Bananas may be one of the best foods for energy. They are an excellent source of carbohydrates, potassium and vitamin B6, all of which can help boost energy levels in your body. One study showed that eating a banana before a 75-km cycling trial was as efficient as a carbohydrate drink for improving the performance of endurance athletes.
Salmon and tuna are great sources of protein, B vitamins, fatty acids, making them good foods to include in your diet. Also, you should know that studies determined that taking omega-3 supplements could decrease fatigue, especially in cancer patients and those recovering from cancer. So, try to eat more often fatty fish.