Showing 5 results for Isokinetic
Hadian Mr, Otadi K, Oliaei Gr, Talebian Moghaddam S ,
Volume 60, Issue 3 (6-2002)
Abstract
Introduction: It is suggested that quadriceps muscle has an important role in stability & mobility of Knee joint in athletics and normal individuals therefore, the purpose of this study was evaluation of the strength in Power Athletics (PA) and Normal Un-trained Individuals (NUI) groups.
Methods and Materials: 31 Females (20 NUI & 11 PA) participated in this study. For measuring the strength, each individual performed 5 continuous concentric-eccentric maximal contraction at angular velocities of 90°/s, 135°/s. Twenty five percent of each individual (Maximum Voluntary Isometric Contraction) MVIC was determined and used as Pre-load force.
Results: Averages concentric & eccentric torques were greater in PA group in comparison with NUI group. The significant difference (P<0.02) existed between PA and NUI groups. Average concentric torques of quadriceps muscle decreased (with increasing of speed from 90°/s to 135°/s) and average eccentric torques increased. Average eccentric torques were greater (P<0.01) in PA & NUI groups in comparison with average concentric torques.
Conclusion: PA group strength was greater in comparison with NUI group. This is possibly due to the type of muscle fibers in this group have (greater type II fibers). Accordingly, it is critical to consider the role of eccentric exercise in PA group for preventing sport injury.
Talebian S, Bahrami Sh, Olyaei Gr, Bagheri H, Hadian Mr,
Volume 64, Issue 7 (8-2006)
Abstract
Background: The purpose of this study was to measure isokinetic maximum and average peak torque of internal and external rotators of glenohumeral joint in volley ball and tennis players
Methods: This study was performed on 17 professional female athletes
(7 tennis players &10 volleyball players) with age ranged 18-28 years. The subjects had played in a skilled team for more than 3 years. They were free from injury to their dominant shoulder in the past year. Subjects performed a five minute warm up by shoulder wheel and Maximum average Peak Torque (APT) were obtained unilaterally by a Biodex System 3 with the arm of players in 90 degree abduction at 120,180 & 210 o/s. Players performed five trails of concentric movements with 30 second rest between them.
Results: Maximum and average of maximum torques of shoulder rotator, in both groups, expect for internal rotators of tennis players, reduced by increase of movement speed (P<0.05). There are not significant difference between two groups in maximum, average of maximum torques and normalized data (ratio of maximum torque to weight). There is significant difference between two groups in percentage of APT of External rotator / Internal rotator ratio at 210 o/s (P<0.05).
Conclusion: Volleyball and tennis have no effect on isokinetic strength of shoulder rotators. In high speed, ratio of External rotator / Internal rotator is reduced. This indicates that increase in movement speed increase internal rotator in comparison to external rotator in these professional female athletes.
Olyaei G.r, Jamshidi A.a, Heydarian K, Talebian S,
Volume 65, Issue 2 (3-2008)
Abstract
Background: Both isokinetic testing and functional tests are commonly used to evaluate anterior cruciate ligament reconstructed (ACLR) patients. The object of this study was to evaluate motor performance of the knee and determine the relationship of isokinetic test scores to scores on a variety of lower extremity functional tests.
Methods: Ten healthy subjects and eleven ACLR patients at least six months after surgery performed the following: knee isokinetic tests at 60 and 180 deg/sec three functional tests including leg vertical jump, single hop, and triple cross-over hop for distance. The International Knee Document Committee Subjective Knee Evaluation Form (IKDCSKEF) was used to score the self-assessment of each study participant. Paired T-test was used to compare the involved and uninvolved knee. Pearson correlation coefficients were used to determine the relationship between the scores on the isokinetic test and functional tests. Significance was determined by P<0.05.
Results: IKDCSKEF score was significantly lower in patients than control subjects. Quadriceps peak torque and functional test scores were significantly lower in the involved knee of the ACLR subjects compared to the uninvolved knee. Correlation coefficients of isokinetic peak torque to body weight and functional testing were not significant in patients or control subjects, whi1e the limb symmetry index (LSI) of the quadriceps isokinetics peak torque to body weight and the LSI of the functional tests were significant (r = 0.54 to 0.97).
