What is the best way to prevent chemo and radiotherapy induced fatigue?

Exercise: In general, the best way to reduce the amount fatigue that occurs with chemotherapy or radiation (and maybe prevent it) is to stay active.

Conserve energy: In addition to staying active, it's important to conserve your energy when possible. Think of your energy as a bank. Your savings are lower when you are getting chemo and radiation, so you need to budget them! you can sit down while brushing your teeth, limit trips on the stairs, sit while cooking, etc. To save your energy for that walk at the end of the day.

Nutrition & Herbs!: Chemotherapy & radiation put a tremendous toll on our bodies. Many supplements & herbs are proven to reduce toxicity & side effects of these while actually enhancing effectiveness! advice is best individualized with help from a qualified practitioner but this article gives a good overview: http://www.Nutrition-matters.Com/oncology_nutrition.Pdf also see beating cancer with nutrition by p.Quillin.