Really want to get into the deepest parts of your core? How about a plank? There are difficult varieties like the hardstyle plank and eight-point plank, a favorite of pro surfer Lakey Peterson. There ...

Side plants target the obliques, protect your spine, and strengthen your core, along with other benefits. To get the full effect, make sure you use the proper form. You can also try variations. The ...

Planks strengthen your core, back, glutes, hamstrings, arms, and shoulders at the same time. They put less strain on your spine and hip flexors than crunches or situps. This article provides 15 plank ...