| Exclusion Criteria: | 1) Patients must be: (1) Postoperative abdominal surgical cancer patient less than 21 years of age. (2) Are not ambulatory. (3) Are not cognitively intact. (4) Have any of the following: severe neuromuscular disease, cardiovascular disease, pacemakers, inner-ear disturbances, known peripheral vascular disease that interferes with ambulation, are on sympathetic inhibitory or mood altering drugs. All patients will have epidural and/or patient controlled analgesia as their primary mode of postoperative pain control and those who do not will be excluded. |