what is the relationship between muscle force and an emg?
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Most of the theoretical studies relating the surface electromyogram (s.e.m.g.) to muscular force suggest that the amplitude of the e.m.g. should increase proportionately with the square root of the tension. However, direct experiments have shown a linear relationship.
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Force is the fundamental result of an interaction between two objects, while power is an expression of energy consumed over time (work), of which force is an element. Force and power can both be described and measured, but a force is an actual physical phenomenon, and power in itself is not.
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The relationship between Force and Energy is that: E = Force * Distance. If a force (weight, for example) of 1 Newton, is moved, against the direction of the force, by 1 Metre, the work done is i Joule. Additionally, if that 1 Joule of energy is to be expended in 1 second, the power required is 1 Watt.
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Per my graph the relationship between the force and the current is adirect/proportional relationship. When one increases so does the other andvice versa.
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Support and Movement Skeletal muscles move the body. Skeletal muscle contractions pull on tendons, which are attached to bones. If contraction of the muscle causes the muscle to shorten, the bone and, thus, the body part will move. For example, the biceps brachii is attached to the shoulder and the forearm bones.
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Muscular endurance is the ability of a muscle to repeatedly exert force over a period of time, and to build muscular endurance you should do sets of 12 to 20 repetitions. Muscle strength is the maximum amount of force that a muscle can generate. The body adapts to this type of training by increasing muscle size.
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The electrical force is inversely proportional to the distance. The gravitational force is inversely proportional to the square of the distance.
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Muscular strength is the amount of force you can put out or the amount of weight you can lift. Muscular endurance is how many times you can move that weight without getting exhausted (very tired).
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Skeletal muscles move the body. Skeletal muscle contractions pull on tendons, which are attached to bones. If contraction of the muscle causes the muscle to shorten, the bone and, thus, the body part will move. For example, the biceps brachii is attached to the shoulder and the forearm bones.
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EMGs can detect abnormal muscle electrical activity in many diseases and conditions. It is particularly useful in conditions such as muscle inflammation or myositis, pinched peripheral nerves like carpal tunnel syndrome, disc herniation with pinched nerves, ALS, and many more conditions.
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Skeletal muscles only pull in one direction. For this reason they always come in pairs. When one muscle in a pair contracts, to bend a joint for example, its counterpart then contracts and pulls in the opposite direction to straighten the joint out again.
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The force-velocity relationship describes how muscle force depends upon the velocity of movement or vice versa.
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The sliding filament theory is the explanation for how muscles contract to produce force. As we have mentioned on previous pages, the actin and myosin filaments within the sarcomeres of muscle fibres bind to create cross-bridges and slide past one another, creating a contraction.
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Muscular strength is determined by how much force you can exert or how much weight you can lift. Building muscular strength uses heavier weights for fewer repetitions. Muscular endurance refers to the ability of a muscle to sustain repeated contractions against resistance for an extended period of time.
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Muscular strength is defined as the maximum amount of force that a muscle can exert against some form of resistance in a single effort.
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['Reason 1. muscles work best when used correctly.', 'Reason 2. correct use of muscles makes lifting, pulling, and pushing easier.', 'Reason 3. correct application of body mechanics prevents injury to self and others.', 'Reason 4. correct application of body mechanics prevents injury to self and others.']
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Muscle cells bring parts of the body closer together. They are well suited to this function because: Muscle cells are held together in bundles, which pull together to make muscles contract (get shorter and fatter).