Lie flat on a bench holding a barbell with an overhand grip. Start with arms extended above your chest, then bend only at the elbows to slowly lower the bar toward your forehead or just above. Keep upper arms stationary and elbows close to your head, then extend back up by contracting the triceps. Focus on controlled motion throughout.
Log your barbell lying extension sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.