P01.21. Effect of acupuncture on isotonic contraction of elbow flexor
نویسندگان
چکیده
Methods Subjects are 20 healthy males. Maximum Voluntary Contraction (MVC) of elbow flexor was measured using a strain gauge prior to exercise (MVC1). Subjects received acupuncture stimulation before the exercise on their biceps brachii. The stimulation is either deep needling (targeting muscle; mACU) or superficial needling (sACU). The exercise protocol contains 5 sets * 10 repetitions of maximum contraction of elbow flexion at 50% MVC and 90 second intervals between sets. After the exercise subjects were measured for their MVC again (MVC2). The muscle power and the velocity of every contraction was measured using a dynamometer. Electromyogram (EMG) and muscle blood flow (MBF) were also observed during the exercise. Subjects did the same exercise and we measured the same parameter without any stimulation as control. The decrease of MVC between MVC1 and MVC2, muscle power and velocity among sets and repetitions were evaluated.
منابع مشابه
The Effects of Local Heating and Cooling of Arm on Maximal Isometric Force Generated by the Elbow Flexor Musculature in Male Subjects
Objectives: It is well known that neuromuscular function is temperature sensitive. Changing of muscle temperature can effect voluntary muscle contraction. The aim of this study was to investigate the effects of cooling and heating on maximal isometric force generated by the elbow flexor musculature in male subjects. Methods: Forty five healthy males encompassing 3 groups participated in the ...
متن کاملEccentric exercise increases EMG amplitude and force fluctuations during submaximal contractions of elbow flexor muscles.
The purpose of this study was to determine the effect of eccentric exercise on the ability to exert steady submaximal forces with muscles that cross the elbow joint. Eight subjects performed two tasks requiring isometric contraction of the right elbow flexors: a maximum voluntary contraction (MVC) and a constant-force task at four submaximal target forces (5, 20, 35, 50% MVC) while electromyogr...
متن کاملRelaxant effect of Humulus lupulus extracts on isotonic rat's ileum contractions
O Objective: Many biological studies have been done to determine the activity of medicinal plants on gastrointestinal function. Since acetylcholine is the major transmitter involved in the gastrointestinal motility and there are some evidences regarding the cholinergic modulatory effect of hops extract, in the present study spasmolytic and antispasmodic action of hops(Humulus lupulus) on acetyl...
متن کاملDynamic contributions of the flexor-pronator mass to elbow valgus stability.
BACKGROUND Previous studies have indicated that the demands placed on the medial ulnar collateral ligament of the elbow when it is subjected to valgus torque during throwing exceed its failure strength, which suggests the necessary dynamic contribution of muscle forces. We hypothesized that the flexor-pronator mass assists the medial ulnar collateral ligament in stabilizing the elbow against va...
متن کاملActivation among the elbow flexor muscles differs when maintaining arm position during a fatiguing contraction.
Twenty-four men (n = 11) and women (n = 13) supported an inertial load equivalent to 20% of the maximum voluntary contraction force with the elbow flexor muscles for as long as possible while maintaining a constant elbow angle at 90 degrees. Endurance time did not differ on the three occasions that the task was performed (320 +/- 149 s; P > 0.05), and there was no difference between women (360 ...
متن کامل