Side plank with row and march (fast)
Recommended: 3 sets of 6–10 per side
WHY IT’S DONE: This a fun, run-specific twist on the side plank. It allows you to get the core, hip and shoulder stabilizers involved. HOW IT’S DONE: In the side plank position, bring the upper leg up in to a march stance; as you bring it down, do a row with the top arm using an elastic or cable. Start slow to establish coordination, but once you have it, go fast. VARIATION: If this is too advanced, do a regular side plank.