Soo Locks Menu. A birdseye view of the Soo Locks facility from the lower approach. The St. Marys River is the only water connection between Lake Superior and the other Great Lakes. Near the upper end of the river the water drops 21 feet over hard sandstone in a short Â¾ mile long stretch.
The bridge exercise is a great way to isolate and strengthen the gluteus (butt) muscles and hamstrings (back of the thigh). If you do this exercise correctly, you also will find that it is a good core stability and strength exercise that targets the abdominal muscles as well as the muscles of lower back and hip.
How to Do the Bridge Exercise. 1  Make sure your feet are under your knees. 2  Tighten your abdominal and buttock muscles. 3  Raise your hips up to create a straight line from your knees to shoulders. 4  Squeeze your core and try to pull your belly button back toward your spine. 5  If your hips sag or drop, lower yourself back on the floor.