In a plank position, reach your left arm back and then circle it overhead, bringing your palm back to the floor; repeat on the other side. This counts as one rep. POPSUGAR Studios ...

There are many ways to do a plank, from straight-arm, side, and one-legged planks to plank knee taps and jacks. These moves target your abdominal muscles.

RKC Plank: Squeeze everything—glutes, abs, quads, fists—for short, high-tension holds. Plank Shoulder Taps: Fight rotation as you lift one hand and touch the opposite shoulder. Hollow Body ...

Single-Arm Plank. Westend61/Westend61/Getty Images. For an added challenge, ... Start in a high plank. Lower onto one of your forearms, then the other, all while maintaining plank form.

First, if you have any preexisting conditions, such as osteoporosis, talk to your doctor before starting any new exercises.

After a beat, drive your butt up and reach down with one arm to touch one toe, then the other, before straightening back into the plank position. Repeat with the other arm. DAY 4 Plank Thread the ...

Two-Point Plank. What it does: Strengthens the entire core, and trains anti-rotational stability and cross-body coordination. How to do it: Start in a front plank with your feet one to two feet apart.

Pick up one arm and press that hand into the ground toward a high, straight-arm plank; do the same action with the other hand to complete the transition from low plank to high.

Plank pikes are a mobility and core exercise that target and strengthen multiple muscle groups. Our fitness writer did 70 reps every day for a week. Here's what happened.