| 1. |
- Peolsson, Anneli, 1967-, et al.
(författare)
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Test position and reliability in measurements of dorsal neck muscle endurance
- 2007
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Ingår i: Advances in Physiotherapy. - : Informa UK Limited. - 1403-8196 .- 1651-1948. ; 9:4, s. 181-189
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Tidskriftsartikel (refereegranskat)abstract
- The aims of the study were to compare the relative electromyographic (EMG) activity of the extensor muscles at three different locations of the spine (cervical, thoracic and lumbar) during three different dorsal neck muscle endurance test procedures, in order to determine the procedure in which the dorsal neck muscles are maximally activated in asymptomatic individuals. The reliability for one of these test procedures was evaluated using an endurance test expressed in seconds in both healthy volunteers and patients with neck discomfort. Surface EMG activity of the spinal extensor muscles was acquired in three different locations during three different test procedures: the “extended neck lift”, and “straight neck lift” with light and heavy loads in 12 healthy volunteers. The “extended neck lift” was assessed for intra-rater reliability in 30 healthy volunteers and 10 patients with neck disorders and for inter-rater reliability in another 30 healthy volunteers and nine patients with neck disorders. EMG activation of the spinal extensor muscles was generally low. Only during the “extended neck lift” was there a slight tendency that cervical extensors were more activated compared with thoracic extensors. The reliability was good (ICC 0.80–0.94); however, the maximal intra-individual differences and the measurement error were large. The different test procedures used are comparable but there was a slight tendency for “the extended neck lift” to be a more selective measurement for the cervical extensors. The “extended neck lift” is reliable and could be appropriate for evaluating groups of patients.
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| 2. |
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| 3. |
- Kvist, Joanna, 1967-, et al.
(författare)
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Changes in knee motion pattern after anterior cruciate ligament injury - A case report
- 2007
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Ingår i: Clinical Biomechanics. - : Pergamon Press. - 0268-0033 .- 1879-1271. ; 22:5, s. 551-556
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Tidskriftsartikel (refereegranskat)abstract
- Background: After an anterior cruciate ligament injury, the contra-lateral non-injured leg has been found to adapt towards the injured leg. Accordingly, in order to study changes in knee motion pattern after an anterior cruciate ligament injury, the ideal is to compare the same leg prior to and after the injury. However, this is very seldom possible. The purpose of the present study was to describe changes in static and dynamic sagittal tibial translation, electromyographic activity and muscle torque relevant to an anterior cruciate ligament tear in one patient evaluated both before and after the injury.Methods: A male soccer player was examined 11 weeks before and eight weeks after an anterior cruciate ligament injury. Sagittal tibial translation was measured with the CA-4000 electrogoniometer, statically during Lachman's test, and dynamically during isokinetic muscle testing, one-legged squat and level walking. The electromyographic activity of mm. quadriceps and hamstrings, was registered simultaneously during the one-legged squat test.Findings: Static tibial translation was increased by ∼2 mm, while dynamic tibial translation was decreased by 0.4 mm at isokinetic testing, 0.9 mm at one-legged squat and 2.4 mm during level walking compared to before the injury. Muscle torque decreased 30% and 35% for the quadriceps and the hamstrings muscle, respectively. The electromyographic activity revealed similar activation levels in quadriceps and a doubled level of activation in hamstring compared to before the injury.Interpretation: In spite of an increase in static tibial translation eight weeks after an anterior cruciate ligament injury, the tibial translation decreased during activity, thus indicating that the patient could stiffen the knee in order to protect it against increased shear forces.
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| 4. |
- Kvist, Joanna, 1967-, et al.
