Set an incline bench so you can lie chest-down with your head supported. Hold a dumbbell in each hand with arms extended. Keep your chest and head on the bench for support. Pull the dumbbells up toward your sides by driving your elbows back and squeezing your shoulder blades together. Lower the dumbbells back down with control and repeat for reps.
Log your dumbbell head supported row sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.