Sleep-wake disturbances are frequently looked at as “symptom clusters”—groups of interrelated symptoms that can occur simultaneously and interact with each other to cause additional symptoms or worsen existing ones. Symptoms from cancer and its treatment have been studied as clusters only since around 2001 (Beck, Dudley, & Barsevick, 2005).
Specific Effects of Aerobic Exercise Studies of aerobic exercise regimens ranging from supervised treadmill tests to stationary bike programs three times a week for 10–12 weeks showed that participants experienced (Visovsky & Dvorak, 2005)
Although more than one definition can be found, quality of life (QOL) is often defined as a state of well-being in which an individual can perform daily activities, combined with satisfaction with the levels of functioning and control of the disease and/or its symptoms (Hacker, 2009). Key to this definition is patients’ perception of their own QOL versus healthcare providers’ impression of it.
Side effects from cancer treatment can greatly affect the quality of life for many patients. Among the many troubling side effects, patients often describe loss of functional capacity and fatigue as some of the most debilitating (Hanna, Avila, Meteer, Nicholas, & Kaminsky, 2008). Research has found, however, that exercise has proven to be an effective management tool. What Is Important About Exercise and Its Relationship to Cancer?