Lie flat on the floor under the barbell with knees bent and feet planted, gripping the bar with an even overhand grip slightly wider than shoulder-width.
Unrack or take the bar and position it over your chest with arms fully extended.
Inhale, brace your core, and lower the bar until your upper arms rest on the floor with elbows at roughly 45 degrees.
Pause briefly with the elbows touching down.
Exhale and press the bar straight up until your arms are fully extended, returning to the start.