(författare)
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Fear of re-injury : A hindrance for returning to sports after anterior cruciate ligament reconstruction
- 2005
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Ingår i: Knee Surgery, Sports Traumatology, Arthroscopy. - : Springer Science and Business Media LLC. - 0942-2056 .- 1433-7347. ; 13:5, s. 393-397
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Tidskriftsartikel (refereegranskat)abstract
- Unrestricted participation in sports activities and return to the pre-injury level is often reported as an indicator of the success of ACL reconstruction. The athletes' choice not to return to their pre-injury level may depend on the knee function, but some times, social reasons or psychological hindrances such as fear of re-injury may influence their return to sports. The aim of this study was to investigate whether fear of re-injury due to movement is of significance for returning to previous level of activity in patients who have undergone anterior cruciate ligament reconstruction. The Tampa Scale of Kinesiophobia (TSK), the Knee Injury and Osteoarthritis Outcome Score (KOOS) and some general questions were mailed to 87 patients who underwent ACL reconstruction 3-4 years before the study was conducted. Sixty-two patients (74%) answered the questionnaires (34 men and 28 women). Fifty-three percent of the patients returned to their pre-injury activity level. The patients who did not return to their pre-injury activity level had more fear of re-injury, which was reflected in the TSK. In addition, high fear of re-injury was correlated with low knee-related quality of life. Fear of re-injury must be considered in the rehabilitation and evaluation of the effects of an ACL reconstruction. © Springer-Verlag 2005.
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| 5. |
- Kvist, Joanna, 1967-, et al.
(författare)
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Gender differences in post-exercise sagittal knee translation : A comparison between elite volleyball players and swimmers
- 2006
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Ingår i: Knee (Oxford). - : Elsevier BV. - 0968-0160 .- 1873-5800. ; 13:2, s. 132-136
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Tidskriftsartikel (refereegranskat)abstract
- Background: There is an increased risk for anterior cruciate ligament injury during the last part of a match or training session and one reason for that could be a post-exercise increase in tibial translation. Purpose: To investigate if sagittal tibial translation is affected after a workout session in volleyball or swimming in elite athletes. In addition, gender differences in sagittal tibial translation after the workout session were investigated. Method: Thirty-one elite volleyball players (16 male) and 33 elite swimmers (15 male) participated in this study. Measurements of total tibial translation were taken before and after a workout session in either volleyball or swimming with the use of a KT-1000 arthrometer. Results: Total tibial translation increased by 1.1 mm (SD 1.9) in the group consisting of both male and female volleyball players (p = 0.003) and remained unchanged in the swimmers. Male athletes increased their tibial translation with 1.8 mm (SD 1.8) and 0.6 mm (SD 1.1) in the two sports, respectively, while the tibial translation did not increase in the female athletes. Conclusion: Impact sports such as volleyball training leads to a post-exercise increase in tibial translation in male athletes. The increase in tibial translation in swimmers, that is a non-impact sport, was small and may not be clinically significant for the functional stability of the joint. It has been shown that female athletes have an increased risk for injury. Our results show no support for an increase in tibial translation being an important factor for this increased risk, and suggest that the difference between males and females in this regard should be sought elsewhere. © 2006 Elsevier B.V. All rights reserved.
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| 6. |
- Kvist, Joanna, 1967-
(författare)
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Sagittal plane knee motion in the ACL-deficient knee during body weight shift exercises on different support surfaces
- 2006
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Ingår i: Journal of Orthopaedic and Sports Physical Therapy. - : Journal of Orthopaedic & Sports Physical Therapy (JOSPT). - 0190-6011 .- 1938-1344. ; 36:12, s. 954-962
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Tidskriftsartikel (refereegranskat)abstract
- Study design: Experimental design with group comparisons. Objectives: To compare anterior tibial translation and muscle activity among different exercises for early weight-bearing and neuromuscular training in individuals with a unilateral anterior cruciate ligament (ACL) injury and in uninjured controls. Background: The effects of exercise and activity on tibial translation must be taken into consideration during rehabilitation after ACL injury. Methods and Measures: Twelve patients with an ACL-deficient knee and 12 age- and gender-matched controls participated in the study. Sagittal tibial translation and muscle activity were registered during the Lachman test (static translation) and 4 body weight shift exercises (dynamic translation). A Student t test with Bonferroni correction and analysis of variance were used for the statistical analysis. Results: Forward-backward body weight shift exercise resulted in smaller anterior tibial translation compared to body weight shift from side to side. Analysis of EMG activity could not explain this difference in anterior tibial translation. The amount of anterior tibial translation or EMG activity did not change when the exercises were performed on a trampoline compared to a firm surface. Conclusions: Forward-backward weight shifting may be preferable in initial rehabilitation after ACL injury compared to body weight shift from side to side.
