Lie face down on a flat rack or bench with a dumbbell in each hand. Let your arms hang straight down toward the floor. Keeping your chest supported and core braced, pull the dumbbells up toward your hips by squeezing your shoulder blades together. Pause briefly at the top, then slowly lower the weights back to the starting position under control.
Log your dumbbell lying row on rack sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.