I backpack about 10-12 miles (19.3 kilo). I ate about 17oz of fruit and dried nuts each day. Now, I am adding 1/2 cup of oatmeal in the morning. I know people

I backpack about 10-12 miles (19.3 kilo). I ate about 17oz of fruit and dried nuts each day. Now, I am adding 1/2 cup of oatmeal in the morning. I know people that backpack the same distance and they are consuming 4000-5000 calories per day!