Originally tennis in French was called paume because 1. the tennis racket wasn’t invented yet and 2. people used their hands. Paume later became jeu de paume and that's when racquets were used. Tennis is a sport where you are on a court with a type of paddle for this specific sport called a tennis racket. In the english language, sports, for the most part, have answered intuitive and descriptive names. Italians mentioned in the Cronica de firenza of Donato Velluti (who died in 1370) as tenes. Etymologists have batted around tennis for years—hundreds of years, actually, going back to at least 1617, when linguist John Minsheu made a claim that, in many circles, still holds water today. As the Oxford English Dictionary recounts, Minsheu argued that tennis derives from the French imperative tenez, meaning “hold",” or more aptly, “take, receive.” (Anthropologist John Fox, in his book The Ball, translates tenez more colloquially as “take heed.”) The argument goes that, sometime around the game’s medieval beginnings, in 12th-century France, tenez functioned as a sort of verbal ritual, a fair warning called out by servers to their opponents before starting a point. By and by, English speakers picked up the game and, presumably, the utterance. Whereupon, having migrated into common usage, it was, to the OED’s best knowledge, first written down as te‘netz, around 1400 as said by thoughtco and tennis.com.
Singles, doubles or against a backboard on your own, tennis is a great activity that can keep you in shape whether you’re age 5 or even 95. It keeps your cardiovascular and muscular system in tip top shape even as you age. Plus, you can’t beat a strategic mental game that lets you enjoy the fresh outdoors. Unlike some sports, playing tennis is a good workout for the entire body. You use your lower body for all that running, jumping, crouching, stopping, and starting. And the action of hitting the tennis ball, whether it’s single or double-handed, means that your trunk does a lot of work, in particular your shoulders and upper back. Tennis increases your oxygen intake while playing, increasing your heart rate while helping your blood deliver oxygen and nutrients to all of your muscles. It also aids in the start of numerous capillaries and capillary beds within the muscles so that your muscles can have a better blood supply and flow. This helps in your muscles perform at a higher level and fatigue at a lower rate. It also helps in maintaining anaerobic health, which allows the muscles to use oxygen in a better way and provide quicker energy spurts for strong power and reactivly quick movements as said by the healthfitnessrevolution.