At each session, participants were first required to perform three maximal voluntary isometric contractions
(MVIC) for 5 seconds each, with a 5-minute rest between contractions.
An isometric contraction
was performed by the subject for each part of the trial.
Merletti, "Repeatability of Surface EMG Variables during Voluntary Isometric Contractions
of the Biceps Brachii Muscle", Journal of Electromyography and Kinesiology, Elsevier, vol.
The surface EMG of the extensor carpi radialis, the extensor digitorum and the superficial flexor digitorum were recorded during maximum and sub-maximal isometric contractions
of five seconds in flexion and extension of the wrist.
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.7
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
. Isometric contractions
can significantly increase arterial blood pressure.
(36) Clark et al (37) therefore submitted that the sex difference observed during isometric contraction
was not influenced by torso length, as there was no significant relationship between torso length and endurance time.
This study examined whether arm position and muscle activity affect the duration of an isometric contraction
. The authors discovered that overhead isometric contractions
of the arm required less effort and induced less hemodynamic stress than waist level contractions.
occurs when muscles are loaded while stationary (e.g., two hands pushing against each other).
One end of the aorta was attached to a force-displacement transducer (Kishimoto UM-203) so that its isometric contraction
could be recorded (NEC RECHI HORIZ-8 K, Tokyo, Japan).