n. A training regimen that focuses on strengthening the body's trunk muscles, especially the stomach and lower back.
2001
No one answers. They're too busy concentrating on conditioning their 'core,' which is the whole point of this Reebok core board class. 'Core training' has become a buzzword in today's fitness circles, aimed at helping baby boomers — nearly 77 million strong — stave off the effects of aging by working from the inside out.
1997 (earliest)
8:30 a.m. We drag ourselves from bed, having missed the early-morning walk. We don swimsuits for 'core training,' a water class that focuses on strengthening the back and stomach.
The youngest of the baby boomers turn 35 this year, which means that it won't be long before the entire "hump" is complaining about aching backs and expanding paunches. So it's no wonder that core training has become such a buzzword. This method of training has been around forever, but the core training label seems to be only a few years old, as the earliest citation shows.