Muscle actions in which the muscle shortens and lengthens and movement occurs at the joint.
Solutions with the same osmotic pressure; often refers to a solution with the same osmotic pressure as body fluids. Hypertonic and hypotonic refer to solutions that are more and less concentrated.
A contraction in which a muscle shortens against a force, resulting in movement and performance of work; also referred to as a dynamic or concentric contraction.
Having the same salinity as body fluids. You can make a quart of water isotonic by adding a slightly rounded measuring teaspoon of table salt.
A solution having the same osmotic pressure as physiological saline.
Referring to a solution, e.g. a saline drip, which has the same osmotic pressure as blood “serum and which can therefore be passed directly into the body.
Isotonic refers to “the same pressure.” In nutrition, isotonic beverages exert the same osmotic pressure as plasma. In exercise, the term isotonic is used to refer to resistance-training exercises in which the same pressure is applied throughout the muscular contraction, although in truth, as biomechanics change throughout the range of contraction, the resistance encountered can vary throughout the exercise. Isotonic exercises can be divided into those that produce either concentric or eccentric contractions, which are described in separate entries.
Of equal pressure or concentration, especially in a solution.
Describing solutions that have the same osmotic pressure.
A term applied to solutions which have the same power of diffusion as one another. An isotonic solution used in medicine is one which can be mixed with body fluids without causing any disturbance. An isotonic saline solution for injection into the blood, so that it may possess the same osmotic pressure as the blood serum, is one of 0-9 per cent strength that is, containing 9 grams of sodium chloride to 1 litre of water. This is also known as normal or physiological salt solution. An isotonic solution of bicarbonate of soda for injection into the blood is one of 1-35 per cent strength in water. An isotonic solution of glucose for injection into the blood is one of 5 per cent strength in water.
Relating to the maintenance of a constant amount of resistive force during muscular contraction.
Maintaining consistent tension. This phrase is utilized to describe a workout regimen, like weight lifting, where the muscular tension remains uniform while the body engages against its inherent or external resistance. The term “isotonic” also pertains to fluids, such as intravenous solutions or beverages, that possess an equivalent osmotic pressure to that of the blood.