Adding single-leg raises to your standard planks helps isolate and strengthen some of the smaller abdominal muscles. They can also reveal muscle imbalances, and correcting those small imbalances can help prevent injury and strengthen your running overall.
1. GET SET
Start in a standard elbow-plank position.
2. ACTIVATE CORE
Maintain a tight core all the way through; shoulder blades pulled back, lower abs pulling up (it’s okay if your hips are up just a tad as long as the lower abs are pulling up and underneath you.
3. RAISE ONE FOOT