The following are my
recommended reference materials for foam rolling therapy and
flexibility training: The Foam Rolling Bible, Total Foam Rolling Techniques, Foam Roller Workbook, Delavier's Stretching Anatomy, Prescriptive Stretching, Stretch to Win
In the NPRM, the Department
recommended flexibility in the materials and
training method used, but proposed recertification every three years and retraining in the event of material changes in policy.