30 Day Plank Challenge Pro

The plank (also called a front hold, hover, or abdominal bridge) is an isometric core strength exercise that involves maintaining a difficult position for extended periods of time. The most common plank is the front plank which is held in a push-up position with the body's weight borne on forearms, elbows, and toes.

The plank strengthens the abdominals, back, and shoulders. Muscles involved in the front plank include:

Primary muscles: erector spinae, rectus abdominis (abs), and transverse abdominus.[citation needed]

Secondary muscles (synergists/segmental stabilizers): trapezius (traps), rhomboids, rotator cuff, the anterior, medial, and posterior deltoid muscles (delts), pectorals (pecs), serratus anterior, gluteus maximus (glutes), quadriceps.