Set a decline bench (about 15–30°) and secure your feet. Lie back holding a dumbbell in each hand with arms extended above your chest and palms facing each other. Keep your upper arms stationary and elbows tucked in. Slowly bend your elbows to lower the dumbbells toward the sides of your head or behind it. Pause briefly at the bottom, then extend your elbows to bring the dumbbells back to the starting position. Repeat with full control.
Log your dumbbell decline triceps extension sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.