Track topics on Twitter Track topics that are important to you
Previous studies well documented the impact of unilateral training of limb muscle on the untrained contralateral homologous muscle. The aim of this study is to evaluate whether the electrical muscle stimulation on the dominant wrist flexors for 6 weeks cause an increase in the muscle strength of the contralateral wrist extensors in healthy adult men.
Ethical approval was obtained from Institutional Review Board. All participants were volunteers and provided written informed consent. Among young adult males working in our hospital, 30 subjects who voluntarily accepted to participate in this study were assessed for eligibility. Twenty three young-adult healthy males were included in this double-blind prospective study. These volunteers were randomized into two groups. In Electrical Muscle Stimulation (EMS) group, electrical muscle stimulation of the right wrist flexor muscles was applied; in Controls, transcutaneous electrical nerve stimulation was applied. Electrodes were placed over the flexor aspect of the right forearm in both groups. Electrical stimulation was applied for thirty sessions (one session a day, five days a week for six weeks) in both groups by the same researcher. Compex2 (Medicompex SA, Switzerland) was used for electrical stimulation. Isokinetic torque was measured in the right and left wrist flexors and extensors before and after trial. Isokinetic torque was measured in the right (trained) and left (untrained) forearm with the Cybex (Humac 2004/Norm) extremity-testing system.
It has been reported that strength training of unilateral limb causes an increase in voluntary strength not only in the trained limb, but also in the contralateral untrained limb. This phenomenon is known as "cross-education, cross-training or contralateral strength training effect" . Cross-education of muscle strength can occur in both upper and lower limb muscles.It is not gender and age specific and can occur with training accomplished by voluntary effort, electrical stimulation of muscles or mental practice of unilateral contractions. Electrostimulation is one of the most efficient methods to induce cross-education.
Although it is clear that unilateral training has a contralateral effect, the mechanisms behind this effect remain unclear. Because of the specific nature of cross education, modification in neural function is the more likely mechanism underlying this effect. The potential neural mechanisms can be broadly categorized as either ''central" or ''peripheral (spinal)" adaptations. Central neural mechanisms involved in the excitation of the relevant part of the cortex during voluntary contraction of the trained limb are thought to produce contralateral facilitation. The cross-extension reflex is the primary spinal neural mechanism for cross-education.
In the studies performed up today, the contralateral effects of unilateral training were evaluated in the contralateral homologous muscles. However it's not reported whether a change in the muscle strength have been observed in the antagonists of the contralateral homologous muscles. In a study, after one session of unilateral surface electrical stimulation of the rectus femoris, an increase in the isometric force and EMG activity of the contralateral rectus femoris, but a decrease in the EMG activity of the contralateral biceps femoris was reported in adult men. It's proposed that, the EMG activity decrease in the biceps femoris may be explained by cross-extension reflex. The effect of long-time exercise or electrical muscle stimulation on the antagonists of the contralateral homologous muscles is not clear.
The aim of this study is to evaluate whether the electrical muscle stimulation on the dominant wrist flexors for 6 weeks cause an increase in the muscle strength of the contralateral wrist extensors in healthy adult men.
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Outcomes Assessor), Primary Purpose: Basic Science
Experimental group, Control group
Vakif Gureba Training and Research Hospital
Published on BioPortfolio: 2014-08-27T03:14:38-0400
This randomised controlled trial aims to investigate a resistance training program for improving glycemic control, muscle mass, strength and functional performance in older patients with T...
Previous studies have shown that peripheral muscles weakness or inhibition is related to spinal disorders. Passive mobilization and manipulation are likely to reverse such muscle weakness....
Background: Tension Type Headache (TTH) is highly frequent and is of great socio-economic importance. Andersen et al. 2008 has shown that maximal muscle strength is reduced in women with ...
This is a prospective, randomized controlled trial that will enroll patients undergoing unilateral meniscal root repair or meniscus transplant. The objective of this study is to determine ...
This randomised controlled study investigates the effect of Kinesio Taping on pulmonary function, respiratory muscle strength, functional capacity, functional mobility, hand grip strength,...
The purpose of this study was to determine the effects of six weeks of electrical muscle stimulation (EMS) on the strength and muscle mass of the infraspinatus muscle. Twenty non-athletes (age: 24±3....
To assess the association between whole-body and calf impedance vectors and muscle mass and strength in a group of elderly individuals.
Running economy (RE) is impaired following unaccustomed eccentric-biased exercises that induce muscle damage. It is also known that muscle damage is reduced when maximal voluntary isometric contractio...
Ikeda, N and Ryushi, T. Effects of 6-week static stretching of knee extensors on flexibility, muscle strength, jump performance, and muscle endurance. J Strength Cond Res XX(X): 000-000, 2018-The purp...
Infraspinatus muscle atrophy is common in professional volleyball players, but it is unclear whether commonly observed strength and proprioception deficits can be reversed with training. Fifty-four pa...
Groups that serve as a standard for comparison in experimental studies. They are similar in relevant characteristics to the experimental group but do not receive the experimental intervention.
The amount of force generated by MUSCLE CONTRACTION. Muscle strength can be measured during isometric, isotonic, or isokinetic contraction, either manually or using a device such as a MUSCLE STRENGTH DYNAMOMETER.
A device that measures MUSCLE STRENGTH during muscle contraction, such as gripping, pushing, and pulling. It is used to evaluate the health status of muscle in sports medicine or physical therapy.
A study in which observations are made before and after an intervention, both in a group that receives the intervention and in a control group that does not.
An involuntary contraction of a muscle or group of muscles. Spasms may involve SKELETAL MUSCLE or SMOOTH MUSCLE.
Arthritis Fibromyalgia Gout Lupus Rheumatic Rheumatology is the medical specialty concerned with the diagnosis and management of disease involving joints, tendons, muscles, ligaments and associated structures (Oxford Medical Diction...
Within medicine, nutrition (the study of food and the effect of its components on the body) has many different roles. Appropriate nutrition can help prevent certain diseases, or treat others. In critically ill patients, artificial feeding by tubes need t...