Download or read book Generalizability of Isokinetic concentric Measurements of Knee Extension and Flexion Peak Torque Total Work and Average Power written by Jody Carl Andersen and published by . This book was released on 1992 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1993 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparison of isokinetic knee estensor torque measurements over repeated trials using the Kin Com written by Ann K. Bolger and published by . This book was released on 1988 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Experimental Investigation of Isokinetic Eccentric Versus Isotonic Eccentric Training on Torque Work and Power Changes for Knee Extension written by Ashraf G. Veldekens and published by . This book was released on 1996 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to examine the effect of isokinetic eccentric muscle training activities in comparison with isotonic eccentric muscle training activities of the quadriceps muscle for knee extension (torque, work, and power). Forty-five healthy female volunteer subjects between the ages of 22 and 64 were recruited for this training study. the null hypotheses were that there would be no difference between the control, isotonic and isokenetic groups and no difference in the baseline to post training sessions. All subjects had an orthopaedic screening of their lower extremities. In a test/retest experimental design, the right quadriceps muscle groups of each subject was tested in the isokinetic mode with an eccentric/extension contraction. Subjects were divided into three groups--Eccentric Isotonic (ET), Eccentric Isokinetic (EK), and the Control (C). the EK training included 5 eccentric knee extension and flexion contractions on the BioDex Unit at the speeds of 60, 60, 75 and 75 degrees per second. Five repetitions were done with a 10 second rest. the ET group was exercised in the isotonic mode on the BioDex. the ET performed twenty eccentric exercise repetitions at each training session. the resistance load was adjusted for each subject through the training interval to assure isometric maximal quadriceps loading (in extension) for twenty repetitions. Twenty-four training sessions were performed at the same time of day for both groups. the control group was not trained. Subject performance data on peak torgue (PT) and total work (TW) was collected on the computer system using SYSTAT. A two-way ANOVA was used to determine the effect of group on peak torque and total work. Statistically the results showed that no significant differences existed between the isokinetic eccentric and the isotonic eccentric training for knee extension. Power using a vertical jump test after training was not significant either. An ANCOVA analysis was performed with pretraining measurements of torque as the co-variable. Although there were no significant differences from any of the dependent variables, there was a slight trend for improvement in isokinetic eccentric training, primarily in the variable of total work.

Download or read book Reliability of Isokinetic Concentric and Eccentric Knee Flexor and Extensor Torque Measurements on the Kinetic Communicator written by Laura Dale Knapp and published by . This book was released on 1991 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Theoretical Use of Isokinetic Muscle Strength Measurement to Predict Job Related Injury written by Adi Wang and published by . This book was released on 1994 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Power Development Through Low Velocity Isotonic Or Combined Low Velocity Isotonic high Velocity Isokinetic Training written by Joshua R. Seligman and published by . This book was released on 2003 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Purpose. The purpose of this study was to increase power via a combined high velocity isokinetic, and low velocity, heavy resistance isotonic, training regimen. Methods. Twenty-nine subjects (aged 19-29 yrs) were pre- and post-tested for the following dependent variables; vertical jump leg power (VJP) and vertical jump height (VJH); Wingate peak anaerobic power (PkAnP), Wingate PkAnP kg-1, and Wingate mean anaerobic power (MAnP); isotonic one-repetition maximum (1RM) squat, knee flexion, and knee extension; and isokinetic peak torque (PT) and time to peak torque (TPT) at 60, 180, 300, 400, and 500°sec-1. Subjects, who were randomly assigned to three groups, trained twice a week for 10 wks. Group 1 (n=9) performed isotonic knee flexion and extension exercises, Group 2 performed seated isokinetic consecutive knee extension-flexion (concentric-concentric) exercises, and Group 3 performed a combination of the isotonic and isokinetic exercises of groups 1 and 2. All groups also performed squats at the start of each training session. Results. Significant improvements were revealed from pre- to post-test for all dependant variables regardless of group. Peak torque extension values were significantly greater for group 1 than group 2 (mean difference= 14.2 ft lbs, SEE= ±6.04; p

