Performing the: A Step-by-Step Tutorial Landmine Kneeling One Arm Shoulder Press
Kneel down next to the barbell, with your right knee on the ground and your left foot planted in front of you. Hold the top end of the barbell in your right hand at shoulder height.
Keep your core engaged and your back straight, then press the barbell upwards until your arm is fully extended.
Slowly lower the barbell back down to the starting position, keeping control of the movement.
Repeat this for your desired number of repetitions, then switch sides to work the other arm.