Maintain proper running form, engage core. Avoid overstriding and poor arm mechanics.
Hold plank position, engage core. Mistakes: Sagging hips, not engaging core.
Hold plank position on side, engage core. Mistakes: Collapsing hips, not engaging core.
Lift hips up in side plank position. Mistakes: Collapsing hips, not engaging core.
Lift legs, tap toes to floor. Mistakes: Using momentum, not engaging core.
Lift legs to 90 degrees, engage core. Mistakes: Using momentum, not engaging core.
Rotate torso side to side, engage core. Mistakes: Not fully rotating, not engaging core.