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The legs of water beetles have little hairs which spread out to catch and move water back in the power stroke, but lay flat as the appendage moves forward in the return stroke. Also, one side of a water beetle leg is wider than the others and is held perpendicular to the motion when pushing backward, but the leg rotates when the limb returns ...
Combat sidestroke: This stroke was developed and used by the United States Navy SEALs and is designed to be more efficient and reduce profile in the water. Composite stroke is drill stroke within one basic stroke, ins (for example, Front crawl flutter/scissor Dolphin/Dolphin flutter) or between two basic stroke, weens (Over arm 1 Arm Lead ...
The trudgen is a swimming stroke sometimes known as the racing stroke, or the East Indian stroke. It is named after the English swimmer John Trudgen (1852–1902) [1] and evolved out of sidestroke. [2] One swims mostly upon one side, making an overhand movement, lifting the arms alternately out of the water.
The stroke of the foot through the water also generates vortices that aid propulsion. During the transition from drag-based to lift-based propulsion in ducks, leading edge vortices formed on the front of the foot are shed, which creates a flow of water over the foot that likely aids lift production. [ 1 ]
According to a study by the American Heart Association, cardiovascular risks are “highly associated with increased social and environmental adversities.” […] The post Internet, parks, train ...
Another insect known to walk on the water surface is the ant species Polyrhachis sokolova. The pygmy gecko (Coleodactylus amazonicus), due to its small size and hydrophobic skin, is also able to walk on the water surface. [2] According to biophysicist David L. Hu, there are at least 342 species of water striders. [3]
Type of amputation for an A1 classified sportsperson. A1 and A3 swimmers in this class have a similar stroke length and stroke rate to able bodied swimmers. [8] A study comparing the performance of swimming competitors at the 1984 Summer Paralympics found there was no significant difference in performance in times between men and women in A2 and A3 in the 50 meter breaststroke, men and women ...
Cerebral infarction, also known as an ischemic stroke, is the pathologic process that results in an area of necrotic tissue in the brain (cerebral infarct). [1] In mid to high income countries, a stroke is the main reason for disability among people and the 2nd cause of death. [2]
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