Lie face down on a flat bench or raised surface with your hips at the edge and legs hanging off. Keep your core engaged and grip the bench for stability. With legs slightly bent or straight depending on comfort, lift your legs upward by extending through your hips until they align with your torso or slightly above. Focus on squeezing your glutes at the top while keeping your lower back controlled. Pause briefly, then lower your legs slowly back down without letting them rest or swing. Repeat for the desired reps with smooth, controlled motion.
Log your old school reverse extensions sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.