Most trainers love to suggest doing planks to work the core, and for some pretty good reasons. The classic core-stabilising move is so simple, yet so effective. Plus, unlike some other core exercises that involve bending, flexing, or twisting motions, the plank is generally considered to be really safe for most people with low-back pain. The plank is one of the best exercises for core conditioning, and it also works your glutes and hamstrings, supports proper posture.
