Which variation of the plank can add difficulty to the exercise?

The side plank is a variation of the traditional plank exercise that significantly increases the difficulty by engaging different muscle groups and requiring greater stability and balance. In a side plank, the body is positioned on one side, supported by one forearm and the side of one foot, while the opposite arm can be extended upward or placed on the hip. This positioning requires not only core strength to maintain the posture but also challenges the obliques, shoulders, and hips more than a standard plank.

Furthermore, side planks develop lateral stability and strength, which are important for overall core robustness and willfulness. This variation can also be modified to increase its intensity further, such as by adding leg lifts or dynamic movements. Thus, the side plank effectively increases the challenge of the plank exercise compared to variations that might offer decreased difficulty or focus on different muscle engagement, like planks on knees or static planks.