Lower Back Pain Pin ItUpper Back Exercise Video Called the Sphynx Posted on March 9th, 2014 by Tamara GollanThe Sphynx Upper back exercise.If you have poor upper body posture and starting to get a hunchback then this 4 minute video will show you a simple upper back exercise to correct your posture and strengthen the muscles needed in your upper back.For this exercise all you need is a mat or a bl