1. Lie on your back with knees bent and feet flat on the floor. 2. Hold a weight (plate, dumbbell, or similar) against your chest or behind your head. 3. Engage your core and lift your upper body toward your knees in a crunch motion. 4. Exhale as you crunch up, keeping the weight stable. 5. Slowly lower back down with control to the starting position.
Log your weighted crunch (version 2) sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.