Sit on the ground facing the landmine with your legs spread. Hold the end of the bar in one hand in front of that shoulder with your palm facing across your body.
While keeping your torso tall and your core braced, drive the bar upwards until your arm is fully extended, leaning forward slightly for full range of motion in the shoulder joint. Lower the bar back down to the starting position with control.
Repeat for desired number of reps on one side, then switch sides.
راهنمای تمرین Landmine Seated Single Arm Overhead Press - تمرین Shoulders | MuscleWiki