed while wearing knee rigid orthosis, soft brace, and with no aid, in random order. Additionally, the range of hip and knee motion and hip abductor muscle strength under isometric conditions are measured. Furthermore, patient‑rated outcomes will be assessed. Y1 - 2023 U6 - https://doi.org/10.3390/healthcare11040513 SN - 2227-9032 VL - 11 IS - 4 ER - TY - GEN A1 - Jahnke, Sonja A1 - Prill, Robert A1 - Królikowska, Aleksandra A1 - Oleksy, Łukasz A1 - Cruysen, Caren A1 - Daszkiewicz, Maciej A1 - Kowal, Mateusz A1 - Kentel, Monika A1 - Kentel, Maciej A1 - Michel, Sven A1 - Reichert, Paweł A1 - Becker, Roland T1 - Test learning effects influence coordinative but not strength-related tasks in patients six months after anterior cruciate ligament reconstruction T2 - Journal of clinical medicine N2 - Background: A comprehensive rehabilitation program is recommended following anterior cruciate ligament reconstruction (ACLR) to restore function, strength and lower limb stability. Despite advancements in surgical techniques, high reinjury rates highlight the need to refine rehabilitation strategies. This study investigates performance across various physically demanding tasks and compares outcomes between the injured and uninjured leg, using a modified Back in Action (BIA) test battery. It is hypothesized that due to test learning effects patients exhibit faster improvement in coordinatively demanding tasks compared to strength-related tasks. Methods: Thirty-two patients (aged 18–40) following primary unilateral ACLR participated in a prospective cross-sectional study within the context of a larger trial. Participants completed a modified BIA test battery, including stability, countermovement jump (CMJ), drop landing, speedy jumps, and quick-feet test (QFT). Each test was conducted in three sets, with three immediate repetitions. Self-reported outcomes were also collected. Results: Patients showed significant within-session improvements in coordinative tasks, with 32% in the injured and 26% in the uninjured limb during the speedy jumps [p < 0.05]. No significant learning effects were observed in strength-related tasks (drop landing, stability test, CMJ). Patients with lower baseline performance exhibited greater improvement than patients with higher performance level from baseline. Furthermore, a correlation between self-assessed abilities and actual performance was identified. Conclusions: This study showed that improvement of coordinative tasks after Return to Sport (RTS) testing of ACLR patients are rather affected by test learning effects. In contrast, this phenomenon is not seen in strength-related tasks. Rehabilitation programs should integrate both types of exercises while considering individual baseline abilities. Tailoring rehabilitation to individual needs, establishing sport-specific rehabilitation programs and incorporating self-assessment tools can enhance patient-centered care and reduce reinjury risks. KW - Anterior cruciate ligament reconstruction (ACLR) KW - Return to Sport (RTS) KW - Back in Action (BIA) KW - Coordination KW - Neuromuscular adaption KW - Kinematics Y1 - 2025 U6 - https://doi.org/10.3390/jcm14176308 SN - 2077-0383 VL - 14 IS - 17 SP - 1 EP - 14 PB - MDPI CY - Basel ER -