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| 7. |
- Kvist, Joanna, 1967-
(författare)
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Sagittal tibial translation during exercises in the anterior cruciate ligament-deficient knee
- 2005
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Ingår i: Scandinavian Journal of Medicine and Science in Sports. - : Wiley. - 0905-7188 .- 1600-0838. ; 15:3, s. 148-158
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to describe and compare the sagittal tibial translation and electromyographic activity of muscles v. medialis and lateralis, gastrocnemius and hamstrings, during common rehabilitation exercises, in patients with anterior cruciate ligament (ACL) deficiency and non-injured controls. Sagittal tibial translation was registered with the CA-4000 electrogoniometer, in 12 patients and 17 controls, during Lachman test (static translation) and five exercises (dynamic translation). The exercises were grouped according to muscle work and joint compression (active extension, heel raises, cycling, one-legged squat and chair squat). The non-weight-bearing exercise with isolated muscle work (active extension) produced a large amount of tibial translation. During weight bearing, the total anterior-posterior tibial motion was halved compared to the non-weight-bearing exercises, but tibia was anterior positioned. Heel raising resulted in equal translation as the one-legged squat and chair squat, whereas cycling produced the smal-lest amount of tibial translation. The subjects utilized different amounts of their individual joint play (static translation) during the exercises, which may explain why there are no correlation between static translation and the patients functional outcome. These results enhance understanding on tibial translation during activity and gives indications on which exercises can be used early after ACL injury and reconstruction. Copyright © Blackwell Munksgaard 2004.
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| 8. |
- Kvist, Joanna, 1967-
(författare)
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Tibial translation in exercises used early in rehabilitation after anterior cruciate ligament reconstruction. Exercises to achieve weight-bearing
- 2006
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Ingår i: Knee (Oxford). - : Elsevier BV. - 0968-0160 .- 1873-5800. ; 13:6, s. 460-463
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Tidskriftsartikel (refereegranskat)abstract
- Accelerated rehabilitation after ACL reconstruction involves early weight-bearing. Exercises designed to achieve weight-bearing should be effective for the neuromuscular system and protect the knee from excessive anterior tibial translation. The aim of this study was to assess the anterior tibial translation under two different body-weight shift exercises at 2 weeks post-ACL reconstruction and compare this with healthy controls. Methods: Seven patients at 2 weeks after ACL reconstruction and seven controls participated in the study. Dynamic sagittal tibial translation was registered during two body weight shift exercises (from side to side and forward-backward). Results: There was no significant difference in maximal translation between the two exercises in the ACL-reconstructed group. In the control group, the body weight shift from side-to-side exercise resulted in larger anterior translation compared to the forward-backward body weight shift. Conclusions: Two weeks after ACL reconstruction, both body weight shift exercises can be used to train body weight acceptance. © 2006 Elsevier B.V. All rights reserved.
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| 9. |
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| 10. |
- Tagesson (Sonesson), Sofi, 1977-, et al.
(författare)
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Passive and dynamic translation in the knee is not influenced by knee exercises in healthy individuals
- 2005
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Ingår i: Scandinavian Journal of Medicine and Science in Sports. - : Wiley-Blackwell. - 0905-7188 .- 1600-0838. ; 15:3, s. 139-147
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Tidskriftsartikel (refereegranskat)abstract
- No evidence exists that repeated isolated quadriceps contractions lead to increased sagittal plane tibial translation. The purpose was to analyze passive and dynamic tibial translation before, during and after a specific exercise session, including cycling and a maximum number of knee extensions and heel-raises, in healthy individuals. Passive and dynamic sagittal tibial translation was measured on 18 healthy individuals (nine men and nine women) before, during and after a specific exercise session with heavy load, including cycling and maximum number of knee extensions and heel-raises. Sagittal tibial translation during the Lachman test, maximal isometric quadriceps contraction, one-legged squat and gait was registered with the CA-4000 electrogoniometer. The electromyographic (EMG) activity of m. vastus medialis and lateralis, m. gastrocnemius and mm. hamstrings was registered. There was no difference in passive or dynamic sagittal tibial translation during or after the exercise session. No difference could be detected in EMG activity during squat after compared with before the exercise session. In conclusion, the knee exercises did not influence the amount of translation in healthy individuals. The findings indicate that isolated strength training of quadriceps may be included in anterior cruciate ligament rehabilitation programs, even if further specific studies on injured individuals most be performed.
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