Tunneling through hard rock almost always involves blasting. Workers use a scaffold, called ajumbo, to place explosives quickly and safely. The jumbo moves to the face of the tunnel, and drills mounted to the jumbo make several holes in the rock. The depth of the holes can vary depending o...
To perform this exercise, you should stand in the shallow end of the water. While sitting back into the water, tread with both hands at your sides and lift both legs together so your body forms a "V," bending at your hips. It is important to try and keep your head and toes above ...
To perform this exercise, you should stand in the shallow end of the water. While sitting back into the water, tread with both hands at your sides and lift both legs together so your body forms a "V," bending at your hips. It is important to try and keep your head and toes above ...
Lift your legs up a lot. An even more difficult version is the pike chin-up, in which you raise your legs straight in front of you so that they’re parallel to the floor and your body forms an ‘L.’ What Can I Do Instead of the Chin-Up? If you don’t have access to a chin...
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Switch sides. You can also do this across your back, holding the back arm in place with your other hand. Part 2 Increasing Strength and Muscle Mass of Your Shoulders Download Article 1 Include barbell or dumbbell shoulder presses. A classic shoulder exercise that will complement pike push-...
Repeat and change sides. Whether you try the self-assisted or negative one-armed push-up, make sure to switch it up and use your other arm. You can also alternate arms for each rep rather than doing a full set. It is important to use both arms to avoid creating muscle imbalances or...