This one’s an abs-olute winner. A classic, fit-for-all workout is back in the spotlight after a popular workout video resurfaced, showing a fitness influencer’s surefire way to a rock-hard core using ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." No offense to sit-ups, planks, and hollow holds, but basic core exercises can feel drab day after day.

Build core muscle and strengthen your legs and glutes with just a pair of kettlebells, five exercises and a 25-minute workout. For those looking to carve out a quick kettlebell workout between ...