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Selectorized dumbbells A set of fixed-weight dumbbells. By the early 17th century, the familiar shape of the dumbbell, with two equal weights attached to a handle, had appeared. [8] There are currently three main types of dumbbell: Fixed-weight dumbbells are weights created in a dumbbell shape.
Marion O'Brien Donovan (October 15, 1917 – November 4, 1998) was an American inventor and entrepreneur.Recognized as one of the era's most prominent female inventors, [1] she secured a total of 20 patents for her creations.
2004: First podcast, invented by Adam Curry and Dave Winer, is a program made available in digital format for download over the Internet and it usually features one or more recurring hosts engaged in a discussion about a particular topic or current event. [545] [546] [547] 2005: YouTube, the first popular video-streaming site, was founded
The TMNT already had a popular animated series, but a 1990 live-action film was such a smash, it made related merchandise a must-have that year—and for much of the '90s. BUY NOW Getty Images
Gyms were born from bell-ringing clubs with dumbbells invented for those that could not make it to the church towers. Colourfast dyes were created in Britain's first chemical works at Ravenscar when supplies of the mordant alum were cut off. The three-piece suit and necktie were created by Charles II as a political weapon in his war against France.
The Shake Weight on sale in stores. The Shake Weight is a modified dumbbell that oscillates, purportedly increasing the effects of exercise. As a result of the perceived sexually suggestive nature of the product, infomercial clips of the exercise device have gone viral.
As of the 2007–2008 school year, females made up 41% of the participants in college athletics. [52] In 1971–1972 there were 294,015 females participating in high school athletics and in 2007–2008 there were over three million females participating, a 940% increase in female participation in high school athletics. [ 52 ]
Five years ago, we were opening a gym with two Olympic weight-lifting platforms. Now we're opening gyms with 10. The majority of people using Olympic weight-lifting platforms are women; they're ...