Spontaneously generated isometric contractions
were amplified by bridge amplifier and digitized through an analog/digital interface (Power Lab 4/ST system) to acquire onto a personal computer.
Since muscle fatigue can be quantified as the decline in the maximal force or power measured (Enoka & Duchateau, 2008), maximum voluntary isometric force (MVIE) was measured by having the participants perform three maximal isometric contractions
before and at the end of each fatigue protocol.
Positive Hawkins-Kennedy Test, positive Speed's test, positive lift off test, painful isometric contraction
of supraspinatus, positive Neer's test, Positive apprehension-relocation test, and tenderness on trapezius muscle were the most common clinical signs observed in more than 40 % archers with CSP.
A dynamic network involving M1-S1, SII-insular, medial insular, and cingulate cortices controls muscular activity during an isometric contraction
reaction time task.
Abbreviations: 6MWT = 6-minute walk test, DGI = Dynamic Gait Index, FCWS = fastest comfortable walking speed, FMA = Fugl-Meyer Assessment, KE = knee extensor, MVIC = maximum voluntary isometric contraction
, PF = plantar flexor, POWER = Poststroke Optimization of Walking using Explosive Resistance, SSWS = self-selected walking speed, VA = Department of Veterans Affairs.
The LGP exercise realized with isometric contraction
promoted significant increase of RPP in the first set with 75% 1RM, may be by a rapid increase in both systolic pressure and diastolic pressure, which appears to be inappropriate for the amount of work produced by the contracting muscle.
Afterwards they were requested to perform an isometric contraction
of muscles against the resistance promoted by the evaluator.
The yoga session involved seated, standing and supine postures that included isometric contraction
and relaxation of different muscle groups and regulated breathing, and concluded with a meditative posture and deep breathing.
Sakamoto, "The Influence of Location of Electrode on Muscle Fiber Conduction Velocity and EMG Power Spectrum during Voluntary Isometric Contraction
Measured with Surface Array Electrodes", Applied Human Science, Japan Society of Physiological Anthropology, vol.
In previous studies, EMG data were acquired at 50% maximal voluntary isometric contraction
during grip, and analysed using normalized median frequency slope as a fatigue index.
Based on the early research it was reported that isometric strength gains of 5% per week occurred when healthy subjects performed a single, near-maximal isometric contraction
everyday over a 6-week period.
Activation of nitric oxide modulator effect by isometric contraction
in rat resistance arteries.
After the electrode positioning, the students were prepared for the maximum voluntary isometric contraction
During isometric contraction
, muscle thickening and shortening is dependent upon tendon stretch.
Traditional manual muscle testing requires an isometric contraction