PT - JOURNAL ARTICLE AU - Gerrard, D TI - Physical activity for patients: an exercise prescription AID - 10.1136/bjsm.37.6.561-a DP - 2003 Dec 01 TA - British Journal of Sports Medicine PG - 561--562 VI - 37 IP - 6 4099 - http://bjsm.bmj.com/content/37/6/561.2.short 4100 - http://bjsm.bmj.com/content/37/6/561.2.full SO - Br J Sports Med2003 Dec 01; 37