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A limitation of analog timekeeping was the technology's inability to reliably record times accurately below one tenth (0.1) of a second. [3] In 1967, the Omega company of Switzerland developed the first electronic timing system for swimming that attempted to coordinate the physical the recorded time.
High-technology suits can increase one's swimming speed by around 4 percent. [1] Other studies suggest that high tech suits are able to reduce drag by around 4–6% and decrease energy cost by a similar amount. Other studies show evidence that in 50-meter races, these suits result in times that are approximately 0.5 seconds faster. [13]
Time Name Nationality Date Meet Location Ref 50 m freestyle: 21.04 +0.13: Caeleb Dressel United States: 27 July 2019: World Championships: Gwangju, South Korea [1] 200 m freestyle: 1:42.97 +0.97: David Popovici Romania: 15 August 2022: European Championships: Rome, Italy [2] 400 m freestyle: 3:40.08 +0.01: Ian Thorpe Australia: 30 July 2002 ...
A patient's ankle brachial pressure index (ABPI) must be >1.0 per leg to wear compression stockings, otherwise the stockings may obstruct the patient's arterial flow. The ABPI indicates how unobstructed a patient's leg and arm arteries are. Any competent doctor or nurse can measure and calculate a patient's ABPI.
A bellyband, wrap, or abdominal binder is a compression garment which resembles a tubetop but worn over the abdomen of expectant mothers. [2] Bellybands are also commonly worn post-childbirth to help provide abdominal and back support thereby making it easier to perform day to day tasks, and to help mothers with their posture.
The list of United States records in swimming includes records in short course yards, including the "USA record", meaning the fastest time by an American swimmer, and the "US Open record", meaning the fastest time within the United States. The vast majority of records in the 50 yard freestyle in the past 80 years have been set at U.S ...
Time Name Nationality Date Meet Location Ref 50m freestyle: 20.91 WR: César Cielo Brazil: 18 December 2009: Brazilian Championships São Paulo, Brazil [1] [2] 100m freestyle: 46.91 César Cielo Brazil: 30 July 2009: World Championships: Rome, Italy [3] [4] 200m freestyle: 1:42.96 Michael Phelps United States: 12 August 2008: Olympic Games ...
The compressive strength of the material corresponds to the stress at the red point shown on the curve. In a compression test, there is a linear region where the material follows Hooke's law. Hence, for this region, =, where, this time, E refers to the Young's modulus for compression. In this region, the material deforms elastically and returns ...