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ND: Natura Docet

The monthly dedicated the cover of February 2020 to Prof. Lisi.
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Is swimming really good?

by Rodolfo Lisi - from "ND: Natura Docet" - February 2020

If it is true (as we will see later) that swimming does not induce an improvement in the rotational state of the vertebrae (scoliosis) and is not always useful in order to soothe a vertebral pain resulting from damage or biomechanical problems, this sport can nevertheless be used with excellent rehabilitative effects in subjects to be re-athletized following major traumas of the musculoskeletal system. One of the exploitable effects to recover a musculoskeletal injury lies in re-education through muscle contraction and stimulation of nerve receptors (proprioception). In water, the work done by muscle fibers could be defined as "isokinetic". Isokinesia has been used, since the 80s of the last century, by means of very expensive equipment for the functional recovery of osteo-articular and muscular lesions of the limbs and, above all, in the results of joint hypovalidity following a fracture. Dynamometry made it possible to detect important clinical data but also functional details capable of integrating more traditional recovery methods and techniques that exploited isotonic and isometric muscle contraction. The exorbitant costs of isokinetic dynamometers were soon amortized by exploiting the effects of work in an aquatic environment in which the resistance of the medium is constant. This allowed an excellent isokinetic muscular work with an almost irrelevant economic expense. Work in the pool can improve maximal strength, explosive strength, endurance, joint range of motion; the insiders obtain technical data such as the peak of the moment of force (Peak Torque), the Total Work, the Fatigue Work. It is possible to affirm that the aquatic sports disciplines allow to acquire an excellent control of the ventilatory functions, act on the respiratory capacity and on the levels of efficiency and athletic performance giving indications to exercise even in subjects suffering from disventilatory syndromes. Finally, swimming retains an undoubted value as a stimulus and cardio-circulatory support activity. However, in the presence of idiopathic scoliosis, important biomechanical and kinesiological considerations need to be formulated when the body is immersed in the pool. First of all, given the constant thickness of the chest wall, the buoyancy buoyancy is directly proportional to the radius and pressure caused by the body itself. A scoliotic rib cage is asymmetrical and, therefore, it follows that, when immersed in water, the hydrostatic biomechanical force of the thrust takes on a pulling character in the short-radius areas and compression in the large-radius areas ... continue on the magazine

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