Effects of a Progressive Resistance Training in Cachectic Cancer Patients During Radiotherapy - a Randomized Controlled Pilot Trial

Cancer cachexia is a prevalent symptom of head and neck neoplasms. The reduction in skeletal muscle mass is one of the main characteristics which can lead to poor physical functioning. The purpose of this study was to determine the feasibility of progressive resistance training in cachectic head and neck cancer patients during radiotherapy in a pilot randomized controlled design.

Baseline data for all participants were ascertained via medical records and patient interview. This included demographic information, Union internationale contre le cancer-status (UICC-status), comorbidities and the results of blood samples. Outcomes were measured at admission. One study coordinator completed all assessments to enhance patient compliance. Body weight loss percentage was calculated via the individuals' body weight 6 months before (in retrospect) and the current body weight. Participants completed two questionnaires: The Multidimensional Fatigue Inventory and the Functional Assessment of Anorexia/Cachexia Therapy questionnaire. Six-Minute Walk Test was applied. To document changes in muscle force, strength of the functional muscle group for elbow flexion in supine position as well as of knee extension in sitting position (in each case right and left) was tested via hand-held dynamometry for isometric maximal muscle strength. Bioelectrical impedance analysis was executed to assess the adaption in body composition.

The exercise intervention was undertaken in the hospitals department of physical and rehabilitation medicine and based on standardized but individualized training protocols. It consisted of a warm up period for 5 minutes on a bicycle ergometer or an upper body cycle with individual selectable wattage. A leg press, a latissimus pull-down and a chest press formed the three equipment supported core exercises. All exercises were performed with 8-12 repetitions and 3 sets.