Download or read book Effect of Slow Velocity Isokinetic Knee Actions on Slow and Fast Velocity Contralateral Knee Action Performance written by Colin Arthur Duffett and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue is a complex, multifactorial phenomenon that affects the neuromuscular system from the muscle fibers and neuromuscular junction to the higher planning centers in the brain and reflects interactions along the entire system. 'Neuromuscular fatigue' refers to the decrease in physical performance associated with an increase in the real and/or perceived difficulty of a task, regardless if the force or power can be sustained, and is present and progressing from the onset of the task that is reversible with rest. It consists of central and peripheral components such as decreases in central drive (central fatigue) or contractile responses (peripheral fatigue) and is suggested to occur at any site involved in the muscle contraction. Fatigue also has a mental component that describes an emotion suggested to act as a warning sign for maintaining physical integrity. Neuromuscular fatigue may depend on both the muscles employed and on the type of exercise from which fatigue results and are specific to the task and dependent on the mechanisms which are the most stressed during the task. Fatigue can either be localized or global, meaning it can affect the muscles exercised or the entire body system resulting in fatigue effects in non-exercised muscle groups. A growing body of research revolves around the effects of fatiguing exercise and their impact on the performance of non-exercised muscles, termed non-local muscle fatigue (NLMF). The presence of NLMF effects is conflicting, with effects seemingly dependent on many factors such as contraction intensity, fatiguing exercise volume, muscle group fatigued and tested, muscle action, and the detection method(s) used. NLMF research has many implications for rehabilitation and training purposes, as well as widening our understanding of global fatigue mechanisms. A relatively unexplored aspect of NLMF is whether the testing is velocity specific. The purpose of this study was to investigate the effects of fatigue induced by simultaneous low velocity unilateral isokinetic knee extensions and flexions on contralateral knee slow and fast velocity extensor and flexor isokinetic force and electromyography (EMG). In a randomized, repeated measures, crossover design, peak torque, EMG, and rate of perceived exertion measures were measured from the non-dominant vastus lateralis and biceps femoris before and after unilateral fatiguing protocols of the dominant knee extensors and flexors. The fatiguing protocols consisted of 4 sets of 15 maximal isokinetic knee extension and flexion contractions. In addition, a fatigue resistance test was also completed post-intervention. The current study used 16, university-aged (ages 18-30) participants (10 males and 6 females) who were resistance trained. Peak torque of the dominant (exercised) quadriceps and hamstrings decreased when tested at slow and high velocities. Peak torque of the non-dominant quadriceps and hamstrings during post-test (p=0.6 and p=0.3 respectively), or first or last repetition of repetitive fatigue test (p=0.8, p=0.06, and p=0.8, p=1.0, respectively) tested at slow velocity was not significantly different from control, demonstrating a lack of peak torque or fatigue endurance NLMF effects. In addition, there was no relative (normalized) differences in peak torque for velocity specific or fast test velocities. However, the fast velocity repetitive fatigue test resulted in a greater decrease from first to the last repetition than the slow test, as demonstrated by the fatigue index (FI), but was not significantly different from control. This study highlights that prior unilateral fatigue of the dominant quadriceps and hamstrings by repetitive slow maximal isokinetic actions did not demonstrate decreases in singular maximal peak torque or repetitive fatigue endurance in the contralateral muscles. In addition, velocity specific effects were not demonstrated in relative peak torque or relative fatigue endurance changes. There was also no observable effect on the rating of perceived exertion following control vs fatigue (4.6 vs 6.3, p>0.05), or slow vs. fast testing (5.8 vs 6.8, p>0.05) on post-repetitive test values.

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1992 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Isokinetic Exercise and Assessment written by David H. Perrin and published by . This book was released on 1993 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Isokinetic Exercise and Assessment not only presents a scientific basis for the use of isokinetics, it also provides practical guidelines for applying isokinetics in clinical practice. This approach, plus the book's extensive normative value tables, makes it a suitable textbook and reference for students and practitioners of athletic training, physiotherapy, rehabilitation medicine, and strength training.

