By Dr. WIliam Donald Kelley, DDS
http://educate-yourself.org/cancer/kellyexercising13dec02.shtml
Dec.13, 2002

In almost every case of cancer, particularly those cases of long standing, the protein from the muscles has been used to maintain life. In other words protein metabolism has been so poor that the body had to take protein from the muscles and, to a very great degree, the muscles have been consumed.

After the cancer is destroyed, the muscles begin to rebuild. This takes approximately three years. If the muscles are exercised strenuously during this time a hernia may develop. For this reason we have found it best to replace strenuous exercise with a brisk walk at least once a day for three years following therapy.