1. PNF in practice: an illustrated guide;Adler,1993
2. Guidelines for exercise testing and prescription;American College of Sports Medicine,1991
3. Motion measured from forefoot and hindfoot landmarks during passive ankle dorsiflexion range of motion;Bohannon;Journal of Orthopaedic and Sport Physical Therapy,1991
4. Psychophysical bases of perceived exertion;Borg;Medicine and Science in Sports and Exercise,1982
5. Exercise comes of age: rationale and recommendations for a geriatric exercise prescription;Fiatarone Singh;Journal of Gerontology,2002