Start in a plank position with your legs wider than hip distance; the wider stance makes you more stable. Hold onto your dumbbells, keeping your wrists locked to protect the joints.
With your core tight and your glutes engaged, exhale, stabilizing your torso as you lift your left elbow to row; feel your left shoulder blade sliding toward your spine as you bend your elbow up toward the ceiling.
Keeping your neck long and energized, return the weight to the ground. Repeat the movement on your right side.
Do as many rows as you can in 45 seconds. Take a 15-second rest.