To do the dead landmine, load one end of a barbell with weight and place the opposite and empty end of the barbell on the floor, or in a grappler/landmine stand. Stand facing the loaded end of the barbell with the weight plate in between your feet and your left foot closer to the end of the barbell. Squat down and grab the barbell using an underhand grip with your left hand and an overhand grip on the right. Extend at the hips and knees to drive the weighted end of the barbell off the floor. As the weight passes your hips use your arms to continue lifting the bar as you pivot your feet to swing the end of the bar across your chest and towards your right side. As the bar reaches chest level in front of you swap your hand position so that your right hand is using an underhand grip and is closest to your chest and your left hand is using an overhand grip. Continue pivoting your feet as you lower the bar to the floor on the right side. Once the barbell touches the floor, repeat on the right side to swing it over to the left side and repeat for the prescribed time interval.