Back Relief
Lower back disorders are painfully common. In the United States, back pain is the single most common cause of job-related disability. Stretches can help keep your lower back in good working order.
If you feel discomfort, pain, or other symptoms change the way you work or the equipment you use. Always look for better ways to do your job.
http://www.dir.ca.gov/dosh/dosh_publications/janitors.pdfpage 25
http://www.wikihow.com/Do-a-Lower-Back-Stretch-Safely
http://www.mayoclinic.com/health/stretching/SM00043&slide=7 – P
http://www.webmd.com/fitness-exercise/cat-camel
http://www.everydayhealth.com/back-pain-pictures/best-yoga-poses-to-soothe-back-pain.aspx#/slide-1
http://www.ninds.nih.gov/disorders/backpain/detail_backpain.htm