1. Spaulding National Running Center, Cambridge, MA, USA
2. Department of Physical Therapy, Springfield College, Springfield, MA, USA
3. Department of Physical Therapy, MGH Institute of Health Professions, Boston, MA, USA
4. School of Sport, Coaching & Exercise Science, University of Lincoln, Lincoln, Lincolnshire, UK
5. Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, MA, USA