This test measures the mobility in your hamstrings and lower back, but can also detect certain problems or stiffness in your hips, which can limit a proper set up for your full swing short or putting stroke. If you are unable to perform this test, you will not be able to maintain your posture (body angles) throughout your swing, which will make it difficult to keep the club on plane. Low test results may also be related to loss of power, loss of posture and swaying.