Want a stronger core? Ditch the floor exercises for standing ones, says this certified trainer

A smiling woman in long-sleeved crop top and leggings stands holding a pair of dumbbells overhead in her living room. Behind her we see a TV, plant and table.

I grew up doing my mom’s Jane Fonda workout videos with my sister in our living room.

If you’re in your late forties, you’ll remember the crunch was king back then—the more, the better!