Conclusion: These results indicate a significant relationship between the LSI of various functional tests and the LSI of isokinetic testing among ACLR patients. Thus, in situations where an isokinetic dynamometer is not available, the LSI of functional tests can be used to estimate quadriceps deficiency for ACLR patients.
Meshkani Z.s, Sedaghat M, Afshin A,
Volume 65, Issue 14 (3-2008)
Abstract
Background: Surgery operations are the fearful events among all other medical procedures.
This fear causes anxiety and stress which affects the outcome of treatments, recovery from
surgery and some maladaptive behaviors. To cope with surgery worries and minimize the
fear, it is important to study these fears and its associated factors. This study attempts to
explore the surgery worries and the associated factors among Iranian high school adolescents.
Methods: To measure surgery worries, high school adolescents of age 11-15 completed the
Child Worries Questionnaire (CPCI) adolescent form, and also answered the questions about
the 14 independent variables (sex, age, parents education and occupation, previous
hospitalization experience of child and immediate family and friends, number of
hospitalization during Child’s life long, previous surgery experience of child and her or his
immediate families, death of close friends in hospital). Multivariate regression method was
used for statistical analysis to determine the effective factors.
Results: The results of this study showed that the Iranian Adolescents have most worries
about the “Not being able to do the same things as before” and least worries about “What I
will feel during the anesthesia”. The factors associated with Surgery worries are parent’s
education (P=.021 for father and 0.049 for mother), adolescent previous experience and
number of hospitalizations (P=0.025 and P=0.008, respectively), the number of previous
hospitalizations (P=.003), previous experience of hospitalization of immediate family and
friends (P=0.035). The findings of this study have implications for parents, family, hospitals’
staff and care given.
Conclusions: It seems, according to the findings of this study, there should be a special
educational program for children who are going to be operated in a hospital ward to reduce
their worriships.
Mostafa Mohammadi , Nastaran Ghotbi , Seyed Mohsen Mir , Kazem Malmir ,
Volume 76, Issue 1 (4-2018)
Abstract
Background: Sports injuries of the knee joint are very common. There are both contact injuries and non-contact injuries. Contractile injuries may be due to an impairment of the knee joint position sense or a decrease of the quadriceps muscle strength. Using a Kinesio taping method may decrease this impairment. The aim of the current study was to assess the effect of direction and tension of Kinesio taping of the quadriceps muscle on repositioning sense of the knee joint and maximum concentric and eccentric torque of the knee extensors.
Methods: Twenty-one recreationally active healthy males, determined by convenient non-probability sampling method, participated in this quazi-experimental study. The tests were performed in biomechanics laboratory of School of Rehabilitation of Tehran University of Medical Sciences, Iran, between July to November 2017. They visited biomechanics laboratory 5 sessions. The first session was for familiarization with the main tests and signing an informed consent form. For 2 through 5 sessions, one of each Kinesio tape tension approaches of 100, 115 and 140 percent (origin to insertion direction) and 100 percent (insertion to origin direction) was randomly applied on the quadriceps muscle. Active and passive repositioning sense of the knee joint at 60-degree flexion and maximum concentric and eccentric torque of the knee extensors of the dominant extremity before and after Kinesio taping were measured using a Biodex System 3 isokinetic dynamometer (Biodex Medical Systems, Shirley, NY, USA). Order of measuring active and passive repositioning sense and maximum concentric and eccentric torque of the knee extensors were randomly selected.
Results: Origin to insertion Kinesio taping method with tension of 100, 115 and 140 percent significantly decreased means of active and passive repositioning sense errors (P< 0.05) and changed means of maximum concentric and eccentric torque of the quadriceps muscle (P< 0.05). But, insertion to origin Kinesio taping did not change significantly any parameter (P> 0.05).
Conclusion: According to the results, Kinesio taping could influence on repositioning sense of the knee joint at 60-degree knee flexion. Maximum concentric and eccentric extensor torques was also increased.
