The sling is an ancient weapon known to Neolithic peoples around the Mediterranean, but is likely to be much older. It is possible that the sling was invented during the Upper Palaeolithic at a time when new technologies such as the spear-thrower and the bow and arrow were beginning to emerge. In Australia, the woomera has the same mechanical dynamics as the sling, transducing rotational movement into linear projection, although it is not known whether this was an independent invention or not. I

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🎾Save this video in case you want to try these grip variations for the 3 different types of serves. I find them useful for some players and I also use them when switching serves. 🎾If you are from the players that want to keep it simple stay with continental grips for all serves. 🎾Shop Tennis Equipment at www.head.com 10% OFF your entire purchase with code: Eli10 #tennis #serve #tip #grip #grips #tutorial #serving #flat | Eli Pironkova Tennis