"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.

A kettlebell workout may seem intimidating, but know that kettlebells are really just free weights. And most exercises that you can do with dumbbells, you can do with kettlebells. Still, even with ...

No offense to sit-ups, planks, and hollow holds, but basic core exercises can feel drab day after day. They work the abdominals, but if you’re looking for stronger, sculpted abs, let me introduce you ...