Abstract Muscle fatigue is a limiting factor of human performance. It unclear whether sex-based differences in fatigability exist during dynamic exercise varying velocities contraction. We aimed at exploring sex muscle elicited by maximal isokinetic contractions performed different angular velocities. Twenty-six healthy participants (13 men: 23.2 ± 1.5; 13 women: 21.9 3.0 years) were tested for...

OBJECTIVE The present study assessed the reliability and validity of isokinetic dynamometry in the qualitative determination of the evolution of total knee arthroplasty. CASES 20 patients whose mean age was 71.35 years, undergoing knee arthroplasty, and 25 controls whose mean age was 71.36 years. METHOD Computerized isokinetic assessment of flexor and extensor muscles using a CYBEX 6000 dyn...

The purpose of this study is to examine the relationship between isokinetic strengths, subjective knee scores, and functional performance in patients with an ACL-reconstructed knee. Methods: Fifty-five male patients between the ages of 16~53 years were enrolled in this study. At the time of testing, a mean 19.7 months had elapsed since the patients had received ACL reconstruction. Muscle streng...

OBJECTIVES To determine if the muscle force and electromyographic activity in the scapular rotators of overhead athletes with impingement symptoms showed differences between the injured and non-injured sides. METHODS Isokinetic peak force was evaluated during protraction and retraction of the shoulder girdle, with simultaneous recording of electromyographic activity of the three trapezius mus...

The authors compared heart-rate and blood-pressure responses to typical isometric (ISO) and isokinetic (90 degrees /s) eccentric (ECC) resistance-training protocols in older adults. Twenty healthy older adults (74 +/- 5 years old) performed randomly ordered ISO and isokinetic ECC exercise (3 sets of 10 repetitions) at a target intensity of 100 % of their peak ISO torque value. Heart rate and sy...

We investigated the isokinetic performance of hip muscles and clinical outcomes after revision total hip arthroplasty (THA) via same anterolateral approach used in primary surgery. Thirty patients who had undergone previous THA via an anterolateral approach underwent both acetabular and femoral component revision after aseptic loosening. The Harris Hip Score (HHS) was evaluated during a minimum...

Isokinetic resistance is frequently used to strength profile healthy athletes and to evaluate the status of injured athletes involved in rehabilitation programs. The purpose of this investigation was to determine the reliability of peak torque, torque acceleration energy, endurance ratio, average power, and total work measures obtained with a Cybex isokinetic dynamometer. Fifteen college studen...

Eccentric exercises are increasingly prescribed in the assessment and rehabilitation of musculo-skeletal injuries and disorders [1,2]. Under experimental conditions, researchers have also used isokinetic tools for investigating delayed onset muscle soreness (DOMS) induced by repeated eccentric bouts of contraction [3]. A better knowledge of the cardiovascular and metabolic response to maximal i...

OBJECTIVE To investigate pulmonary function, working capacity and isokinetic muscle strength in subjects with Marfan syndrome. MATERIALS AND METHODS Seventeen subjects, mean age 23 years, performed spirometry, maximal ergometer cycle tests and knee extension and flexion isokinetic torque tests. RESULTS The subjects with Marfan syndrome had increased total and residual lung volume values com...

Strength is a fundamental quality necessary in achieving optimal physical function and is defined as the ability to produce more force.(Siff M; Stone MH et al., 1993). Thus the display of strength has characteristics which include a magnitude, rate and direction. The force production can be measured by isotonic, isometric or isokinetic methods. The isotonic techniques require lifting a particul...