In other words, if you want to improve core strength, you need to do exercises that require the engagement of the glutes and shoulders. The woodchop does just that, as do the other exercises included on this "best" list. Plus, the woodchop itself is excellent at working the obliques in addition to the rectus abdominis and transverse abdominis, really helping develop strength and definition throughout your core.
Start with a dumbbell or medicine ball version of the exercise, and as you get stronger, progress to a cable crossover or resistance band version with greater resistance.
3. Plank and plank variations
When it comes to enhancing core stabilization while targeting the deep, transverse abdominis, it's hard to beat the standard plank. Surprisingly, though, the isometric exercise is also effective at hitting the rectus abdominis (the six-pack muscle) and the obliques. Kendall likes it because, "You can do this movement practically anywhere, and it's easy to manipulate the degree of difficulty. If a regular plank is too easy, lift one arm or a leg. Try putting your forearms on a stability ball, or your feet in TRX straps. You can also take the plank to the side to better target the obliques -- the variations are endless!"