Download or read book The Effects of a Seven week Isokinetic Training Program on Eccentric Strength Development written by Diane McCurry and published by . This book was released on 1985 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study examined the effects of a 7 wk eccentric isokinetic training program (60 degrees/sec) on peak torque (PT), total work (TW)and peak torque/body weight (PT/BW) of the knee extensors. Thirty-one men and women from the University of Wisconsin- La Crosse physical education and physical therapy classes participated in the study. Ss were tested for strength on the KIN-COM at 60 degrees/sec and 180 degrees/ sec, pre and post a 7 wk training program. The experimental group (20 Ss)performed 3 sets of 10 repetitions of eccentric knee extensions at 60 degree/sec 3 times a wk for 7 wks. The control group consisted of 11 Ss. A t-test for independent samples of mean differences between the 2 groups was done ti determine if the training program would cause a significant increase in strength at both slow and fast velocities.

Download or read book The Effect of Static Stretching and Order of Warm up on Isokinetic Peak Torque of the Knee Extensors written by Eric J. Sobolewski and published by . This book was released on 2010 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purposes of these studies were to determine if an acute static stretch influenced isokinetic peak torque (IPT), and to examine if the order in which the warm up routine was performed affected peak knee extension torque. Twenty trained college male students performed maximal isokinetic knee extensions under four conditions: a control consisting of no stretching, a stretch only trial, jog then stretch, and stretch then jog conditions. Each stretch was held for a total volume of 360 s. Measurements were taken on a Biodex System 3 isokinetic dynamometer at speeds of 60° s−1 and 300° s−1. Data were analyzed using t-tests to compare the stretch condition with the control. The results indicated that there was a significant difference between the stretch and the control at 300° s−1 (p = 0.03 t = 2.42) but not at 60° s−1 (p = 0.16). A 2 x 3 ANOVA (300° s−1 x 60° s−1, and control x stretch then jog x jog then stretch) yielded no significance at either speed (p> 0.05). Conclusions from this study indicate that stretching should not be the sole exercise in a warm-up routine as previous research confirms the decrease in IPT after stretching. Another finding of this study is that the negative effects of stretching can be diminished when combined with an aerobic activity such as jogging prior to performance. Further research is needed to determine the underlying factors that contribute to the post stretch decrease in IPT and the factors that lead to the restoration of force after aerobic activity. Caution is advised since these were controlled tests in a laboratory and results may vary with actual performance.

Download or read book Effect of Visual Feedback on Concentric Peak Torque Production During Knee Extension and Flexion Exercise written by Edward R. Gasiewski and published by . This book was released on 1993 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparison of Isokinetic Concentric and Eccentric Knee Extensor Work and Torque in Endurance Runners and Endurance Cyclists written by Matthew H. Ficca and published by . This book was released on 1993 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Comparison of Hypertrophy Strength and Power Changes Between Eccentric Isotonic and Eccentric Isokinetic Leg Training written by Gail M. Trojack and published by . This book was released on 1986 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of 6 week eccentric isotonic and eccentric isokinetic training programs on hypertrophy, strength and power development in the quadriceps were compared. Male Ss (N=22) participated including 7 training isotonically (T), 7 training isokinetically (K), and 8 control subjects performing no resistance leg training (C). Ss performed 3 sets of 10 repetitions on Monday, Wednesday and Friday with an additional set on Friday to systematically adjust work load. No group significantly increased thigh girth or body weight. Both groups exhibited carryover of concentric strength from eccentric training in certain tests. (T) improved significantly over (C) in isotonic concentric one repetition maximum, 5 second isometric, and both Margaria Kalaman power tests. (T) improved significantly over (K) in the concentric isotonic one repetition maximum as well. (K) improved significantly over (C) in average concentric peak torque (170°/second) and in the Margaria Kalaman power test at 6 meters. Both groups exhibited carryover of strength when tested at fast speeds from slow speed training programs (60°/second). (T) improved significantly over (C) in average eccentric peak torque (170°/second) and the Margaria Kalaman tests of power. (K) significantly improved over (C) in average concentric peak torque (170°/second), eccentric total work (170°/second) and the Margaria Kalaman power test at 6 meters. Both groups significantly improved over (C) in eccentric isotonic one repetition maximums. Only (K) significantly increased average eccentric peak torque at 60° /second over (C).

Download or read book Relationship of Isokinetic Peak Torque with Work and Power During Ankle Plantar Flexion and Dorsiflexion written by Aurelio De Leon and published by . This book was released on 1997 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Anthropometric Parameters as Predictors of Peak Isokinetic Torque of Knee Extension and Flexion in the Young Athlete written by Daniel S. Rooks and published by . This book was released on 1989 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: