plyometrics n. a type of fast exercise in which the muscles are not allowed to fully contract after being extended, typically involving jumping and bouncing. (source: Double-Tongued Dictionary)
Further reading
If someone urges you to spill the tea, they probably don’t want you tipping over a hot beverage. Originally, the tea here was the letter T, as in “truth.” To spill the T means to “pass along truthful information.” Plus...
The asthenosphere, as described in Brian Kevin’s Yellowstone and Grand Tetons National Parks guide (Bookshop|Amazon) is a gurgling sea of plasticized rock beneath the earth’s rocky crust. Asthenosphere derives from Greek asthenes...