LyrArc Article Gist
Holding tension in any position that does not have dynamic movement is isometric exercise. The British Journal of Sports Medicine has a study with research that shows this isometric exercise done with squatting on the wall (or with a ball against the wall) for support for 2 minutes repeated 4 times with rest periods of two minutes each time for total 4 wall sits, taking 14 minutes, can reduce systolic blood pressure top number by 10 mmHg and diastolic pressure by 5 mmHg. Jamie O'Driscoll the lead author of the study says this is useful for people doing aerobic exercise, and yet could benefit from the use of isometric wall squats. A clinical exercise physiologist at University of Michigan says isometric exercise works because contracting a muscle and holding that position reduces blood flow to that muscle, when you release blood flow increases to muscle tissue. It creates signals that tell blood vessels to relax more and create less resistance to blood flow. To do this wall sit find a wall to lean against and take a couple of steps forward, feet hip width apart and slide your back down the wall and your knees getting to a 90 degree angle gradually. This uses quadriceps, glutes, calves, all leg muscles and abdominal muscles.