Kraus Weber Postural Muscles Test, Part 3
To test the strength of the upper back muscles have your friend lie face down while you give them plenty of pressure with your arms and hands over the back of the upper leg. Have them clasp their hands behind their head and raise their head, chest, and shoulders as if they were a plane taking off. Once again have them hold their position for a count of ten. If they can not, then this corrective exercise is in order.
To test the strength of the low back have them remain face down and apply firm pressure to their upper back with your arms and hands. Ask them to lift both legs off the floor without bending the knees. You guessed it, hold the count for ten seconds. Otherwise, this corrective exercise will help.
Continue with the last test.