"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Situps and crunches aren't the only (or even the best!) way to strengthen and define your abs. For proof, ...

There isn’t much you can’t train with a kettlebell. You can build muscle in your lower body and upper body, challenge your cardio fitness, and get your entire body working as one with dynamic, ...

If you’re looking for ways to increase the difficulty of your core workouts without simply upping the amount of reps or time you work for, then adding in some weight is a great option. This 12-move ...

Confession: I'm a certified personal trainer, but I absolutely dread core work. (Anyone else?) My loathing could be because my core has always been one of my weakest muscle groups, or the burning ...

The other day, I got bored. And like the fitness nerd I am, when I get bored, I turn to workout programming. My latest exercise baby is this 15-minute kettlebell abs workout that only requires one ...

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 ...

A personal trainer shares a 20-minute, at-home kettlebell abs workout that you can do without leaving your living room. Whether you’re swinging, twisting, or dragging the bell, each exercise ...

Kettlebells are effective strength-training weights for working your entire body. Just ask two trainers we previously spoke to. Vincent Metzo, CSCS, dean of advanced personal training at the Swedish ...

No matter your fitness goals, it's important that strengthening your core is part of your routine. A strong core is essential for good posture, and it's the foundation for movements like walking and ...

YOUR CORE TRAINING routine needs to evolve beyond bodyweight. Whether your goal is to train for aesthetics or performance (hopefully, you'll be concerned about both), you'll only get so far by running ...