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.
Start your routine with core moves. Marines use planks, side bridges (shown), hanging leg raises, and Supermans, among other exercises. For a complete core routine, go to MensHealth.com/marines. Perform each exercise in the Marine Corps arsenal in the order shown. Do 1 set of 8 to 10 repetitions for each move except the side bridge. (Hold the side bridge for 20 to 30 seconds on each side.) Rest up to 60 seconds between exercises.