Tighten your abs and strengthen your lower back in two easy steps a day — along with a four-move routine you can complete anywhere with nothing more than a dumbbell and a pillow.

Master these ab-strengthening moves for a strong, solid core.

What you need to do to work up to the ab wheel.

Two’s company! Double up on your results and have some fun in the process with this partner-assisted core routine.

Congratulations! You've mastered the 5-minute plank.

It may not be easy, but it sure is effective — learn how to get the most out of an ab wheel, then dig into these two beginner and intermediate workouts.

Five minutes of planking plank may sound like an impossible goal, but this plan will get you there in just 30 days.

This exercise will leave your abs feeling a little more dead (or should we say undead) than usual.

Grab a dumbbell or plate and try this four-piece core routine!

Work your whole body and get vertical with this badass, arachnid-like move.

Work the muscles deep in your abdominals with this challenging move.

Take your plank — and your core — to the next level with this stability move.

Activate your core and strengthen your back with this comprehensive guide of techniques to decrease pain and improve spinal health.

Works your glutes, thighs, arms and shoulders with a focus on your core.

Train your body unilaterally while hitting your core and your grip big time with this variation of a traditional barbell deadlift.

Jack up your heart rate and target your core with this high-intensity move.

This twist on a classic will hit your abs, arms and chest.

Here’s how you can use the science of “shock” training to tighten your core.

Five steps to one of the best exercises you probably aren’t doing.

This multi-purpose, multi-joint move increases strength and shreds your abs.

Torch your core with this weighted move

Barbell deadlifts are a challenging but essential move to have in your training arsenal. Here’s how to do them properly.

This total-body conditioner is a great functional exercise that mimics every day movements in and out of the gym.

Give your lower body and core a double-whammy workout by taking your goblet squat on high. Do this as a primer for heavy squats or as a burnout after training legs.

Love ’em or hate ’em, planks are one of the best moves you can do to strengthen your entire core top to bottom, side to side and around the middle. Here’s the lowdown on doing this move properly in order to forge abs of steel.

This plank works your core, chest, glutes, outer thighs and shoulders. Here’s how to do this multi-tasking move.

The plank is one of the best exercises for your core. Here's how to get the most out of this ab move.

The stability ball pike will help flatten your stomach while spicing up your abdominal routine.

Do this advanced take on a stability ball crunch and you'll have a tighter core in less than a month!

Try the up and down plank to work your arms and your core. This no-equipment move engages your midsection, tones your abs and strengthens your back muscles while targeting your arms and building upper body strength.